Ordovician and older rocks of the Bayhorse area, Custer County, Idaho
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Ordovician and older rocks of the Bayhorse area, Custer County, Idaho by S. W. Hobbs

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Published by Dept. of the Interior, U.S. Geological Survey in Denver, Colo .
Written in English


  • Geology, Stratigraphic -- Ordovician,
  • Geology -- Idaho -- Custer County

Book details:

Edition Notes

Statementby S.W. Hobbs and W.H. Hays
SeriesU.S. Geological Survey bulletin -- 1891
ContributionsHays, William Henry, 1922-
The Physical Object
Paginationv, 40 p.
Number of Pages40
ID Numbers
Open LibraryOL14971123M

Download Ordovician and older rocks of the Bayhorse area, Custer County, Idaho


The Beaverhead meteorite impact was first recognized in (Hargraves et al., ), when shatter cones were found in Prot– erozoic rocks in the Beaverhead Mountains, near Medicine Lodge Creek in southwest Montana (Fig. 1).Because the Proterozoic rocks were known to be allochthonous, the search for the impact area, and for other pieces of fragmented, . Similar Items. Stratigraphy and structure of Middle and Upper Ordovician rocks in the Sedgwick Basin and adjacent areas, south-central Kansas / by: Adkison, W. L., Published: () Ordovician and older rocks of the Bayhorse area, Custer County, Idaho / by: Hobbs, S. W. , et al. Published: (). B / Ross, C. P. / GEOLOGY AND ORE DEPOSITS OF THE BAYHORSE REGION, CUSTER COUNTY, IDAHO, , pb, pages, 18 plates (1 in pocket), 17 figs., $ 65 B I / White, D. E. / ANTIMONY DEPOSITS OF A PART OF THE YELLOW PINE DISTRICT, VALLEY COUNTY, IDAHO, , pb, pages , 2 plates (1 in pocket), 1 figure, $ Geology of the southern part of the Lemhi Range, Idaho / by: Ross, Clyde P. Published: () Sedimentology and provenance of the Early Proterozoic Michigamme Formation and Goodrich Quartzite, northern Michigan: regional stratigraphic implications and suggested correlations / by: Ojakangas, Richard W., Published: ().

Custer County was so named for the gold mine that resides in the county. Custer County is named after the General Custer Mine that was discovered as early as The County is the third largest in the state of Idaho. Over , ounces of . b gh / ryder, r. t. / stratigraphic framework of cambrian and ordovician rocks in the central appalachian basin from morrow county, ohio, to pendleton county, west virginia, , pb, 28 pages, 1 plate (in pocket), 2 figs., 1 table, $ 8. Croneis, C. GEOLOGY OF THE ARKANSAS PALEOZOIC AREA Arkansas Geol. Surv. Bull. #3 8vo, ex-library else very good+ copy, spine title a .   In central Idaho along the Salmon River southwest of Challis, Cambrian and Ordovician carbonate and siliciclastic rocks of the Bayhorse assemblage (Hobbs and Hays, ; Hobbs et al., ) were deposited on the downfaulted western Cited by: 4.

the Bayhorse area, central Custer County, Idaho: USGS Miscella- neous Investigations Series, Map I Huh, O.K., , Mississippian stratigraphy and sedimentology. Analysis of the pre-Tertiary subcrop in the Lost River and Lemhi Ranges shows that progressively older rocks crop out beneath the Eocene unconformity northward from the eastern Snake River Plain (Rodgers and Janecke, ). Geologic map of the Bayhorse area, central Custer County, Idaho: U.S. Geological Survey Miscellaneous Investigations. Middle Cambrian to Ordovician post-breakup magmatism in the western United States is best represented by Covada Group and Bradeen Hill assemblage mafic rocks in the Kootenay terrane of Washington. Custer County (locality 1, index map). The minerals COLORADO I occur in the matrix of the breccia, and consist princi­ pally of titanium-free magnetite and Federate amounts of pyrite, some molybdenite, rare-earth apa­ tite, and other minerals. This matrix cements frag­ ments and boulders of andesitic rocks. The molybden­File Size: 13MB.