Geologic Map of the Winslow 30' x 60' Quadrangle, 

Coconino and Navajo Counties, Northern Arizona

Tags

geologic map

Summary 

The geologic map of the Winslow quadrangle was prepared by the USGS Navajo Land Use 

Planning Project in cooperation with the Navajo Nation and funded through the USGS National 

Cooperative Geologic Mapping Program to provide connectivity to the regional geologic 

framework of the Grand Canyon area of northern Arizona. The Winslow quadrangle geologic map 

(sheets 1 and 2) will benefit local, state, federal, Navajo, and private land resource managers 

who direct environmental and land management programs such as range management, plant 

and animal studies, flood control, water resource investigations, and natural hazards associated 

with sand dune mobility. The geologic information will support ongoing and future geologic 

investigations and associated scientific studies within the Winslow quadrangle.

Description 

This digital map database represents the general distribution of bedrock and surficial deposits in 

the Winslow 30' x 60' quadrangle. The database delineates map units that are identified by 

general age and lithology following the stratigraphic nomenclature of the U.S. Geological Survey. 

The Winslow quadrangle encompasses approximately 5,018 km2 (1,960 mi2) within Coconino 

and Navajo Counties of northern Arizona and is bounded by longitude 110° to 111° W., and 

latitude 35° to 35°30' N. South of the Navajo Nation, private and State lands form a 

checkerboard pattern on the quadrangle. This digital database for the geologic map of the 

Winslow 30' x 60' quadrangle, Arizona, is a cooperative effort of the U.S. Geological Survey 

(USGS) and the Navajo Nation to provide regional geologic information for resource management 

officials and visitor information services of the Navajo Nation. Field work on the Navajo Nation 

was conducted with the cooperation of, and under written permit from, the Navajo Nation 

Minerals Department. All scientific study on the Navajo Nation requires a permit from the Navajo 

Nation Minerals Department, P.O, Box 1910, Window Rock, Arizona 86515, (928) 871-6587.

Credits 

This digital database was prepared by George Billingsley and Debra Block. Technical reviews 

were provided by Jonathan Matti of the U.S. Geological Survey and Michael Ort of Northern 

Arizona University. Digital review was provided by Sue Priest of the U.S. Geological Survey. 

Prepared in cooperation with the Navajo Nation.

Use limitations 

Not for use at scales greater than 1:24,000. Any derivative products utilizing these datasets shall 

clearly indicate their source. If users modify the data in any way they are obligated to describe 

the types of modifications they have performed. User specifically agrees not to misrepresent 

these datasets, nor to imply that changes they made were approved by the U.S. Geological 

Survey.

Extent

West -111.0 East -110.0

North 35.5 South 35.0

Scale Range

Maximum (zoomed in) 1:24,000

Minimum (zoomed out) 1:100,000
ArcGIS Metadata ►

Topics and Keywords ►

THEMES OR CATEGORIES OF THE RESOURCE geoscientificInformation

CONTENT TYPE Downloadable Data 

EXPORT TO FGDC CSDGM XML FORMAT AS RESOURCE DESCRIPTION No

PLACE KEYWORDS Winslow, USA, Arizona, Navajo County, Navajo Nation Reservation, Coconino 

County, Colorado Plateau 

THESAURUS ►

TITLE U.S. Board on Geographic Names 

ALTERNATE TITLES http://geonames.usgs.gov/index.html

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THEME KEYWORDS geologic map 

THESAURUS ►

TITLE USGS Thesaurus 

ALTERNATE TITLES http://www.usgs.gov/science/tab-term.html

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Citation ►

TITLE Geologic Map of the Winslow 30' x 60' Quadrangle, Coconino and Navajo Counties, 

