Identification_Information:

Citation:

Citation_Information:

Originator: Connie L. Dicken

Originator: Suzanne W. Nicholson

Originator: John D. Horton

Originator: Scott A. Kinney

Originator: Gregory Gunther

Originator: Michael P. Foose

Originator: Julia A.L. Mueller

Publication_Date: 2005

Title: Integrated Geologic Map Databases for the United States:
Delaware, Maryland, New York, Pennsylvania, and Virginia

Edition: version 1.0

Geospatial_Data_Presentation_Form: map

Series_Information:

Series_Name: U.S. Geological Survey Open-File Report

Issue_Identification: 2005-1325

Publication_Information:

Publication_Place: Reston, VA

Publisher: U.S. Geological Survey

Online_Linkage: http://pubs.usgs.gov/of/2005/1325

Description:

Abstract: This report presents the results of the USGS Mineral Resources
Program activity to compile a national-scale geologic map database at a
nominal scale of 1:500,000, to support national and regional level
projects, including mineral resource and geoenvironmental assessments.
The only comprehensive sources for input into regional- and
national-scale geologic maps are state geologic maps with scales ranging
from 1:100,000 to 1:1,000,000. Digital versions of these state maps form
the core of what is presented here. Because no adequate geologic map
exists for the state of Alaska, it is being compiled as regional blocks
of 3 degree quadrangles that also form part of this national database.
It is expected that this series will completed by approximately the end
of 2007. These maps and databases are being released in blocks of states
or, in the case of Alaska, as compiled blocks of 1:250,000-scale
quadrangles as chapters in this series. For Alaska, formal maps as well
as databases are being published here, whereas for the conterminous U.S.
only state databases are presented, because published maps for most
states already exist. For Alaska these regional compilations will form
the base for compiling a new geologic map of the state. As documented in
CONUS documentation, standards for the conterminous U.S. are somewhat
different than those for Alaska and Hawaii.

Purpose: A primary goal of this work is to develop geologic map datasets
with standardized structure and attribution. The database design and
standards are documented in Chapter A of this series. The intent is that
contiguous databases can be merged seamlessly and without any additional
effort. In addition to a common database structure, the conterminous
U.S. state databases (the contiguous 48 states) have been fitted to a
set of standard state boundaries derived from the USGS Digial Line Graph
1:100,000 quadrangle boundaries (Johnson and Leveritch, 1998) so that,
when states are merged, they match without slivers or overlap. No
attempt has been made to reconcile differences in mapping across state
boundaries.

Supplemental_Information:

This database consists of five major Arc/Info GIS datasets for each
state;

\- one: geologic map with formations,

\- two: faults (where present),

\- three: dikes (where present),

\- four: miscellaneous line features (where present),

\- five: miscellaneous point features (where present).

Time_Period_of_Content:

Time_Period_Information:

Single_Date/Time:

Calendar_Date: 2005

Currentness_Reference: publication date

Status:

Progress: Complete

Maintenance_and_Update_Frequency: none planned

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate: -79.487450 (decimal degrees)

East_Bounding_Coordinate: -74.907940 (decimal degrees)

North_Bounding_Coordinate: 39.722987 (decimal degrees)

South_Bounding_Coordinate: 37.886571 (decimal degrees)

Keywords:

Theme:

Theme_Keyword_Thesaurus: none

Theme_Keyword: geology

Place:

Place_Keyword_Thesaurus: none

Place_Keyword: USA

Place_Keyword: Maryland

Theme:

Theme_Keyword_Thesaurus: National Geologic Map Database Catalog themes,
augmented

Theme_Keyword: 3100 - Vector

Theme_Keyword: 3110 - ESRI

Theme_Keyword: 3112 - export

Theme_Keyword: 1100 - Geology

Theme_Keyword: 1101 - General

Place:

Place_Keyword_Thesaurus: Augmented FIPS 10-4 and FIPS 6-4, version 1.0

Place_Keyword: US24 = Maryland

Access_Constraints: none

Use_Constraints:

This database is not meant to be used or displayed at any scale other

than 1:500,000.

Any hardcopies utilizing these data sets shall clearly indicate

their source. If the licensee has modified the data in any way

they are obligated to describe the types of modifications they

have performed on the hardcopy map. Licensee specifically agrees

not to misrepresent these data sets, nor to imply that changes they

made were approved by the U.S. Geological Survey.

Point_of_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Suzanne W. Nicholson

Contact_Organization: U.S. Geological Survey

Contact_Address:

Address_Type: mailing and physical address

Address: 12201 Sunrise Valley Dr. MS954

City: Reston

State_or_Province: VA

Postal_Code: 20192

Country: USA

Contact_Voice_Telephone: 703-648-6344

Contact_Electronic_Mail_Address: swnich@usgs.gov

Data_Set_Credit:

State Geologic Map Compilation (SGMC) activity of the National Surveys
and Analysis

projects of the US Geological Survey Mineral Resources Program.

Native_Data_Set_Environment:

ARC/INFO version 8.3 and 9.0

ArcView 3.2

Data_Quality_Information:

Attribute_Accuracy:

Attribute_Accuracy_Report: The values of the attributes ROCKTYPE1 and
ROCKTYPE2 were assigned based on the information in the legends of the
source maps (most of which are paper). The definitions of these values
are described in the draft document Geologic Map Classification version
6.1 (Johnson and others); available at the following website:
http://www.nadm-geo.org/dmdt/index.html

Logical_Consistency_Report: All internal polygons were checked for
closure with vendor software and on hard copy plots. Overshoots and
undershoots have been deleted or corrected as appropriate.

Completeness_Report: Bodies of water are classified as water, and the
geologic units underlying them are not included in this coverage.

Positional_Accuracy:

Horizontal_Positional_Accuracy:

Horizontal_Positional_Accuracy_Report:

Accuracy of Maryland state boundary and those arcs intersecting it: The
accuracy of the state boundary arcs is based on the 1:100,000 scale
original data used to produce this boundary. (Johnson, Bruce R. and
Leveritch, Beth, 1998, 1:100,000 Scale State Boundaries of the
Conterminous United States: U.S. Geological Survey, unpublished).

Those internal arcs intersecting the state boundary were extended or
shortened as needed to complete polygons, possibly creating a small
amount of error.

Lineage:

Source_Information:

Source_Citation:

Citation_Information:

Originator: Cleaves, E.T.

Originator: Edwards, J., Jr.

Originator: Glaserm J.D.

Publication_Date: 1968

Title: Geologic Map of Maryland

Geospatial_Data_Presentation_Form: map

Publication_Information:

Publication_Place: Baltimore, Maryland

Publisher: Maryland Geological Survey

Other_Citation_Details: Unpublished digital version of the Maryland
state geologic map was digitized by the USGS Water Resources Office in
Towson, MD and provided vector data.

Online_Linkage: none

Source_Scale_Denominator: 250,000

Type_of_Source_Media: paper map

Source_Time_Period_of_Content:

Time_Period_Information:

Single_Date/Time:

Calendar_Date: 1968

Source_Currentness_Reference: publication date

Source_Citation_Abbreviation: md geology

Source_Contribution: provided geology for state map

Source_Information:

Source_Citation:

Citation_Information:

Originator: Bruce R. Johnson

Publication_Date: unpublished

Title: 1:100,000 Scale State Boundaries of the Conterminous United
States

Geospatial_Data_Presentation_Form: vector data

Other_Citation_Details: Arc/INFO coverage developed by Bruce Johnson.
Derived from USGS 100,000-scale DLG boundary layer quadrangles.

Source_Scale_Denominator: 100,000

Type_of_Source_Media: online

Source_Time_Period_of_Content:

Time_Period_Information:

Single_Date/Time:

Calendar_Date: 1998

Source_Currentness_Reference: unknown

Source_Citation_Abbreviation: state boundaries

Source_Contribution: provided linework of the conterminous state
boundaries

Source_Information:

Source_Citation:

Citation_Information:

Originator: Bruce R. Johnson

Publication_Date: unpublished

Title: Geologic Map Unit Classification, ver. 6.1

Geospatial_Data_Presentation_Form: unknown

Other_Citation_Details: Document has been modified and is included in
Appedices of the publication.

Source_Scale_Denominator: none

Type_of_Source_Media: online; http:/geology.usgs.gov/dm

Source_Time_Period_of_Content:

Time_Period_Information:

Single_Date/Time:

Calendar_Date: 1998

Source_Currentness_Reference: unknown

Source_Citation_Abbreviation: lithclass

Source_Contribution: Source of lithologic codes and specific rock names
found in ROCKTYPE1 and ROCKTYPE2.

