Structural Contour Map, Top of Deadwood Formation, Piedmont Quadrangle By

(D A.L. Lisenbee, A.D. Davis, M.H. Price, and K.M. Grigg E A D M ) A E N 2012 S M E O D U A N E T M A T IN o 27'30" o R ) 103 30' 6 000m. 6 6 6 (TILFORD) 6 6 6 6 6 O 20 E. 21 22 R. 5 E. R. 6 E. 24 25 26 25' 27 28 29 103 22'30" (F o 44 15' o 0 4 510 8 44 15' 0 00 0 49 1 6 E 0 l 0 00 k 38 1 7 4 0 4 0 4 0

8 3 1 0 6 5 4 2 0 4200 31 0 8 49 000m. 0 00 N. 0 0 0 1 4 5 9 8 3 0 3 0 k 0 V 6 0 ree 0 46 T 0 C 0 00 0 2 4 49 0 3 0 00

0 H 2 3 1 5 0 0 0 3 9 0 0 2 51 4 0 2 00 3 0 35 0 0 00 4 0 5

0

0 3 V 4 0 00 4 0 9 4 3 3 3 6 0 7 00 0 0 Qal 0 3 3 2 3 3 0 1 5

4 0 420 0 0 0 0

9 0 0 4 0 7 0 4 4

0 T 0 3 0 0 8 4 48 4 0 0 0 99 7 6 49 0 0 0 00 0 0 4 4 5 4 2 0 0 3 0 0 0 10 0 12 7 8 9 2 0 10 48 11 OCd 0 4 6 4 0 99 4 7 0 0 A q u i f e r 0 2 A q u i f e r 5 0 4 0 4 2 0 6 0 0 Dalton Lake 0 4 49 1 00 0 2 0 7 0 0 36 Qal 4 00 4 50 700 0 R e c h a r g e 0 50 2 4 8 00 T 0 46 0 2 9 48 0 98 47 0 3 00 4900 3 9 0 0 3 F 0 0 50 4900 0 0 0

0

4 4 4898 A r e a 4 4 8 800 0 Spring 0 36 00

0

0

6

M 4 V 3800 0

0 0 47 5 00 Spring 3 18 16 800 5 17 15 14 0 13 Spring 0 15 0 4 5 0 49 0 00 4897 OCd 45 48

4 F 0 97 9 0 4 5 200 4 0 0 1 0 0 44 0 0 00 0 0 80 44 3 0 0

3 0 3 0 1 0 Sp 3 ring 0 3 2 0 3 0

3 0 0 4 0 0 3 OCd 80 0 4 M 5 0

0 0 0 450 4 4 48 Spring 0 96 0

12' 30" 4 12' 30" 0 1 4 0 0 8 9 0 0 4 4 48 0 9 0 96 0 M 22 23 24 19 20 21 22 Spring 3 6 0 3 0 4 3 7 7 4 3 8 0 2 0 00 0 4 0 0 45 4 9 0 0 8 3 4 0 0 0 0 0 0 0 0 0 0 0 0 51

4 8 0 0 0 48 00 95 4 48 00 00 5100 48

4895 0 0 46 4500

4 52 1 0 0 0 0 4 9 0 4 4 0 7 8 4 0 0 4 4 4 0 4 0 4 5 3

5 4 0 2 6 5 8 0

0 4 7 0 0 0 0 0 0 9 0 0 0 4 0 70 0 0 0 0 0 0

0 ( B L

5 48 A 27 0 26 25 30 29 28 27 94 C

0

0 K ) H

4 4 A O 8 4 48

0 0 4 W M 94 0 0 2

E 0 K 0 N 47 440 ) ( 00 0

0

0

6

4 4 00 90 5 0 43 0 0 0 0 7 0 4

Spring

49 00 4893 4600 0 4 0 7 4 0 4

0 48 0 Spring

0 93 4

4 8 9 8 4 4 0 8 0

0 0 0 0

5 1 0

0 4

2

0 0 34 35 36 31 32 33 34

0 0 4 4 k B e ox re e ld 4600 4 48 C e 6

92 r 0

0 0 0 4 0 50 4 5 0 0 60 0 0 47 48 s 0 92 e 0 t 6 T. 3 N. s 4 E T. 3 N.

