State | Michigan |
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Name | Copper Harbor Conglomerate |
Geologic age | Middle Proterozoic |
Lithologic constituents |
Major
Sedimentary > Clastic > Conglomerate (Bed)Red lithic conglomerate and sandstone; mafic to felsic volcanic flows similar to those of the unnamed formation (unit Yu) are interlayered with the sedimentary rocks.
Sedimentary > Clastic > Sandstone (Bed)Red lithic conglomerate and sandstone; mafic to felsic volcanic flows similar to those of the unnamed formation (unit Yu) are interlayered with the sedimentary rocks.
Minor
Igneous > Volcanic > Mafic-volcanic (Flow)Red lithic conglomerate and sandstone; mafic to felsic volcanic flows similar to those of the unnamed formation (unit Yu) are interlayered with the sedimentary rocks.
|
Comments | Note: The unnamed formation has since been named the Porcupine Volcanics (""Ypv""). |
References | Sims, P.K., 1992, Geologic map of Precambrian rocks, southern Lake Superior region, Wisconsin and northern Michigan: U.S. Geological Survey Miscellaneous Investigations Map I-2185, scale 1:500,000.https://pubs.er.usgs.gov/publication/i2185 Cannon, W.F., Kress, T.H., Sutphin, D.M., Morey, G.B., Meints, Joyce, and Barber-Delach, Robert, 1997, Digital Geologic Map and mineral deposits of the Lake Superior Region, Minnesota, Wisconsin, Michigan: USGS Open-File Report 97-455 (version 3, Nov. 1999).https://pubs.er.usgs.gov/publication/ofr97455 |
NGMDB product | |
Counties | Gogebic - Houghton - Keweenaw - Ontonagon |