Printed on recycled paper

Water-Level Difference for the Sparta-Memphis Aquifer

in Arkansas from 2007 to 2011

By

T.P. Schrader

2014

94° 93° 92°

91°

90°

36°

35°

34°

94°

93°

92°

91°

90°

36°

35°

34°

CLAY

GREENE

MISSISSIPPI CRAIGHEAD

JACKSON

POINSETT

WHITE CROSS CRITTENDEN

WOODRUFF

ST. FRANCIS

LEE

PRAIRIE

MONROE

PULASKI

SALINE

LONOKE

HOT SPRING

GRANT

JEFFERSON

ARKANSAS

PHILLIPS

CLARK

DALLAS

CLEVELAND LINCOLN

DESHA

DREW

CHICOT

ASHLEY

CALHOUN BRADLEY

NEVADA OUACHITA

MILLER

LAFAYETTE

COLUMBIA

UNION

Area of outcrop of the Sparta Sand (modified from Hosman, 1982; 

 Hosman and others, 1968)

Zone of transition where Cane River Formation of Claiborne

 Group or equivalents change facies from clay to sand—Marks 

 southern limit of Memphis aquifer (Hosman and others, 1968)

Western limit of the Sparta-Memphis aquifer

Well completed in Sparta-Memphis aquifer—Value is rise in 

 water-level measurements from 2007 to 2011, in feet. Symbols

 are scaled to value. Smallest positive value increasing to 

 largest positive value

Well completed in Sparta-Memphis aquifer—Value is decline in

 water-level measurements from 2007 to 2011, in feet. Symbols

 are scaled to value. Smallest negative value increasing to 

 largest negative value

Well completed in Sparta-Memphis aquifer—No difference in

 water-level measurements from 2007 to 2011, in feet

EXPLANATION

*

15.5

! 0.0

* -15.7

TENNESSEE

MISSISSIPPI

ARKANSAS

LOUISIANA

MISSOURI

TEXAS

ARKANSAS

0 10 20 30 40 MILES

0 10 20 30 40 KILOMETERS

Base from U.S. Geological Survey digital data, 1:100,000

Universal Transverse Mercator projection, zone 15

North American Datum of 1927

Prepared in cooperation with the

Arkansas Natural Resources Commission 

and the

Arkansas Geological Survey

U.S. Department of the Interior

U.S. Geological Survey

Scientific Investigations Report 2014–5044

Water-level difference, Sparta-Memphis aquifer, from 2007 to 2011—PLATE 2

Schrader, T.P., 2013, Water levels and water-quality in the Sparta-Memphis aquifer

(Middle Claiborne aquifer) in Arkansas, spring–summer 2011

!

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3.1

6.8

3.2 0.6

1.8

5.7

1.3

1.2 1.8

9.1

4.3

0.2 0.6

4.1

0.4

5.3

0.1

6.8

8.4

8.5

2.4 6.4

3.3

0.7

5.9

3.6 0.1

2.4

5.1 1.5

2.4

1.7

3.8

1.7

1.3

5.1

3.4

3.2

1.8 0.7

0.9

2.7

6.6 8.5

0.1

6.1 6.1 4.7

9.1

2.2 2.0 8.8

4.5

0.1

2.6

0.5

1.8

0.1 0.4

2.6

4.9

4.1

5.9

5.1

2.9 2.5

2.7

5.5

2.1

3.5 8.0

2.4

1.1 8.1

2.0 2.2 2.0 2.7

0.7

2.2

4.1

8.8

4.3

1.3

1.4

2.0

6.4

5.4

0.7

9.8

3.1

0.8

4.0

2.6 4.0

3.6 4.6 3.5

7.2 3.4

3.1

2.7

5.8 1.1 3.8

3.3

2.5

9.4

3.5

5.0

1.5

2.6

1.2

17.7

45.4 33.1

41.9

27.5 21.9

18.0 19.7 15.8 18.9

14.5 19.3 20.7

31.0

18.8

16.1

19.8

37.4 42.8

10.7

10.3

39.4

11.2

16.4

10.2

15.5

10.3 16.4

19.5

22.2

39.1

18.5

27.0

14.3

12.2

12.2

41.9

23.9

19.3

10.3 10.8

10.6

0.0

0.0

-3.0

-0.5

-1.7

-5.1

-1.2

-7.8 -5.9

-0.2

-1.2

-2.1 -2.5

-2.1

-4.0

-1.3

-2.5 -3.5

-2.6

-0.6

-5.0

-2.2

-2.1

-3.1

-4.0

-2.2

-0.1

-0.2

-0.7

-2.2

-2.8

-0.4

-5.9 -3.8

-0.1

-0.5

-5.2

-0.1

-1.6

-2.8 -1.7

-1.3

-3.7

-1.3

-5.0

-4.4

-4.2

-6.0

-1.6

-6.8 -9.2

-0.5

-0.2

-0.2

-1.1

-0.5

-0.1 -1.1

-2.4

-1.4

-2.4

-4.9 -2.7 -2.1 -0.3

-2.0

-2.1

-1.2 -0.9

-4.4

-0.4

-2.4 -1.6

-8.5

-3.7

-0.2

-0.6 -1.5

-5.2

-0.7

-7.1

-3.6 -6.5

-1.9

-8.8

-0.4

-6.3

-4.4

-17.3

-15.7

-10.1

-13.9