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Mineral Resources On-Line Spatial Data

Gravel Deposits

Clay to boulder-size clasts primarily from igneous and metamorphic rocks of the central Black Hills. Also includes Phanerozoic lithic clasts and rare vertebrate fossils. Thickness up to 60 ft (18 m).
StateSouth Dakota
NameGravel Deposits
Geologic agePhanerozoic | Cenozoic | Tertiary
Original map labelTg
Primary rock typeclay or mud
Secondary rock typesilt
Other rock typessand; gravel
Lithologic constituents
Major
Sedimentary > Clastic > Conglomerate (Bed)
Map references
Martin, J. E., Sawyer, J. F., Fahrenbach, M. D., Tomhave, D. W., and Schulz, L. D., 2004, Geologic Map of South Dakota: South Dakota Geological Survey
Unit references
Martin, J. E., Sawyer, J. F., Fahrenbach, M. D., Tomhave, D. W., and Schulz, L. D., 2004, Geologic Map of South Dakota: South Dakota Geological Survey
Geographic coverageCuster - Fall River - Jackson - Pennington - Shannon

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URL: http://mrdata.usgs.gov/geology/state/sgmc-unit.php?unit=SDTg;0
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