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National Geologic Map Database

Geologic Unit: Deadwood

Usage:

Deadwood Formation (SD*,WY*, and subsurface of MT*,NE*,ND*,Canada)


Geologic age:

Cambrian to Early Ordovician*


Type section, locality, area and/or origin of name:

Type locality stated to be in Whitewood Canyon, just outside of town of Deadwood, in secs. 13 and 14, T. 5 N., R. 3 E., [Deadwood North 7.5-min quadrangle], Lawrence Co., western SD (Butler and others, 1955).
Type locality: on west side of Whitewood Creek just below Deadwood, Lawrence Co., western SD.
[See Jaggar, 1901, USGS 21st Ann. Rpt., Pt. 3, p. 176; Darton, 1901, USGS 21st Ann. Rpt., Pt. 4, p. 505; Darton, 1904, GSA Bull., v. 15, p. 382, pl. 24 (typical exposure); Darton, 1909, USGS Prof. Paper 65, p. 14 (measured section), pl. 5; Darton and Paige, USGS Geol. Atlas of the US, Central Black Hills folio, no. 219, p. 6; Furnish and others, 1936, GSA Bull., v. 20, no. 10, p. 1329-1341.]


AAPG geologic province:

Bighorn basin*
Chadron arch*
Denver basin*
Powder River basin*
Williston basin*


For more information, please contact Nancy Stamm, Geologic Names Committee Secretary.

Asterisk (*) indicates published by U.S. Geological Survey authors.

"No current usage" (†) implies that a name has been abandoned or has fallen into disuse. Former usage and, if known, replacement name given in parentheses ( ).

Slash (/) indicates name does not conform with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005). This may be explained within brackets ([ ]).