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GEOREF RECORD

Stratigraphy and metamorphism in a part of the northern Black Hills and the Homestake Mine, Lead, South Dakota

James Alexander Noble and James Otto Harder
Stratigraphy and metamorphism in a part of the northern Black Hills and the Homestake Mine, Lead, South Dakota
Bulletin of the Geological Society of America (September 1948) 59 (9): 941-975

Abstract

The pre-Cambrian rocks of the northern Black Hills which have been mapped and studied by the staff of the Homestake Mining Company comprise sedimentary formations with a total stratigraphic thickness of about 20,000 feet. The oldest formations, the Poorman and Homestake, are dominantly ankeritic carbonate and iron-magnesium carbonate respectively. The younger formations, the Ellison, Northwestern, Grizzly, and Flag Rock, are dominantly argillaceous rocks with some quartzites and other rock types. Pre-Cambrian intrusive rocks, originally gabbroic, cut the pre-Cambrian sedimentary rocks; and the whole succession is overlain unconformably by the Cambrian Deadwood formation, and everything is cut by Tertiary intrusive rocks.


ISSN: 1050-9747
Coden: BUGMAF
Serial Title: Bulletin of the Geological Society of America
Serial Volume: 59
Serial Issue: 9
Title: Stratigraphy and metamorphism in a part of the northern Black Hills and the Homestake Mine, Lead, South Dakota
Pages: 941-975
Published: 194809
Text Language: English
Publisher: Geological Society of America (GSA), Boulder, CO, United States
Accession Number: 1949-012517
Categories: Areal geology
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. geol. map
N44°08'60" - N44°36'00", W104°04'00" - W103°27'00"
Source Note: reprinted in Black Hills Eng., p. 2-19, Jan. 1949.
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2019, American Geosciences Institute. Reference includes data from Bibliography and Index of North American Geology, U. S. Geological Survey, Reston, VA, United States
Update Code: 1949
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