Process_Step:

Process_Description: The purpose of this standardization is to allow all
covers to be seamlessly joined without any additional effort to form
regional or national level digital maps. Note that for Alaska, the state
is being compiled as blocks of 1:250k quadrangles that will ultimately
be used to compile a new state map. Douglas Stoeser and Ric Wilson are
co-coordinators for the overall State Geologic Map Compilation (SGMC)
effort, with Stoeser coordinating work on the mainland states and Wilson
coordinating work for Alaska and Hawaii.

Process_Date: 2003 - 2005

Process_Step:

Process_Description:

A digital geologic map of Maryland was provided by the State of Maryland
through Jim Manning through ftp to Julia Mueller. C.L. Dicken received
the digital file.

The coverage was re-projected into the following:

projection: Lambert Conformal Conic

units: meters

datum: NAD27

standard parallel 1: 33 0 0.000

standard parallel 2: 45 0 0.000

central meridian: -100 0 0.000

reference latitude: 0 0 0.000

false easting: 0.00000

false northing: 0.00000

Note: Attributes associated with the generation of the coverages were
not deleted.

PAT - shape, area, perimeter, coverage#, and coverage-id

AAT - shape, fnode#, tnode#, lnode#, rnode#, length, coverage#, and
coverage-id)

All attributes were deleted except map_code.

The values from map_code where then calculated into a new field called
orig_label.

Process_Date: 2005

Process_Step:

Process_Description:

The relevant state outline (arcs) was removed from the coverage and
replaced with the arcs from the 1:100,000 Scale State Boundaries of the
Conterminous United States.

This allows for a seamless fit of each state to a standard state
boundary base.

Process_Date: 2005

Process_Step:

Process_Description:

The following attributes were exported from Filemaker as a .dbf:

orig_label, map_symbol2, unit_link, reference_id, unit_age, rocktype1,
and rocktype2.

orig_label reflects the original map symbol used on the source map

map_symbol2 reflects map-symbol1 with the addition of a province number
(renamed sgmc_label in PAT)

unit_link is an auto generated field based on map-symbol2 and the state
abbreviation (e.g. IN001) that produces a unique identifier for each map
unit

reference_id was populated with an alphanumeric code (e.g. US001) that
designates the source used for the linework and other references used to
describe the age or lithologies of the unit. (renamed source in PAT)

unit_age was populated with general age assignment

rocktype1 records dominant lithology (must be \>50% of unit), using
standardized data dictionary

rocktype2 records second most dominant lithology, using standardized
data dictionary

The attributes were then converted using the following structure:

item name: orig_label

width: 12

output: 12

type: c

item name: sgmc_label

width: 16

output: 16

type: c

item name: unit_link

width: 18

output: 18

type: c

item name: source

width: 6

output: 8

type: c

item name: unit_age

width: 60

output: 60

type: c

item name: rocktype1

width: 40

output: 40

type: c

item name: rocktype2

width: 40

output: 40

type: c

Process_Date: 2005

Process_Step:

Process_Description: Once the .dbf was in the correct format with
standardized column widths and data structure, it was converted into a
lookup table (.lut) in Arc/Info. Then a joinitem was performed to join
the look-up table to the polygon attribute table. orig_label was used as
the merge item.

Process_Date: 2005

Process_Step:

Process_Description:

Next, in preparing the uniform .aat file, the following items were added
to the table:

item name: arc-code

width: 3

output: 3

type: i

item name: arc-para1

width: 3

output: 3

type: i

item name: arc-para2

width: 3

output: 3

type: i

item name: source

width: 6

output: 8

type: c

Process_Date: 2005

Process_Step:

Process_Description:

Arc-code was populated using the paper map source to tag the lines using
the AAT line type data dictionary (see CONUS documentation in this
series).

Arc-para1 was populated when additional information was available such
as identifying the upthrown side of a fault or direction of thrusting on
a fault. (see CONUS documentation)

Arc-para2 is a scratch field that is used mostly in Alaska.

Source was populated with an alphanumeric code (e.g. US001) that
designates the source used for the linework.

Process_Date: 2005

Process_Step:

Process_Description:

Once the .aat and the .pat were populated with the correct attributes,
the coverage was exported as an .e00 file (MDgeol_lcc.e00).

Then it was unprojected into geographic coordinates and exported again
(MDgeol_dd.e00).

Process_Date: 2005

Process_Step:

Process_Description: Finally, the geology lines and geology polygons
were converted into shapefiles; in both geographic coordinates and in
Lambert Conformal Conic projection.

Process_Date: 2005

Spatial_Data_Organization_Information:

Direct_Spatial_Reference_Method: Vector

Spatial_Reference_Information:

Horizontal_Coordinate_System_Definition:

Planar:

Map_Projection:

Map_Projection_Name: Lambert Conformal Conic

Lambert_Conformal_Conic:

Standard_Parallel: 33

Standard_Parallel: 45

Longitude_of_Central_Meridian: -100.0

Latitude_of_Projection_Origin: 0

False_Easting: 0.00000

False_Northing: 0.00000

Planar_Coordinate_Information:

Planar_Coordinate_Encoding_Method: coordinate pair

Coordinate_Representation:

Abscissa_Resolution: 0.01

Ordinate_Resolution: 0.01

Planar_Distance_Units: Meters

Geodetic_Model:

Horizontal_Datum_Name: North American Datum of 1927

Ellipsoid_Name: Clarke 1866

Semi-major_Axis: 6378206.4

Denominator_of_Flattening_Ratio: 294.98

Entity_and_Attribute_Information:

Detailed_Description:

Entity_Type:

Entity_Type_Label: MD_geol.pat

Entity_Type_Definition: Polygon attribute table for the Maryland
geologic coverage.

Entity_Type_Definition_Source: ESRI

Attribute:

Attribute_Label: ORIG_LABEL

Attribute_Definition:

unmodified map unit symbol from source cover.

type: character

width: 12

output width: 12

Attribute_Definition_Source: Doug Stoeser

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: bgb

Enumerated_Domain_Value_Definition: Baltimore Gabbro Complex

Enumerated_Domain:

Enumerated_Domain_Value: Ca

Enumerated_Domain_Value_Definition: Chilhowee Group; Antietam Formation

Enumerated_Domain:

Enumerated_Domain_Value: Ce

Enumerated_Domain_Value_Definition: Elbrook Limestone

Enumerated_Domain:

Enumerated_Domain_Value: Cf

Enumerated_Domain_Value_Definition: Frederick Limestone

Enumerated_Domain:

Enumerated_Domain_Value: Ct

Enumerated_Domain_Value_Definition: Tomstown Dolomite

Enumerated_Domain:

Enumerated_Domain_Value: Cwb

Enumerated_Domain_Value_Definition: Waynesboro Formation

Enumerated_Domain:

Enumerated_Domain_Value: cc

Enumerated_Domain_Value_Definition: Cardiff Metaconglomerate

Enumerated_Domain:

Enumerated_Domain_Value: cm

Enumerated_Domain_Value_Definition: Cockeysville Marble

Enumerated_Domain:

Enumerated_Domain_Value: Dch

Enumerated_Domain_Value_Definition: \"Chemung\" Formation, Parkhead
Sandstone, Brallier Formation, and Harrell Shale

Enumerated_Domain:

Enumerated_Domain_Value: Dh

Enumerated_Domain_Value_Definition: Hampshire Formation

Enumerated_Domain:

Enumerated_Domain_Value: Dhn

Enumerated_Domain_Value_Definition: Hamilton Group (including Mahantango
Formation and Marcellus Shale), and including Tioga Metabentontite Bed,
and Needmore Shale

Enumerated_Domain:

Enumerated_Domain_Value: Do

Enumerated_Domain_Value_Definition: Oriskany Group including Ridgeley
Sandstone and Shriver Chert

Enumerated_Domain:

Enumerated_Domain_Value: DShk

Enumerated_Domain_Value_Definition: Helderberg Formation and Keyser
Limestone

Enumerated_Domain:

Enumerated_Domain_Value: gm

Enumerated_Domain_Value_Definition: Georgetown Mafic Complex

Enumerated_Domain:

Enumerated_Domain_Value: hf

Enumerated_Domain_Value_Definition: Chilhowee Group; Harpers Formation

Enumerated_Domain:

Enumerated_Domain_Value: if

Enumerated_Domain_Value_Definition: Ijamsville Formation

Enumerated_Domain:

Enumerated_Domain_Value: if-ms

Enumerated_Domain_Value_Definition: Ijamsville Formation and Marburg
Schist

Enumerated_Domain:

Enumerated_Domain_Value: jg

Enumerated_Domain_Value_Definition: James Run Gneiss

Enumerated_Domain:

Enumerated_Domain_Value: Km

Enumerated_Domain_Value_Definition: Magothy Formation

Enumerated_Domain:

Enumerated_Domain_Value: Kma

Enumerated_Domain_Value_Definition: Matawan Formation

Enumerated_Domain:

Enumerated_Domain_Value: Kmo

Enumerated_Domain_Value_Definition: Monmouth Formation

Enumerated_Domain:

Enumerated_Domain_Value: Kp

Enumerated_Domain_Value_Definition: Potomac Group, including Raritan and
Patapsco Formations, Arundel Clay, and Patuxent Formation

Enumerated_Domain:

Enumerated_Domain_Value: lf

Enumerated_Domain_Value_Definition: Chilhowee Group; Loudoun Formation

Enumerated_Domain:

Enumerated_Domain_Value: lmr

Enumerated_Domain_Value_Definition: Libertytown Metarhyolite

Enumerated_Domain:

Enumerated_Domain_Value: Mg

Enumerated_Domain_Value_Definition: Greenbrier Formation

Enumerated_Domain:

Enumerated_Domain_Value: mgb

Enumerated_Domain_Value_Definition: Metagabbro and Amphibolite

Enumerated_Domain:

Enumerated_Domain_Value: Mmc

Enumerated_Domain_Value_Definition: Mauch Chunk Formation

Enumerated_Domain:

Enumerated_Domain_Value: Mp

Enumerated_Domain_Value_Definition: Pocono Group, including the Purslane
Sandstone and Rockwell Formation

Enumerated_Domain:

Enumerated_Domain_Value: ms

Enumerated_Domain_Value_Definition: Marburg Schist

Enumerated_Domain:

Enumerated_Domain_Value: OCc

Enumerated_Domain_Value_Definition: Conococheague Limestone

Enumerated_Domain:

Enumerated_Domain_Value: OCg

Enumerated_Domain_Value_Definition: Grove Limestone

Enumerated_Domain:

Enumerated_Domain_Value: Ocs

Enumerated_Domain_Value_Definition: Chambersburg Limestone and St. Paul
Group (including New Market Limestone and Row Park Limestone)

Enumerated_Domain:

Enumerated_Domain_Value: Oj

Enumerated_Domain_Value_Definition: Juniata Formation

Enumerated_Domain:

Enumerated_Domain_Value: Om

Enumerated_Domain_Value_Definition: Martinsburg Formation

Enumerated_Domain:

Enumerated_Domain_Value: Ops

Enumerated_Domain_Value_Definition: Pinesburg Station Dolomite

Enumerated_Domain:

Enumerated_Domain_Value: Orr

Enumerated_Domain_Value_Definition: Rockdale Run Formation

Enumerated_Domain:

Enumerated_Domain_Value: Os

Enumerated_Domain_Value_Definition: Stonehenge Limestone

Enumerated_Domain:

Enumerated_Domain_Value: Pap

Enumerated_Domain_Value_Definition: Allegheny Formation and Pottsville
Formation

Enumerated_Domain:

Enumerated_Domain_Value: Pc

Enumerated_Domain_Value_Definition: Conemaugh Formation

Enumerated_Domain:

Enumerated_Domain_Value: Pm

Enumerated_Domain_Value_Definition: Monongahela Formation

Enumerated_Domain:

Enumerated_Domain_Value: pbs

Enumerated_Domain_Value_Definition: Peach Bottom Slate

Enumerated_Domain:

Enumerated_Domain_Value: pCbg

Enumerated_Domain_Value_Definition: Baltimore Gneiss

Enumerated_Domain:

Enumerated_Domain_Value: pCc

Enumerated_Domain_Value_Definition: Catoctin Metabasalt

Enumerated_Domain:

Enumerated_Domain_Value: pCg

Enumerated_Domain_Value_Definition: Granodiorite and Biotite Granite
Gneiss

Enumerated_Domain:

Enumerated_Domain_Value: pCmv

Enumerated_Domain_Value_Definition: Metarhyolite and Aasociated
Pyroclastic Sediments

Enumerated_Domain:

Enumerated_Domain_Value: pCsr

Enumerated_Domain_Value_Definition: Swift Run Formation

Enumerated_Domain:

Enumerated_Domain_Value: Pd

Enumerated_Domain_Value_Definition: Dunkard Group

Enumerated_Domain:

Enumerated_Domain_Value: Pze

Enumerated_Domain_Value_Definition: Ellicott City Granodiorite

Enumerated_Domain:

Enumerated_Domain_Value: Pzg

Enumerated_Domain_Value_Definition: Guilford Quartz Monznoite

Enumerated_Domain:

Enumerated_Domain_Value: Pzgd

Enumerated_Domain_Value_Definition: Quartz Gabbro and Quartz Diorite
Gneiss

Enumerated_Domain:

Enumerated_Domain_Value: Pzgg

Enumerated_Domain_Value_Definition: Gunpowder Granite

Enumerated_Domain:

Enumerated_Domain_Value: Pzk

Enumerated_Domain_Value_Definition: Kensington Quartz Diorite

Enumerated_Domain:

Enumerated_Domain_Value: Pzmg

Enumerated_Domain_Value_Definition: Muscovite Quartz Monzonite Gneiss

Enumerated_Domain:

Enumerated_Domain_Value: Pzn

Enumerated_Domain_Value_Definition: Norbeck Quartz Diorite

Enumerated_Domain:

Enumerated_Domain_Value: Pzp

Enumerated_Domain_Value_Definition: Pegmatite Dikes

Enumerated_Domain:

Enumerated_Domain_Value: Pzpd

Enumerated_Domain_Value_Definition: Port Deposit Gneiss

Enumerated_Domain:

Enumerated_Domain_Value: Pzr

Enumerated_Domain_Value_Definition: Relay Quartz Diorite

Enumerated_Domain:

Enumerated_Domain_Value: Pzw

Enumerated_Domain_Value_Definition: Woodstock Quartz Monznoite

Enumerated_Domain:

Enumerated_Domain_Value: Qdu

Enumerated_Domain_Value_Definition: Quaternary Deposits Undivided

Enumerated_Domain:

Enumerated_Domain_Value: Ql

Enumerated_Domain_Value_Definition: Lowland Deposits

Enumerated_Domain:

Enumerated_Domain_Value: QTu

Enumerated_Domain_Value_Definition: Upland Deposits (Western Shore)

Enumerated_Domain:

Enumerated_Domain_Value: Qu

Enumerated_Domain_Value_Definition: Upland Deposits (Eastern Shore)

Enumerated_Domain:

Enumerated_Domain_Value: Sc

Enumerated_Domain_Value_Definition: Clinton Group, including Rochester
Shale

Enumerated_Domain:

Enumerated_Domain_Value: scm

Enumerated_Domain_Value_Definition: Sams Creek Metabasalt

Enumerated_Domain:

Enumerated_Domain_Value: sf

Enumerated_Domain_Value_Definition: Setters Formation

Enumerated_Domain:

Enumerated_Domain_Value: Sm

Enumerated_Domain_Value_Definition: McKenzie Formation

Enumerated_Domain:

Enumerated_Domain_Value: sq

Enumerated_Domain_Value_Definition: Sugarloaf Mountain Quartzite

Enumerated_Domain:

Enumerated_Domain_Value: srl

Enumerated_Domain_Value_Definition: Silver Run Limestone

Enumerated_Domain:

Enumerated_Domain_Value: St

Enumerated_Domain_Value_Definition: Tuscarora Sandstone

Enumerated_Domain:

Enumerated_Domain_Value: Stl

Enumerated_Domain_Value_Definition: Tonoloway Limestone

Enumerated_Domain:

Enumerated_Domain_Value: Swb

Enumerated_Domain_Value_Definition: Wills Creek Shale and Bloomsburg
Formation

Enumerated_Domain:

Enumerated_Domain_Value: Ta

Enumerated_Domain_Value_Definition: Pamunkey Group; Aquia Formation

Enumerated_Domain:

Enumerated_Domain_Value: Tc

Enumerated_Domain_Value_Definition: Chesapeake Group; Calvert Formation

Enumerated_Domain:

Enumerated_Domain_Value: Tch

Enumerated_Domain_Value_Definition: Chesapeake Group; Choptank Formation

Enumerated_Domain:

Enumerated_Domain_Value: Tn

Enumerated_Domain_Value_Definition: Pamunkey Group; Nanjemoy Formation

Enumerated_Domain:

Enumerated_Domain_Value: Trd

Enumerated_Domain_Value_Definition: Diabase Sills and Dikes

Enumerated_Domain:

Enumerated_Domain_Value: Trg

Enumerated_Domain_Value_Definition: Gettysburg Shale

Enumerated_Domain:

Enumerated_Domain_Value: Trlc-Trqc

Enumerated_Domain_Value_Definition: New Oxford Formation

Enumerated_Domain:

Enumerated_Domain_Value: Trno

Enumerated_Domain_Value_Definition: New Oxford Formation

Enumerated_Domain:

Enumerated_Domain_Value: Ts

Enumerated_Domain_Value_Definition: Chesapeake Group; St. Marys
Formation

Enumerated_Domain:

Enumerated_Domain_Value: uf

Enumerated_Domain_Value_Definition: Urbana Formation

Enumerated_Domain:

Enumerated_Domain_Value: ug

Enumerated_Domain_Value_Definition: Ultramafic and Gabbroic Rocks

Enumerated_Domain:

Enumerated_Domain_Value: um

Enumerated_Domain_Value_Definition: Ultramafic Rocks

Enumerated_Domain:

Enumerated_Domain_Value: vc

Enumerated_Domain_Value_Definition: Volcanic Complex of Cecil County

Enumerated_Domain:

Enumerated_Domain_Value: water

Enumerated_Domain_Value_Definition: water

Enumerated_Domain:

Enumerated_Domain_Value: wbg

Enumerated_Domain_Value_Definition: Wissahickon Formation; Boulder
Gneiss

Enumerated_Domain:

Enumerated_Domain_Value: wf

Enumerated_Domain_Value_Definition: Chilhowee Group; Weverton Formation

Enumerated_Domain:

Enumerated_Domain_Value: wlps

Enumerated_Domain_Value_Definition: Wissahickon Formation; Lower Pelitic
Schist

Enumerated_Domain:

Enumerated_Domain_Value: wm

Enumerated_Domain_Value_Definition: Wakefield Marble

Enumerated_Domain:

Enumerated_Domain_Value: wmc

Enumerated_Domain_Value_Definition: Wissahickon Formation;
Metaconglomerate

Enumerated_Domain:

Enumerated_Domain_Value: wmg

Enumerated_Domain_Value_Definition: Wissahickon Formation; Metagraywacke

Enumerated_Domain:

Enumerated_Domain_Value: wu

Enumerated_Domain_Value_Definition: Wissahickon Formation (Undivided)

Enumerated_Domain:

Enumerated_Domain_Value: wups

Enumerated_Domain_Value_Definition: Wissahickon Formation; Upper Pelitic
Schist

Attribute:

Attribute_Label: SGMC_LABEL

Attribute_Definition:

orig_label + ;n where n= province number (n=0 if no province number)

type: character

width: 16

output width: 16

Attribute_Definition_Source: Doug Stoeser

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: bgb;7

Enumerated_Domain_Value_Definition: Baltimore Gabbro Complex

Enumerated_Domain:

Enumerated_Domain_Value: CAa;2

Enumerated_Domain_Value_Definition: Chilhowee Group; Antietam Formation

Enumerated_Domain:

Enumerated_Domain_Value: CAe;1

Enumerated_Domain_Value_Definition: Elbrook Limestone

Enumerated_Domain:

Enumerated_Domain_Value: CAf;2

Enumerated_Domain_Value_Definition: Frederick Limestone

Enumerated_Domain:

Enumerated_Domain_Value: CAt;2

Enumerated_Domain_Value_Definition: Tomstown Dolomite

Enumerated_Domain:

Enumerated_Domain_Value: CAwb;1

Enumerated_Domain_Value_Definition: Waynesboro Formation

Enumerated_Domain:

Enumerated_Domain_Value: cc;4

Enumerated_Domain_Value_Definition: Cardiff Metaconglomerate

Enumerated_Domain:

Enumerated_Domain_Value: cm;4

Enumerated_Domain_Value_Definition: Cockeysville Marble

Enumerated_Domain:

Enumerated_Domain_Value: Dch;1

Enumerated_Domain_Value_Definition: \"Chemung\" Formation, Parkhead
Sandstone, Brallier Formation, and Harrell Shale

Enumerated_Domain:

Enumerated_Domain_Value: Dh;1

Enumerated_Domain_Value_Definition: Hampshire Formation

Enumerated_Domain:

Enumerated_Domain_Value: Dhn;1

Enumerated_Domain_Value_Definition: Hamilton Group (including Mahantango
Formation and Marcellus Shale), and including Tioga Metabentontite Bed,
and Needmore Shale

Enumerated_Domain:

Enumerated_Domain_Value: Do;1

Enumerated_Domain_Value_Definition: Oriskany Group including Ridgeley
Sandstone and Shriver Chert

Enumerated_Domain:

Enumerated_Domain_Value: DShk;1

Enumerated_Domain_Value_Definition: Helderberg Formation and Keyser
Limestone

Enumerated_Domain:

Enumerated_Domain_Value: gm;7

Enumerated_Domain_Value_Definition: Georgetown Mafic Complex

Enumerated_Domain:

Enumerated_Domain_Value: hf;2

Enumerated_Domain_Value_Definition: Chilhowee Group; Harpers Formation

Enumerated_Domain:

Enumerated_Domain_Value: if;3

Enumerated_Domain_Value_Definition: Ijamsville Formation

Enumerated_Domain:

Enumerated_Domain_Value: if-ms;3

Enumerated_Domain_Value_Definition: Ijamsville Formation and Marburg
Schist

Enumerated_Domain:

Enumerated_Domain_Value: jg;4

Enumerated_Domain_Value_Definition: James Run Gneiss

Enumerated_Domain:

Enumerated_Domain_Value: Km;5

Enumerated_Domain_Value_Definition: Magothy Formation

Enumerated_Domain:

Enumerated_Domain_Value: Kma;5

Enumerated_Domain_Value_Definition: Matawan Formation

Enumerated_Domain:

Enumerated_Domain_Value: Kmo;5

Enumerated_Domain_Value_Definition: Monmouth Formation

Enumerated_Domain:

Enumerated_Domain_Value: Kp;5

Enumerated_Domain_Value_Definition: Potomac Group, including Raritan and
Patapsco Formations, Arundel Clay, and Patuxent Formation

Enumerated_Domain:

Enumerated_Domain_Value: lf;2

Enumerated_Domain_Value_Definition: Chilhowee Group; Loudoun Formation

Enumerated_Domain:

Enumerated_Domain_Value: lmr;3

Enumerated_Domain_Value_Definition: Libertytown Metarhyolite

Enumerated_Domain:

Enumerated_Domain_Value: Mg;1

Enumerated_Domain_Value_Definition: Greenbrier Formation

Enumerated_Domain:

Enumerated_Domain_Value: mgb;7

Enumerated_Domain_Value_Definition: Metagabbro and Amphibolite

Enumerated_Domain:

Enumerated_Domain_Value: Mmc;1

Enumerated_Domain_Value_Definition: Mauch Chunk Formation

Enumerated_Domain:

Enumerated_Domain_Value: Mp;1

Enumerated_Domain_Value_Definition: Pocono Group, including the Purslane
Sandstone and Rockwell Formation

Enumerated_Domain:

Enumerated_Domain_Value: ms;3

Enumerated_Domain_Value_Definition: Marburg Schist

Enumerated_Domain:

Enumerated_Domain_Value: OCAc;1

Enumerated_Domain_Value_Definition: Conococheague Limestone

Enumerated_Domain:

Enumerated_Domain_Value: OCAg;2

Enumerated_Domain_Value_Definition: Grove Limestone

Enumerated_Domain:

Enumerated_Domain_Value: Ocs;1

Enumerated_Domain_Value_Definition: Chambersburg Limestone and St. Paul
Group (including New Market Limestone and Row Park Limestone)

Enumerated_Domain:

Enumerated_Domain_Value: Oj;1

Enumerated_Domain_Value_Definition: Juniata Formation

Enumerated_Domain:

Enumerated_Domain_Value: Om;1

Enumerated_Domain_Value_Definition: Martinsburg Formation

Enumerated_Domain:

Enumerated_Domain_Value: Ops;1

Enumerated_Domain_Value_Definition: Pinesburg Station Dolomite

Enumerated_Domain:

Enumerated_Domain_Value: Orr;1

Enumerated_Domain_Value_Definition: Rockdale Run Formation

Enumerated_Domain:

Enumerated_Domain_Value: Os;1

Enumerated_Domain_Value_Definition: Stonehenge Limestone

Enumerated_Domain:

Enumerated_Domain_Value: PAap;1

Enumerated_Domain_Value_Definition: Allegheny Formation and Pottsville
Formation

Enumerated_Domain:

Enumerated_Domain_Value: PAc;1

Enumerated_Domain_Value_Definition: Conemaugh Formation

Enumerated_Domain:

Enumerated_Domain_Value: PAm;1

Enumerated_Domain_Value_Definition: Monongahela Formation

Enumerated_Domain:

Enumerated_Domain_Value: pbs;4

Enumerated_Domain_Value_Definition: Peach Bottom Slate

Enumerated_Domain:

Enumerated_Domain_Value: pCAbg;4

Enumerated_Domain_Value_Definition: Baltimore Gneiss

Enumerated_Domain:

Enumerated_Domain_Value: pCAc;2

Enumerated_Domain_Value_Definition: Catoctin Metabasalt

Enumerated_Domain:

Enumerated_Domain_Value: pCAg;2

Enumerated_Domain_Value_Definition: Granodiorite and Biotite Granite
Gneiss

Enumerated_Domain:

Enumerated_Domain_Value: pCAmv;2

Enumerated_Domain_Value_Definition: Metarhyolite and Aasociated
Pyroclastic Sediments

Enumerated_Domain:

Enumerated_Domain_Value: pCAsr;2

Enumerated_Domain_Value_Definition: Swift Run Formation

Enumerated_Domain:

Enumerated_Domain_Value: Pd;1

Enumerated_Domain_Value_Definition: Dunkard Group

Enumerated_Domain:

Enumerated_Domain_Value: PZe;6

Enumerated_Domain_Value_Definition: Ellicott City Granodiorite

Enumerated_Domain:

Enumerated_Domain_Value: PZg;6

Enumerated_Domain_Value_Definition: Guilford Quartz Monznoite

Enumerated_Domain:

Enumerated_Domain_Value: PZgd;6

Enumerated_Domain_Value_Definition: Quartz Gabbro and Quartz Diorite
Gneiss

Enumerated_Domain:

Enumerated_Domain_Value: PZgg;6

Enumerated_Domain_Value_Definition: Gunpowder Granite

Enumerated_Domain:

Enumerated_Domain_Value: PZk;6

Enumerated_Domain_Value_Definition: Kensington Quartz Diorite

Enumerated_Domain:

Enumerated_Domain_Value: PZmg;6

Enumerated_Domain_Value_Definition: Muscovite Quartz Monzonite Gneiss

Enumerated_Domain:

Enumerated_Domain_Value: PZn;6

Enumerated_Domain_Value_Definition: Norbeck Quartz Diorite

Enumerated_Domain:

Enumerated_Domain_Value: PZp;6

Enumerated_Domain_Value_Definition: Pegmatite Dikes

Enumerated_Domain:

Enumerated_Domain_Value: PZpd;6

Enumerated_Domain_Value_Definition: Port Deposit Gneiss

Enumerated_Domain:

Enumerated_Domain_Value: PZr;7

Enumerated_Domain_Value_Definition: Relay Quartz Diorite

Enumerated_Domain:

Enumerated_Domain_Value: PZw;6

Enumerated_Domain_Value_Definition: Woodstock Quartz Monznoite

Enumerated_Domain:

Enumerated_Domain_Value: Qdu;5

Enumerated_Domain_Value_Definition: Quaternary Deposits Undivided

Enumerated_Domain:

Enumerated_Domain_Value: Ql;5

Enumerated_Domain_Value_Definition: Lowland Deposits

Enumerated_Domain:

Enumerated_Domain_Value: QTu;5

Enumerated_Domain_Value_Definition: Upland Deposits (Western Shore)

Enumerated_Domain:

Enumerated_Domain_Value: Qu;5

Enumerated_Domain_Value_Definition: Upland Deposits (Eastern Shore)

Enumerated_Domain:

Enumerated_Domain_Value: Sc;1

Enumerated_Domain_Value_Definition: Clinton Group, including Rochester
Shale

Enumerated_Domain:

Enumerated_Domain_Value: scm;3

Enumerated_Domain_Value_Definition: Sams Creek Metabasalt

Enumerated_Domain:

Enumerated_Domain_Value: sf;4

Enumerated_Domain_Value_Definition: Setters Formation

Enumerated_Domain:

Enumerated_Domain_Value: Sm;1

Enumerated_Domain_Value_Definition: McKenzie Formation

Enumerated_Domain:

Enumerated_Domain_Value: sq;3

Enumerated_Domain_Value_Definition: Sugarloaf Mountain Quartzite

Enumerated_Domain:

Enumerated_Domain_Value: srl;3

Enumerated_Domain_Value_Definition: Silver Run Limestone

Enumerated_Domain:

Enumerated_Domain_Value: St;1

Enumerated_Domain_Value_Definition: Tuscarora Sandstone

Enumerated_Domain:

Enumerated_Domain_Value: Stl;1

Enumerated_Domain_Value_Definition: Tonoloway Limestone

Enumerated_Domain:

Enumerated_Domain_Value: Swb;1

Enumerated_Domain_Value_Definition: Wills Creek Shale and Bloomsburg
Formation

Enumerated_Domain:

Enumerated_Domain_Value: Ta;5

Enumerated_Domain_Value_Definition: Pamunkey Group; Aquia Formation

Enumerated_Domain:

Enumerated_Domain_Value: Tc;5

Enumerated_Domain_Value_Definition: Chesapeake Group; Calvert Formation

Enumerated_Domain:

Enumerated_Domain_Value: Tch;5

Enumerated_Domain_Value_Definition: Chesapeake Group; Choptank Formation

Enumerated_Domain:

Enumerated_Domain_Value: Tn;5

Enumerated_Domain_Value_Definition: Pamunkey Group; Nanjemoy Formation

Enumerated_Domain:

Enumerated_Domain_Value: TRd;2

Enumerated_Domain_Value_Definition: Diabase Sills and Dikes

Enumerated_Domain:

Enumerated_Domain_Value: TRg;2

Enumerated_Domain_Value_Definition: Gettysburg Shale

Enumerated_Domain:

Enumerated_Domain_Value: TRlc-TRqc;2

Enumerated_Domain_Value_Definition: New Oxford Formation

Enumerated_Domain:

Enumerated_Domain_Value: TRno;2

Enumerated_Domain_Value_Definition: New Oxford Formation

Enumerated_Domain:

Enumerated_Domain_Value: Ts;5

Enumerated_Domain_Value_Definition: Chesapeake Group; St. Marys
Formation

Enumerated_Domain:

Enumerated_Domain_Value: uf;3

Enumerated_Domain_Value_Definition: Urbana Formation

Enumerated_Domain:

Enumerated_Domain_Value: ug;7

Enumerated_Domain_Value_Definition: Ultramafic and Gabbroic Rocks

Enumerated_Domain:

Enumerated_Domain_Value: um;7

Enumerated_Domain_Value_Definition: Ultramafic Rocks

Enumerated_Domain:

Enumerated_Domain_Value: vc;4

Enumerated_Domain_Value_Definition: Volcanic Complex of Cecil County

Enumerated_Domain:

Enumerated_Domain_Value: water;0

Enumerated_Domain_Value_Definition: water

Enumerated_Domain:

Enumerated_Domain_Value: wbg;4

Enumerated_Domain_Value_Definition: Wissahickon Formation; Boulder
Gneiss

Enumerated_Domain:

Enumerated_Domain_Value: wf;2

Enumerated_Domain_Value_Definition: Chilhowee Group; Weverton Formation

Enumerated_Domain:

Enumerated_Domain_Value: wlps;4

Enumerated_Domain_Value_Definition: Wissahickon Formation; Lower Pelitic
Schist

Enumerated_Domain:

Enumerated_Domain_Value: wm;3

Enumerated_Domain_Value_Definition: Wakefield Marble

Enumerated_Domain:

Enumerated_Domain_Value: wmc;4

Enumerated_Domain_Value_Definition: Wissahickon Formation;
Metaconglomerate

Enumerated_Domain:

Enumerated_Domain_Value: wmg;4

Enumerated_Domain_Value_Definition: Wissahickon Formation; Metagraywacke

Enumerated_Domain:

Enumerated_Domain_Value: wu;3

Enumerated_Domain_Value_Definition: Wissahickon Formation (Undivided)

Enumerated_Domain:

Enumerated_Domain_Value: wups;4

Enumerated_Domain_Value_Definition: Wissahickon Formation; Upper Pelitic
Schist

Attribute:

Attribute_Label: unit_link

Attribute_Definition:

composite map label = ST + sgmc_label

This creates a unique identifier for every unit in the CONUS
(continental United States) covers.

