Quartzite, siltstone, conglomerate, and metavolcanic rocks; Late and Middle Proterozoic, undivided; Atlanta batholith roof pendants (IDZYm;0)

State	Idaho
Name	Quartzite, siltstone, conglomerate, and metavolcanic rocks; Late and Middle Proterozoic, undivided; Atlanta batholith roof pendants
Geologic age	Late and Middle Proterozoic, undivided
Original map label	PC; PC2; Y?s; Y1s; Y2s
Comments	ZYm includes Belt and Windermere strata, undivided, mostly as roof pendants and septa in the Atlanta lobe of the Idaho batholith (ID005).
Primary rock type	quartzite
Secondary rock type	meta-argillite
Other rock types	metaconglomerate; schist; calc-silicate rock; marble; amphibolite; mafic metavolcanic rock; felsic metavolcanic rock
Lithologic constituents	Major Metamorphic > Quartzite (Amphibolite)quartzite Minor Metamorphic > Marbledolomitic marble Metamorphic > Hornfels (Amphibolite)calc-silicate rock Metamorphic > Schist (Amphibolite)mica schist +/- sillimanite, staurolite Sedimentary > Clastic > Conglomerate (Bed)diamictic meta-conglomerate with metavolc and metased clasts Incidental Igneous > Volcanic > Mafic-volcanic Metamorphic > Phyllite Metamorphic > Amphibolite (Amphibolite)
Map references	Bond, J.G., Kauffman, J.D., Miller, D.A., and Venkatakrishnan, Ramesh, 1978, Geologic map of Idaho: Moscow, Idaho, Idaho Bureau of Mines and Geology, with contributions from U.S. Geological Survey, scale 1:500,000.
Unit references	Bond, J.G., Kauffman, J.D., Miller, D.A., and Venkatakrishnan, Ramesh, 1978, Geologic map of Idaho: Moscow, Idaho, Idaho Bureau of Mines and Geology, with contributions from U.S. Geological Survey, scale 1:500,000. Lund, Karen, Aleinikoff, J.N., Evans, K.V., and Fanning, C.M., 2003, SHRIMP U-Pb geochronology of Neoproterozoic Windermere Supergroup, central Idaho; implications for rifting of western Laurentia and synchroneity of Sturtian glacial deposits: Geological Society of America Bulletin, v. 115, no. 3, p. 349-372, 8 figures, 2 tables. Evans, K.V. and Green, G.N., 2003, Geologic map of the Salmon National Forest and vicinity, east-central Idaho: U.S. Geological Survey Geological Investigations Series I-2765, scale 1:100,000 with pamphlet, 19 p. [http://pubs.er.usgs.gov/publication/i2765] Tysdal, R.G., 2000, Revision of Middle Proterozoic Yellowjacket Formation, central Idaho: U.S. Geological Survey Professional Paper 1601-A, p. A1-A13. [http://pubs.er.usgs.gov/publication/pp1601AB]
Geographic coverage	Custer - Idaho - Lemhi - Valley