Northern Arizona

EDITION 1.0

PRESENTATION FORMATS digital map 

FGDC GEOSPATIAL PRESENTATION FORMAT vector digital data

SERIES

NAME U.S. Geological Survey Scientific Investigations Map 

ISSUE SIM 3247

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Citation Contacts ►

RESPONSIBLE PARTY

INDIVIDUAL'S NAME George H. Billingsley 

CONTACT'S ROLE originator
RESPONSIBLE PARTY

INDIVIDUAL'S NAME Debra Block 

CONTACT'S ROLE originator

RESPONSIBLE PARTY

INDIVIDUAL'S NAME Margaret Hiza Redsteer 

CONTACT'S ROLE originator

RESPONSIBLE PARTY

ORGANIZATION'S NAME U.S. Geological Survey 

CONTACT'S ROLE publisher

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Resource Details ►

DATASET LANGUAGES English 

DATASET CHARACTER SET utf8 - 8 bit UCS Transfer Format

STATUS completed 

SPATIAL REPRESENTATION TYPE vector

SPATIAL RESOLUTION

DATASET'S SCALE

SCALE DENOMINATOR 50000

SUPPLEMENTAL INFORMATION

Although the nominal scale of a USGS 30' x 60' topographic quadrangle is 1:100,000, 

we present the geologic map of the Winslow quadrangle in two panels at the 

1:50,000-scale in order to preserve geologic features that were mapped and 

compiled at the 1:24,000-scale, but are too detailed to show at the 1:100,000-scale. 

For map plotting purposes and readability, we present the geologic map as west 

(sheet 1) and east (sheet 2) panels, each consisting of sixteen 7.5' quadrangles. A 

third map sheet contains a Correlation of Map Units, a List of Map Units, and an 

explanation of map symbols that is applicable to both map sheets. The accompanying 

style file (SIM3247.style) contains the symbols applied to each feature class in 

ArcMap to create the cartographic map.

CREDITS

This digital database was prepared by George Billingsley and Debra Block. Technical 

reviews were provided by Jonathan Matti of the U.S. Geological Survey and Michael 

Ort of Northern Arizona University. Digital review was provided by Sue Priest of the 

U.S. Geological Survey. Prepared in cooperation with the Navajo Nation.

ARCGIS ITEM PROPERTIES

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Extents ►

EXTENT

DESCRIPTION

ground condition

GEOGRAPHIC EXTENT

BOUNDING RECTANGLE

EXTENT TYPE Extent used for searching 
WEST LONGITUDE -111.0 

EAST LONGITUDE -110.0 

NORTH LATITUDE 35.5 

SOUTH LATITUDE 35.0 

EXTENT CONTAINS THE RESOURCE Yes

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Resource Points of Contact ►

POINT OF CONTACT

INDIVIDUAL'S NAME George H. Billingsley 

ORGANIZATION'S NAME U.S. Geological Survey 

CONTACT'S POSITION Emeritus Geologist 

CONTACT'S ROLE principal investigator

CONTACT INFORMATION ►

PHONE

VOICE 928-557-7198 

FAX 928-556-7169

ADDRESS

TYPE both 

DELIVERY POINT 2255 N. Gemini Dr. 

CITY Flagstaff 

ADMINISTRATIVE AREA AZ 

POSTAL CODE 86001 

COUNTRY US 

E-MAIL ADDRESS gbillingsley@usgs.gov

ONLINE RESOURCE

LOCATION http://pubs.usgs.gov/sim/3247

FUNCTION PERFORMED download

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Resource Maintenance ►

RESOURCE MAINTENANCE

UPDATE FREQUENCY not planned

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Resource Constraints ►

CONSTRAINTS

LIMITATIONS OF USE

Not for use at scales greater than 1:24,000. Any derivative products utilizing these 

datasets shall clearly indicate their source. If users modify the data in any way they 

are obligated to describe the types of modifications they have performed. User 
specifically agrees not to misrepresent these datasets, nor to imply that changes they 