type: character

width: 18

output width: 18

Attribute_Definition_Source: Doug Stoeser

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: MDbgb;7

Enumerated_Domain_Value_Definition: Baltimore Gabbro Complex

Enumerated_Domain:

Enumerated_Domain_Value: MDCAa;2

Enumerated_Domain_Value_Definition: Chilhowee Group; Antietam Formation

Enumerated_Domain:

Enumerated_Domain_Value: MDCAe;1

Enumerated_Domain_Value_Definition: Elbrook Limestone

Enumerated_Domain:

Enumerated_Domain_Value: MDCAf;2

Enumerated_Domain_Value_Definition: Frederick Limestone

Enumerated_Domain:

Enumerated_Domain_Value: MDCAt;2

Enumerated_Domain_Value_Definition: Tomstown Dolomite

Enumerated_Domain:

Enumerated_Domain_Value: MDCAwb;1

Enumerated_Domain_Value_Definition: Waynesboro Formation

Enumerated_Domain:

Enumerated_Domain_Value: MDcc;4

Enumerated_Domain_Value_Definition: Cardiff Metaconglomerate

Enumerated_Domain:

Enumerated_Domain_Value: MDcm;4

Enumerated_Domain_Value_Definition: Cockeysville Marble

Enumerated_Domain:

Enumerated_Domain_Value: MDDch;1

Enumerated_Domain_Value_Definition: \"Chemung\" Formation, Parkhead
Sandstone, Brallier Formation, and Harrell Shale

Enumerated_Domain:

Enumerated_Domain_Value: MDDh;1

Enumerated_Domain_Value_Definition: Hampshire Formation

Enumerated_Domain:

Enumerated_Domain_Value: MDDhn;1

Enumerated_Domain_Value_Definition: Hamilton Group (including Mahantango
Formation and Marcellus Shale), and including Tioga Metabentontite Bed,
and Needmore Shale

Enumerated_Domain:

Enumerated_Domain_Value: MDDo;1

Enumerated_Domain_Value_Definition: Oriskany Group including Ridgeley
Sandstone and Shriver Chert

Enumerated_Domain:

Enumerated_Domain_Value: MDDShk;1

Enumerated_Domain_Value_Definition: Helderberg Formation and Keyser
Limestone

Enumerated_Domain:

Enumerated_Domain_Value: MDgm;7

Enumerated_Domain_Value_Definition: Georgetown Mafic Complex

Enumerated_Domain:

Enumerated_Domain_Value: MDhf;2

Enumerated_Domain_Value_Definition: Chilhowee Group; Harpers Formation

Enumerated_Domain:

Enumerated_Domain_Value: MDif;3

Enumerated_Domain_Value_Definition: Ijamsville Formation

Enumerated_Domain:

Enumerated_Domain_Value: MDif-ms;3

Enumerated_Domain_Value_Definition: Ijamsville Formation and Marburg
Schist

Enumerated_Domain:

Enumerated_Domain_Value: MDjg;4

Enumerated_Domain_Value_Definition: James Run Gneiss

Enumerated_Domain:

Enumerated_Domain_Value: MDKm;5

Enumerated_Domain_Value_Definition: Magothy Formation

Enumerated_Domain:

Enumerated_Domain_Value: MDKma;5

Enumerated_Domain_Value_Definition: Matawan Formation

Enumerated_Domain:

Enumerated_Domain_Value: MDKmo;5

Enumerated_Domain_Value_Definition: Monmouth Formation

Enumerated_Domain:

Enumerated_Domain_Value: MDKp;5

Enumerated_Domain_Value_Definition: Potomac Group, including Raritan and
Patapsco Formations, Arundel Clay, and Patuxent Formation

Enumerated_Domain:

Enumerated_Domain_Value: MDlf;2

Enumerated_Domain_Value_Definition: Chilhowee Group; Loudoun Formation

Enumerated_Domain:

Enumerated_Domain_Value: MDlmr;3

Enumerated_Domain_Value_Definition: Libertytown Metarhyolite

Enumerated_Domain:

Enumerated_Domain_Value: MDMg;1

Enumerated_Domain_Value_Definition: Greenbrier Formation

Enumerated_Domain:

Enumerated_Domain_Value: MDmgb;7

Enumerated_Domain_Value_Definition: Metagabbro and Amphibolite

Enumerated_Domain:

Enumerated_Domain_Value: MDMmc;1

Enumerated_Domain_Value_Definition: Mauch Chunk Formation

Enumerated_Domain:

Enumerated_Domain_Value: MDMp;1

Enumerated_Domain_Value_Definition: Pocono Group, including the Purslane
Sandstone and Rockwell Formation

Enumerated_Domain:

Enumerated_Domain_Value: MDms;3

Enumerated_Domain_Value_Definition: Marburg Schist

Enumerated_Domain:

Enumerated_Domain_Value: MDOCAc;1

Enumerated_Domain_Value_Definition: Conococheague Limestone

Enumerated_Domain:

Enumerated_Domain_Value: MDOCAg;2

Enumerated_Domain_Value_Definition: Grove Limestone

Enumerated_Domain:

Enumerated_Domain_Value: MDOcs;1

Enumerated_Domain_Value_Definition: Chambersburg Limestone and St. Paul
Group (including New Market Limestone and Row Park Limestone)

Enumerated_Domain:

Enumerated_Domain_Value: MDOj;1

Enumerated_Domain_Value_Definition: Juniata Formation

Enumerated_Domain:

Enumerated_Domain_Value: MDOm;1

Enumerated_Domain_Value_Definition: Martinsburg Formation

Enumerated_Domain:

Enumerated_Domain_Value: MDOps;1

Enumerated_Domain_Value_Definition: Pinesburg Station Dolomite

Enumerated_Domain:

Enumerated_Domain_Value: MDOrr;1

Enumerated_Domain_Value_Definition: Rockdale Run Formation

Enumerated_Domain:

Enumerated_Domain_Value: MDOs;1

Enumerated_Domain_Value_Definition: Stonehenge Limestone

Enumerated_Domain:

Enumerated_Domain_Value: MDPAap;1

Enumerated_Domain_Value_Definition: Allegheny Formation and Pottsville
Formation

Enumerated_Domain:

Enumerated_Domain_Value: MDPAc;1

Enumerated_Domain_Value_Definition: Conemaugh Formation

Enumerated_Domain:

Enumerated_Domain_Value: MDPAm;1

Enumerated_Domain_Value_Definition: Monongahela Formation

Enumerated_Domain:

Enumerated_Domain_Value: MDpbs;4

Enumerated_Domain_Value_Definition: Peach Bottom Slate

Enumerated_Domain:

Enumerated_Domain_Value: MDpCAbg;4

Enumerated_Domain_Value_Definition: Baltimore Gneiss

Enumerated_Domain:

Enumerated_Domain_Value: MDpCAc;2

Enumerated_Domain_Value_Definition: Catoctin Metabasalt

Enumerated_Domain:

Enumerated_Domain_Value: MDpCAg;2

Enumerated_Domain_Value_Definition: Granodiorite and Biotite Granite
Gneiss

Enumerated_Domain:

Enumerated_Domain_Value: MDpCAmv;2

Enumerated_Domain_Value_Definition: Metarhyolite and Aasociated
Pyroclastic Sediments

Enumerated_Domain:

Enumerated_Domain_Value: MDpCAsr;2

Enumerated_Domain_Value_Definition: Swift Run Formation

Enumerated_Domain:

Enumerated_Domain_Value: MDPd;1

Enumerated_Domain_Value_Definition: Dunkard Group

Enumerated_Domain:

Enumerated_Domain_Value: MDPZe;6

Enumerated_Domain_Value_Definition: Ellicott City Granodiorite

Enumerated_Domain:

Enumerated_Domain_Value: MDPZg;6

Enumerated_Domain_Value_Definition: Guilford Quartz Monznoite

Enumerated_Domain:

Enumerated_Domain_Value: MDPZgd;6

Enumerated_Domain_Value_Definition: Quartz Gabbro and Quartz Diorite
Gneiss

Enumerated_Domain:

Enumerated_Domain_Value: MDPZgg;6

Enumerated_Domain_Value_Definition: Gunpowder Granite

Enumerated_Domain:

Enumerated_Domain_Value: MDPZk;6

Enumerated_Domain_Value_Definition: Kensington Quartz Diorite

Enumerated_Domain:

Enumerated_Domain_Value: MDPZmg;6

Enumerated_Domain_Value_Definition: Muscovite Quartz Monzonite Gneiss

Enumerated_Domain:

Enumerated_Domain_Value: MDPZn;6

Enumerated_Domain_Value_Definition: Norbeck Quartz Diorite

Enumerated_Domain:

Enumerated_Domain_Value: MDPZp;6

Enumerated_Domain_Value_Definition: Pegmatite Dikes

Enumerated_Domain:

Enumerated_Domain_Value: MDPZpd;6

Enumerated_Domain_Value_Definition: Port Deposit Gneiss

Enumerated_Domain:

Enumerated_Domain_Value: MDPZr;7

Enumerated_Domain_Value_Definition: Relay Quartz Diorite

Enumerated_Domain:

Enumerated_Domain_Value: MDPZw;6

Enumerated_Domain_Value_Definition: Woodstock Quartz Monznoite

Enumerated_Domain:

Enumerated_Domain_Value: MDQdu;5

Enumerated_Domain_Value_Definition: Quaternary Deposits Undivided

Enumerated_Domain:

Enumerated_Domain_Value: MDQl;5

Enumerated_Domain_Value_Definition: Lowland Deposits

Enumerated_Domain:

Enumerated_Domain_Value: MDQTu;5

Enumerated_Domain_Value_Definition: Upland Deposits (Western Shore)

Enumerated_Domain:

Enumerated_Domain_Value: MDQu;5

Enumerated_Domain_Value_Definition: Upland Deposits (Eastern Shore)

Enumerated_Domain:

Enumerated_Domain_Value: MDSc;1

Enumerated_Domain_Value_Definition: Clinton Group, including Rochester
Shale

Enumerated_Domain:

Enumerated_Domain_Value: MDscm;3

Enumerated_Domain_Value_Definition: Sams Creek Metabasalt

Enumerated_Domain:

Enumerated_Domain_Value: MDsf;4

Enumerated_Domain_Value_Definition: Setters Formation

Enumerated_Domain:

Enumerated_Domain_Value: MDSm;1

Enumerated_Domain_Value_Definition: McKenzie Formation

Enumerated_Domain:

Enumerated_Domain_Value: MDsq;3

Enumerated_Domain_Value_Definition: Sugarloaf Mountain Quartzite

Enumerated_Domain:

Enumerated_Domain_Value: MDsrl;3

Enumerated_Domain_Value_Definition: Silver Run Limestone

Enumerated_Domain:

Enumerated_Domain_Value: MDSt;1

Enumerated_Domain_Value_Definition: Tuscarora Sandstone

Enumerated_Domain:

Enumerated_Domain_Value: MDStl;1

Enumerated_Domain_Value_Definition: Tonoloway Limestone

Enumerated_Domain:

Enumerated_Domain_Value: MDSwb;1

Enumerated_Domain_Value_Definition: Wills Creek Shale and Bloomsburg
Formation

Enumerated_Domain:

Enumerated_Domain_Value: MDTa;5

Enumerated_Domain_Value_Definition: Pamunkey Group; Aquia Formation

Enumerated_Domain:

Enumerated_Domain_Value: MDTc;5

Enumerated_Domain_Value_Definition: Chesapeake Group; Calvert Formation

Enumerated_Domain:

Enumerated_Domain_Value: MDTch;5

Enumerated_Domain_Value_Definition: Chesapeake Group; Choptank Formation

Enumerated_Domain:

Enumerated_Domain_Value: MDTn;5

Enumerated_Domain_Value_Definition: Pamunkey Group; Nanjemoy Formation

Enumerated_Domain:

Enumerated_Domain_Value: MDTRd;2

Enumerated_Domain_Value_Definition: Diabase Sills and Dikes

Enumerated_Domain:

Enumerated_Domain_Value: MDTRg;2

Enumerated_Domain_Value_Definition: Gettysburg Shale

Enumerated_Domain:

Enumerated_Domain_Value: MDTRlc-TRqc;2

Enumerated_Domain_Value_Definition: New Oxford Formation

Enumerated_Domain:

Enumerated_Domain_Value: MDTRno;2

Enumerated_Domain_Value_Definition: New Oxford Formation

Enumerated_Domain:

Enumerated_Domain_Value: MDTs;5

Enumerated_Domain_Value_Definition: Chesapeake Group; St. Marys
Formation

Enumerated_Domain:

Enumerated_Domain_Value: MDuf;3

Enumerated_Domain_Value_Definition: Urbana Formation

Enumerated_Domain:

Enumerated_Domain_Value: MDug;7

Enumerated_Domain_Value_Definition: Ultramafic and Gabbroic Rocks

Enumerated_Domain:

Enumerated_Domain_Value: MDum;7

Enumerated_Domain_Value_Definition: Ultramafic Rocks

Enumerated_Domain:

Enumerated_Domain_Value: MDvc;4

Enumerated_Domain_Value_Definition: Volcanic Complex of Cecil County

Enumerated_Domain:

Enumerated_Domain_Value: MDwater;0

Enumerated_Domain_Value_Definition: water

Enumerated_Domain:

Enumerated_Domain_Value: MDwbg;4

Enumerated_Domain_Value_Definition: Wissahickon Formation; Boulder
Gneiss

Enumerated_Domain:

Enumerated_Domain_Value: MDwf;2

Enumerated_Domain_Value_Definition: Chilhowee Group; Weverton Formation

Enumerated_Domain:

Enumerated_Domain_Value: MDwlps;4

Enumerated_Domain_Value_Definition: Wissahickon Formation; Lower Pelitic
Schist

Enumerated_Domain:

Enumerated_Domain_Value: MDwm;3

Enumerated_Domain_Value_Definition: Wakefield Marble

Enumerated_Domain:

Enumerated_Domain_Value: MDwmc;4

Enumerated_Domain_Value_Definition: Wissahickon Formation;
Metaconglomerate

Enumerated_Domain:

Enumerated_Domain_Value: MDwmg;4

Enumerated_Domain_Value_Definition: Wissahickon Formation; Metagraywacke

Enumerated_Domain:

Enumerated_Domain_Value: MDwu;3

Enumerated_Domain_Value_Definition: Wissahickon Formation (Undivided)

Enumerated_Domain:

Enumerated_Domain_Value: MDwups;4

Enumerated_Domain_Value_Definition: Wissahickon Formation; Upper Pelitic
Schist

Attribute:

Attribute_Label: source

Attribute_Definition:

An alphanumeric code (e.g. US001) that designates the source material
used.

type: character

width: 6

output width: 8

Attribute_Definition_Source: Doug Stoeser

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: MD001

Enumerated_Domain_Value_Definition: Cleaves, E.T., Edwards, J., Jr.,
Glaser, J.D., 1968, Geologic Map of Maryland: Maryland Geological
Survey, Baltimore, Maryland, scale 1:250,000.

Enumerated_Domain:

Enumerated_Domain_Value: MD002

Enumerated_Domain_Value_Definition: Unpublished digital version of the
Maryland state geologic map that was digitized by the USGS Water
Resources Office in Towson, MD

Enumerated_Domain:

Enumerated_Domain_Value: MD003

Enumerated_Domain_Value_Definition: Wetherill, G.W., Tilton, G.R.,
Davis, G.L., Hart, S.R., and Hopson, C.A., 1966, Age measurements in the
Maryland Piedmont: Journal of Geophysical Research, v. 71, p. 2139-2155.

Attribute:

Attribute_Label: unit_age

Attribute_Definition:

geologic age from the source map used.

type: character

width: 60

output width: 60

Attribute_Definition_Source: Doug Stoeser

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: Cambrian

Enumerated_Domain_Value: Cretaceous

Enumerated_Domain_Value: Devonian

Enumerated_Domain_Value: Early Paleozoic (?)

Enumerated_Domain_Value: Early Paleozoic - Late Precambrian (?)

Enumerated_Domain_Value: Eocene

Enumerated_Domain_Value: Late Precambrian

Enumerated_Domain_Value: Late Precambrian (?)

Enumerated_Domain_Value: Late Precambrian (?) - Early Paleozoic

Enumerated_Domain_Value: Late Precambrian - Cambrian

Enumerated_Domain_Value: Miocene

Enumerated_Domain_Value: Mississippian

Enumerated_Domain_Value: Ordovician

Enumerated_Domain_Value: Ordovician (?)

