U.S. Department of the Interior

U.S. Geological Survey

Prepared in cooperation with the

Virginia Department of Environmental Quality

Scientific Investigations Report 2017–5041

PLATE 2 of 2

McFarland, E.R., 2017, Hydrogeologic Framework and Hydrologic Conditions of the Piney Point Aquifer in Virginia

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Altitude, in feet relative to the National Geodetic Vertical Datum of 1929Altitude, in feet relative to the National Geodetic Vertical Datum of 1929

Fault

Fault

Off scale

Off scale

Off scale

Off scale

56L 5

56J 30

56H 39

OWENS ILLINOIS

58N 7

57M 7

HAYNESVILLE 58N 4

56J 16 56G 79 56F 16

56F 61

JAMESTOWN

56G 61

Calvert Formation, Plum Point Member

Calvert Formation, Newport News unit and basal Plum Point Member

Old Church Formation

Piney Point Formation

Nanjemoy Formation, Woodstock Member

Nanjemoy Formation, Patapaco Member

SECTION

B–B'

SECTION

A–A'

C C'

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Altitude, in feet relative to the National Geodetic Vertical Datum of 1929

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Chickahominy Formation

Altitude, in feet relative to the National Geodetic Vertical Datum of 1929

Exmore tsunamibreccia

Resurge channel

Fault

Fault

Off scale

58J 5

59K 35

59K 17

56J 11

58J 11

56J 30

56H 46

55H 23

WINDSOR SHADES

60K 20

54G 10

59K 36

WEEMS #3A

Calvert Formation, Plum Point Member

Calvert Formation, Newport News unit and basal Plum Point Member

Old Church Formation

Piney Point Formation

Nanjemoy Formation, Woodstock Member

Nanjemoy Formation, Patapaco Member

SECTION

C–C'

B B'

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Altitude, in feet relative to the National Geodetic Vertical Datum of 1929

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Altitude, in feet relative to the National Geodetic Vertical Datum of 1929

Off scale

60L 21

60L 22

SURPRISE HILL

59M 8

58M 6

LOTTSBURG #3

59M 7

57M 7

HAYNESVILLE

56M 9

55N 2

54N 2

Calvert Formation, Plum Point Member

Calvert Formation, Newport News unit and basal Plum Point Member

Old Church Formation

Piney Point Formation

Nanjemoy Formation, Woodstock Member

Nanjemoy Formation, Patapaco Member

Oligocene-age sediments

Gosport Formation equivalent sediments

Oligocene-age sediments

Gosport Formation equivalent sediments

A A' SECTION C–C'

EXPLANATION

Borehole resistivity log—Heading in red indicates lithologiccontrol fromcore

and in blue fromdetailed cuttings descriptions.Heading in black indicates

only driller’s log or no lithologic informationavailable

Coarse grained

Coarse grained

60L 22

SURPRISE HILL

Borehole local number

Site name

Borehole interval

Lithologic contact

Resistivity curve

Fine grained

Fine grained

Fine grained

Fine grained

Coarsening upward

Coarse grained with cemented intervals

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5 10

5 MILES

0 KILOMETERS

0 10

5 10

5 MILES

0 KILOMETERS

0 10

5 10

5 MILES

0 KILOMETERS

VERTICAL SCALE GREATLY EXAGGERATED

VERTICAL SCALE GREATLY EXAGGERATED

VERTICAL SCALE GREATLY EXAGGERATED

Increasing

resistivity

Location of hydrogeologic sections

James River

York River

P O T O M A C R I V E R

Rappahannock River

C

H

E

S

A

P

E

A

K

E

B

A

Y

CAROLINE

COUNTY

HANOVER

COUNTY

SURRY COUNTY

ESSEX

COUNTY

KING AND QUEEN

COUNTY

YORK

COUNTY

NEW KENT COUNTY

KING WILLIAM

COUNTY

RICHMOND

COUNTY

PRINCE GEORGE

COUNTY

GLOUCESTER

COUNTY

CHARLES CITY

COUNTY

KING GEORGE

COUNTY

MIDDLESEX

COUNTY

LANCASTER COUNTY

MATHEWS

COUNTY

City of

Poquoson

City of

Hopewell

City of

Williamsburg

NORTHUMBERLAND COUNTY

City of

Newport News

HENRICO

COUNTY

JAMES CITY

COUNTY

WESTMORELAND

COUNTY

WEST POINT

Chesapeake

Bay impact

crater

A

A'

B

B'

C

C'

LIMIT

OF PINEY POINT A

Q

UIFER

77°15' 77° 76°45' 76°30' 76°15'

38°15'

38°

37°45'

37°30'

37°15'

MARYLAND

VIRGINIA

0 8 16 MILES

0 8 16 KILOMETERS

EXPLANATION

Extent of productive limestone

Line of hydrologic section

Well and identifier—Red indicates lithologic 

control from core, blue indicates lithology 

from detailed cuttings descriptions, and 

black indicates either only driller’s log or 

no lithologic information available 

Base fromU.S. Geological Survey, 1973

State of Virginia, 1:500 000

A A'

54N 2

Area of detail

VIRGINIA

59M 7

58N 7

58N 4

58M 6

58J 11

58J 5

57M 7

56M 9

56J 30

56J 16

56H 46 56J 11

56H 39

56F 61

55N 2

54G 10

54N 2

56L 5

59M 8

60L 21

56F 16

56G 79

56G 61

55H 23

60L 22

60K 20 59K 35

59K 17

59K 36

Hydrogeologic Sections A–A’, B–B’, and C–C’ of the Piney Point Aquifer in Virginia

By

E. Randolph McFarland

2017