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

LEGAL CONSTRAINTS

LIMITATIONS OF USE

The U.S. Geological Survey (USGS) provides these geographic data "as is." The USGS 

makes no guarantee or warranty concerning the accuracy of information contained in 

the geographic data. The USGS further makes no warranties, either expressed or 

implied as to any other matter whatsoever, including, without limitation, the 

condition of the product, or its fitness for any particular purpose. The burden for 

determining fitness for use lies entirely with the user. Although these data have been 

processed successfully on computers at the USGS, no warranty, expressed or 

implied, is made by the USGS regarding the use of these data on any other system, 

nor does the fact of distribution constitute or imply any such warranty. In no event 

shall the USGS have any liability whatsoever for payment of any consequential, 

incidental, indirect, special, or tort damages of any kind, including, but not limited to, 

any loss of profits arising out of use of or reliance on the geographic data or arising 

out of delivery, installation, operation, or support by USGS.

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Data Quality ►

SCOPE OF QUALITY INFORMATION ►

RESOURCE LEVEL dataset

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DATA QUALITY REPORT - QUANTITATIVE ATTRIBUTE ACCURACY ►

MEASURE DESCRIPTION The geodatabase was checked for polygon adjacency. Validation tests 

determined that lines attributed as 'Contact' do not separate equivalent map units and lines 

attributed as 'Fault - Concealed' do not separate different map units. 

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DATA QUALITY REPORT - CONCEPTUAL CONSISTENCY ►

MEASURE DESCRIPTION Topological integrity of the data is maintained in the geodatabase by the 

following rules: geologic lines 1) must not self-overlap, 2) must not self-intersect, 3) must 

not have pseudonodes, 4) must not intersect or touch interior, 5) must be single part, and 

6) must not have dangles [excepting faults]; geologic polygons 1) must not overlap, 2) 

must not have gaps, and 3) boundary must be covered by [geologic lines]. These 

topological relationships reflect the geometric relationship of geologic entities. Each line 

segment has a length and directionality that is appropriate for the geologic feature it 

depicts. 

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DATA QUALITY REPORT - COMPLETENESS OMISSION ►
MEASURE DESCRIPTION This map is designed to describe completely the surficial and bedrock 

geology at a 1:24,000 scale. Geologic information only mappable at a larger scale has been 

omitted. All geospatial database elements are attributed. 

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DATA QUALITY REPORT - ABSOLUTE EXTERNAL POSITIONAL ACCURACY ►

MEASURE DESCRIPTION The positional accuracy of the location of the geologic contacts and faults 

varies as a function of topography and geology. Contacts and faults that occur in bedrock in 

moderate terrain are considered to be accurately located, and within +/- 5 meters of their 

actual location on the topographic base map. This accuracy diminishes in areas where the 

topography is either flat or very steep. Contacts between surficial units are often difficult to 

discern, and are considered to be approximately located, despite being attributed as 

accurately located. The 1:24,000 topographic maps and corresponding Digital Raster 

Graphics (DRGs) that were used as the primary mapping base for this project were 

assumed to meet the National Map Accuracy Standard of +/- 12 meters. The scanned 

source maps, which were georeferenced to the DRGs, all had registration errors of less than 

+/- 12 meters, and most had errors of less than +/- 5 meters. 

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Lineage ►

PROCESS STEP ►

DESCRIPTION The geologic map of the Winslow quadrangle was produced by stereoscopic 

analysis of aerial photographs, augmented by extensive field checking. Primary resources 

include color aerial photographs flown in 2004, 2005, and 2006, at the 1:24,000-scale, and 

flown in 2005 at the 1:40,000-scale. The geologic linework originally was compiled onto 

1:24,000-scale paper USGS topographic maps. The 32 draft paper maps were scanned and 

georeferenced to the corresponding 7.5' topographic map digital raster graphic (DRG) in

ArcGIS. Geologic features were digitized and symbolized from the field sheets, and 

additional field checks were performed where needed. 

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PROCESS STEP ►

DESCRIPTION Many of the Quaternary alluvial and eolian deposits have similar lithologic and 

geomorphic characteristics and were mapped almost entirely by photogeologic methods. 