T. 2 N. T. 2 N.

0 0 0 0 4 0 4 0 4 5 7 6 4 4 0 OCd 4 7 10' 0 0 10' 0

0

0

6 4 0 50 4891 4 48 M 0 0 48 3 2 1 6 5 4 3 91 OCd 0 0 4800 9 Qal 4 4400 F

4700 OCd 4500 OCd C 4800 re OCd 4 e 0 5 k OCd 60 0 0 OCd 4 0 0 5 4 OCd 4890 Qt1 4 4 OCd 0 Qc 0 4600 4800 4 48 Cre 7 90 ek 0 0 0 Qt1 40 45 4 4 00 4 8 9 0 0 0 4 0 3 4 0 8 0 440 00 OCd 0 OCd OCd 4 430 5 0 39 0 0 0 0 0 0 4 4 700 OCd 4 10 10 11 8 9 0 Jim 12 7 0 4 4 48 37 89 00 4 8 4 4 0 5 2 0 0 OCd 0 0 0 0 45 0 Qt 4 OCd 3 48 0 89 0

46 0 4 0 4400 0 0 1 2 4 0 300 4 00 0 44 4 A q u i f e r 4 A q u i f e r Qt 4 0 3 Q 0 0 0 c 3

6

4 4 0 7 6 0 4 0 0 N 8 4 0 8 0 0 o 0 0 r R e c h a r g e 0 4 R e c h a r g e 5 th 45 00 0 50 4600 0 00 4 4 48 9 20 4 4 88 0 4 4 0 8 0 0 0 5 0 OCd 0

0 0 B 4 o 8 A r e a 5 x 0 0 e 48 0 t B 0 ld t 4400 88 Q 4 o 0 e Q 3 Qal 0 g 5000 r 5 0 u Qt 0 0 s 0 49 00 44 15 14 13 18 00 17 16 15 4 Q 4300 4 60 t

Jim 7 0 0 C 0 OCd Qal r e e ek Q Boxelder le B k re idd og C t M us Qc 0 Gr 0 avel J Qc l eek im 2 Cr

OCd a 4 Cr 4 Spring ee 4600 6 48 k Q 0 4 0 4 4 87 7 0 0 2 0 Q Doty Spring 3 0 0 1 0

J 0 0 Bogus im 4

t 0 0

0 2

4 0 90 4 0 5 Q 4400 4 c 4800 4887000m.N. o Creek o 44 07' 30" OCdQal 44 07' 30" 6 6 6 6 6 6 6 6 000m. o 21 22 23 25 26 27 28 29 E. o ) 103 30' 27'30" R. 5 E. R. 6 E. 25' 103 22'30" (R Y A T (PACTOLA DAM) P I I C D R C E IT V Y IL S Map base modified from U.S.G.S. 1:24,000-scale Piedmont digital line graph. W ( NORTH E REFERENCE SCALE 1:24,000 S Geology layer from J.A. Redden, 2006. T 1 0.5 0 1 ^ ) Water well data digitized from SD Dept. Miles of Environment & Natural Resources "Online Oil/Gas/Injection Well Data" database. MN GN South Dakota Projection is Universal Transverse Mercator, Zone 13, North American Datum 1983. 1,000 0 1,000 2,000 3,000 4,000 5,000 6,000 7,000 Digital Cartography: K.M. Grigg and N. Toth, 2012. Feet

o Department of Geology and Geological Engineering 1 0.5 0 1 13 Kilometers o South Dakota School of Mines and Technology 1 10' 231 MILS TOPOGRAPHIC CONTOUR INTERVAL 20 FEET 21 MILS Quadrangle location (IF SHOWN) The preparation of this map was financed by the West Dakota Water Development

District in association with the Department of Geology and Geological Engineering UTM GRID AND 1971 MAGNETIC NORTH South Dakota School of Mines and Technology. DECLINATION AT CENTER OF SHEET

EXPLANATION Geologic Units Structural Contours Trail Contact Solid where location certain; dashed where Quaternary Floodplain Surficial Deposits Structural contours mark lines of equal elevation Unimproved Road approximately located. Qal Includes alluvium (Qal) deposits. of the top of a geological formation. The contours Increased potential for infiltration of water.

Paved Road H F Anticline help to define unseen folds and faults present below Showing crestline and direction of plunge. Other Surficial Deposits the land surface. Dashed where projected above Highway Solid where location certain; dashed where Qt Includes colluvium (Qc) and terrace (Qt) deposits. approximately located. Decreased potential for infiltration of water. surface. Number indicates elevation above sea level. Interstate Disconformity H M Syncline Showing troughline and direction of plunge. Solid where location certain; dashed where Ordovician Railroad approximately located. Deadwood Formation - Recharge Area Cambrian OCd Brown to brownish-red sandstone and grey shale and 3400 Structural Contour on top edgewise pebble conglomorate (with green glauconite). Lake Monocline - Anticlinal bend of Deadwood Formation T Axis located on steepest part of structure.

Intermittent Stream Deadwood Formation Absent Structural Contour Interval 100 feet Perennial Stream V Monocline - Synclinal bend Axis located on steepest part of structure. Black Hills National Forest Boundary Deadwood Formation Present in Subsurface