Enumerated_Domain_Value: Paleocene

Enumerated_Domain_Value: Paleozoic

Enumerated_Domain_Value: Pennsylvanian

Enumerated_Domain_Value: Permian

Enumerated_Domain_Value: Precambrian

Enumerated_Domain_Value: Quaternary

Enumerated_Domain_Value: Silurian

Enumerated_Domain_Value: Triassic

Enumerated_Domain_Value: Upper Cambrian to Lower Ordovician

Attribute:

Attribute_Label: rocktype1

Attribute_Definition:

The predominant lithology found in the formation.

type: character

width: 40

output width: 40

Attribute_Definition_Source: Johnson Lith Class 6.1a

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: calcarenite

Enumerated_Domain_Value: clay

Enumerated_Domain_Value: claystone

Enumerated_Domain_Value: conglomerate

Enumerated_Domain_Value: diabase

Enumerated_Domain_Value: dolostone (dolomite)

Enumerated_Domain_Value: gabbro

Enumerated_Domain_Value: gneiss

Enumerated_Domain_Value: granitic gneiss

Enumerated_Domain_Value: granodiorite

Enumerated_Domain_Value: gravel

Enumerated_Domain_Value: graywacke

Enumerated_Domain_Value: greenstone

Enumerated_Domain_Value: limestone

Enumerated_Domain_Value: marble

Enumerated_Domain_Value: meta-basalt

Enumerated_Domain_Value: meta-conglomerate

Enumerated_Domain_Value: metasedimentary rock

Enumerated_Domain_Value: mica schist

Enumerated_Domain_Value: mudstone

Enumerated_Domain_Value: orthoquartzite

Enumerated_Domain_Value: pegmatite

Enumerated_Domain_Value: phyllite

Enumerated_Domain_Value: quartz diorite

Enumerated_Domain_Value: quartz monzonite

Enumerated_Domain_Value: quartz-feldspar schist

Enumerated_Domain_Value: quartzite

Enumerated_Domain_Value: rhyolite

Enumerated_Domain_Value: sand

Enumerated_Domain_Value: sandstone

Enumerated_Domain_Value: schist

Enumerated_Domain_Value: serpentinite

Enumerated_Domain_Value: shale

Enumerated_Domain_Value: siltstone

Enumerated_Domain_Value: slate

Enumerated_Domain_Value: tonalite

Enumerated_Domain_Value: water

Attribute:

Attribute_Label: rocktype2

Attribute_Definition:

The second most predominant lithology in the formation.

type: character

width: 40

output width: 40

Attribute_Definition_Source: Johnson Lith Class 6.1

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: amphibolite

Enumerated_Domain_Value: calc-silicate schist

Enumerated_Domain_Value: calcarenite

Enumerated_Domain_Value: chert

Enumerated_Domain_Value: clay or mud

Enumerated_Domain_Value: conglomerate

Enumerated_Domain_Value: diorite

Enumerated_Domain_Value: dolostone (dolomite)

Enumerated_Domain_Value: dunite

Enumerated_Domain_Value: gneiss

Enumerated_Domain_Value: granite

Enumerated_Domain_Value: granitic gneiss

Enumerated_Domain_Value: granodiorite

Enumerated_Domain_Value: granulite

Enumerated_Domain_Value: gravel

Enumerated_Domain_Value: greenschist

Enumerated_Domain_Value: limestone

Enumerated_Domain_Value: meta-argillite

Enumerated_Domain_Value: mudstone

Enumerated_Domain_Value: norite

Enumerated_Domain_Value: orthoquartzite

Enumerated_Domain_Value: phyllite

Enumerated_Domain_Value: quartz diorite

Enumerated_Domain_Value: quartz monzonite

Enumerated_Domain_Value: quartzite

Enumerated_Domain_Value: sand

Enumerated_Domain_Value: sandstone

Enumerated_Domain_Value: schist

Enumerated_Domain_Value: serpentinite

Enumerated_Domain_Value: shale

Enumerated_Domain_Value: silt

Enumerated_Domain_Value: siltstone

Enumerated_Domain_Value: slate

Detailed_Description:

Entity_Type:

Entity_Type_Label: MD_geol.aat

Entity_Type_Definition: Arc attribute table for Maryland geologic
coverage.

Entity_Type_Definition_Source: ESRI

Attribute:

Attribute_Label: arc-code

Attribute_Definition:

Unique identifier for the line feature

type: integer

width: 3

output width: 3

Attribute_Definition_Source: AAT data dictionary

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: 1

Enumerated_Domain_Value_Definition: contact, location certain

Enumerated_Domain:

Enumerated_Domain_Value: 7

Enumerated_Domain_Value_Definition: shoreline or riverbank

Enumerated_Domain:

Enumerated_Domain_Value: 124

Enumerated_Domain_Value_Definition: state boundary

Attribute:

Attribute_Label: arc-para1

Attribute_Definition:

Used for \"decorated\" lines where additional information is needed.

type: integer

width: 3

output width: 3

Attribute_Definition_Source: AAT data dictionary

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: 0

Enumerated_Domain_Value_Definition: no additional information

Attribute:

Attribute_Label: arc-para2

Attribute_Definition:

\"Scratch\" field used mostly in Alaska.

type: integer

width: 3

output width: 3

Attribute_Definition_Source: AAT data dictionary

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: 0

Enumerated_Domain_Value_Definition: no additional information

Attribute:

Attribute_Label: source

Attribute_Definition:

An alphanumeric code (e.g. US001) that designates the source material
used.

type: character

width: 6

output width: 8

Attribute_Definition_Source: Doug Stoeser

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: MD001

Enumerated_Domain_Value_Definition: Unpublished digital version of the
Maryland state geologic map that was digitized by the USGS Water
Resources Office in Towson, MD

Enumerated_Domain:

Enumerated_Domain_Value: US001

Enumerated_Domain_Value_Definition: Johnson, Bruce R. and Leveritch,
Beth, 1998, 1:100,000 Scale State Boundaries of the Conterminous United
States: U.S. Geological Survey, unpublished (see metadata file:
st100kmeta.txt, Chapter A)

Overview_Description:

Entity_and_Attribute_Overview:

Coding for polygon attributes:

NAME: FEATURE:

orig_label unmodified map unit symbols from source cover

sgmc_label orig_label modified for standard geologic age symbols and an

integer code added for province

unit_link sgmc_label and a state code identifier

source reference to source of data

unit_age geologic age

rocktype1 predominant lithology

rocktype2 second most predominant lithology

Coding for arc attributes:

NAME: FEATURE:

arc-code unique integer identifier

arc-para1 used where additional information is needed

arc-para2 scratch field

source reference to source of data

Coding for point attributes:

NAME: FEATURE:

point_feature name of feature on map

source reference to source of data

Coding for dikes (special arcs) attributes:

NAME: FEATURE:

orig_label unmodified map unit symbols from source cover

sgmc_label orig_label modified for standard geologic age symbols and an

integer code added for province

arc-code unique integer identifier

dike_lith general lithology

dike_age geologic age

source reference to source of data

Entity_and_Attribute_Detail_Citation: ESRI

Distribution_Information:

Distributor:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization:

U.S. Geological Survey Information Services

Reston-ESIC

Contact_Address:

Address_Type: mailing and physical address

Address:

U.S. Geological Survey

507 National Center

City: Reston

State_or_Province: Virginia

Postal_Code: 20192

Country: USA

Contact_Voice_Telephone:

1-888-ASK-USGS

or

1-703-648-5953

Contact_Electronic_Mail_Address: http://www.usgs.gov/contact/

Distribution_Liability:

Any use of trade, product, or firm names is for

descriptive purposes only and does not imply endorsement by the USGS.

Although these data have been used by the USGS and have been
successfully

imported into data base programs, no warranty, expressed or implied, is
made

by the USGS as to how successfully or accurately the data can be
imported into

any specific application software running on any specific hardware
platform.

The fact of distribution shall not constitute any such warranty, and no

responsibility is assumed by the USGS in connection therewith.

This data base GIS is not meant to be used or displayed at any scale
other than 1:500,000.

Resource_Description:

Standard_Order_Process:

Digital_Form:

Digital_Transfer_Information:

Format_Name: ARC/INFO export

Format_Version_Number: 9.0

Format_Information_Content: Geologic units and structural features

File_Decompression_Technique: gzip and tar

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name: http://pubs.usgs.gov/

Fees: none

Metadata_Reference_Information:

Metadata_Date: 20050909

Metadata_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: U.S. Geological Survey

Contact_Person: Connie L. Dicken

Contact_Address:

Address_Type: mailing and physical address

Address: 12201 Sunrise Valley Dr. MS954

City: Reston

State_or_Province: VA

Postal_Code: 20192

Country: USA

Contact_Voice_Telephone: 703-648-6482

Contact_Electronic_Mail_Address: cdicken@usgs.gov

Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial
Metadata (\"CSDGM version 2\")

Metadata_Standard_Version: FGDC-STD-001-1998