Pliocene(?), Pleistocene, and Holocene surficial deposits were differentiated chiefly on the 

basis of differences in morphologic character and physiographic position as observed on 

color aerial photographs and in the field. Older alluvial and eolian deposits are significantly 

eroded, whereas younger deposits are only slightly eroded and are actively accumulating 

material. Surficial unit contacts that are adjacent to alluvial, eolian, and bedrock map units 

are approximate. 

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PROCESS STEP ►

DESCRIPTION The channel of the Little Colorado River was mapped by stereo photograhic 

methods using 2005 color digital orthophoto quadrangles (DOQs) and drawn on 1979 and 

1986 1:24,000-scale USGS topographic base maps. The present-day (2005) river channel 

morphology does not match that depicted on the 1979 and 1986 topographic base maps 

because of changing geomorphic conditions of the Little Colorado River.

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Distribution ►

DISTRIBUTOR ►

CONTACT INFORMATION

ORGANIZATION'S NAME USGS Information Services 

CONTACT'S ROLE distributor

CONTACT INFORMATION ►

PHONE

VOICE 1-888-ASK-USGS

ADDRESS

TYPE postal 

DELIVERY POINT Box 25286 Denver Federal Center 

CITY Denver 

ADMINISTRATIVE AREA CO 

POSTAL CODE 80225 

COUNTRY US 

E-MAIL ADDRESS ask@usgs.gov

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TRANSFER OPTIONS

ONLINE SOURCE

LOCATION http://pubs.usgs.gov/sim/3247

FUNCTION PERFORMED download

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Fields ►

OVERVIEW DESCRIPTION ►
ENTITY AND ATTRIBUTE OVERVIEW This geodatabase contains the feature dataset 'geo' which 

contains line and polygon feature classes that collectively define the geologic units. 

Additional feature classes within the geodatabase contain volcanic, karst, and geologic 

structure data. Each feature class has a corresponding metadata report that should be 

referred to for additional Data Quality, Spatial Reference, and Entity and Attribute 

information. 

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OVERVIEW DESCRIPTION ►

ENTITY AND ATTRIBUTE OVERVIEW This geodatabase, SIM3247.mdb, includes the following:

geo (feature dataset),

SIM3247_line (feature class containing geologic contacts and faults),

SIM3247_poly (feature class containing geologic unit polygons),

SIM3247_atd (feature class containing geologic structure data),

SIM3247_fold (feature class containing fold axes),

SIM3247_kar (feature class containing karst data),

SIM3247_sym (feature class containing line ornamentation for faults),

SIM3247_vpf (feature class containing volcanic point data),

SIM3247_DRG24k (raster catalog of topographic base maps)

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Metadata Details ►

METADATA LANGUAGE English 

METADATA CHARACTER SET utf8 - 8 bit UCS Transfer Format

SCOPE OF THE DATA DESCRIBED BY THE METADATA dataset

ARCGIS METADATA PROPERTIES

METADATA FORMAT ArcGIS 1.0 

METADATA STYLE FGDC CSDGM Metadata 

STANDARD OR PROFILE USED TO EDIT METADATA FGDC

CREATED IN ARCGIS FOR THE ITEM 2013-02-04 10:29:30 

LAST MODIFIED IN ARCGIS FOR THE ITEM 2013-02-06 10:51:51

AUTOMATIC UPDATES

HAVE BEEN PERFORMED No

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Metadata Contacts ►

METADATA CONTACT

INDIVIDUAL'S NAME Debra Block 

ORGANIZATION'S NAME U.S. Geological Survey 

CONTACT'S POSITION Geologist 
CONTACT'S ROLE originator

CONTACT INFORMATION ►

PHONE

VOICE 928-556-7138 

FAX 928-556-7169

ADDRESS

TYPE both 

DELIVERY POINT 2255 N. Gemini Dr. 

CITY Flagstaff 

ADMINISTRATIVE AREA AZ 

POSTAL CODE 86001 

COUNTRY US 

E-MAIL ADDRESS dblock@usgs.gov

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Metadata Maintenance ►

MAINTENANCE

UPDATE FREQUENCY not planned

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