Mica schist, quartzite, gneiss, and amphibolite; Late to Early Proterozoic high-grade metasedimentary rocks (subunits are ZXmhs, ZXmhq, and ZXmhc); trans-Idaho metamorphic province (IDZXmh;0)

State	Idaho
Name	Mica schist, quartzite, gneiss, and amphibolite; Late to Early Proterozoic high-grade metasedimentary rocks (subunits are ZXmhs, ZXmhq, and ZXmhc); trans-Idaho metamorphic province
Geologic age	Proterozoic
Original map label	PC; PC3
Comments	In central Idaho ZXmh includes undivided parts of the Syringa, Elk City, and Meadow Creek metamorphic sequences of ID185. In southwestern Idaho ZXmh includes high-grade metasedimentary rocks of probable Proterozoic age, but unknown stratigraphic correlation.
Primary rock type	mica schist
Secondary rock type	quartzite
Other rock types	calc-silicate rock; paragneiss; amphiibolite
Lithologic constituents	Major Metamorphic > Quartzite (Amphibolite)quartzite and micaceous quartzite Metamorphic > Schist (Amphibolite)biotite or muscovite schist +/- sillimanite, garnet, kyanite Minor Metamorphic > Gneiss (Amphibolite)calc-silicate paragneiss Metamorphic > Gneiss (Amphibolite)quartz-feldspar-biotite paragneiss Incidental Metamorphic > Amphibolite (Amphibolite)mostly concordant lenticular bodies
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. Fisher, F.S., McIntyre, D.H., and Johnson, K.M., 1992, Geologic map of the Challis 1o x 2o quadrangle, Idaho: U.S. Geological Survey Miscellaneous Investigations Series Map I-1819, scale 1:250,000 with pamphlet, 39 p. [http://pubs.er.usgs.gov/publication/i1819] Rember, W.C. and Bennett, Earl H., 1979, Geologic map of the Hailey quadrangle, Idaho: Moscow, Idaho, Idaho Bureau of Mines and Geology, Geologic Map Series, Hailey 2o quadrangle, scale 1:250,000. Mitchell V.E.. and Bennett, E.H., 1979, Geologic map of the Elk City quadrangle, Idaho: Moscow, Idaho, Idaho Bureau of Mines and Geology, Geologic Map Series, Elk City 2o Quadrangle, scale 1:250,000. Rember, W.C., and Bennett, E.H., 1979, Geologic map of the Hamilton quadrangle, Idaho: Moscow, Idaho, Idaho Bureau of Mines and Geology, Geologic Map Series, Hamilton 2o quadrangle, 1:250,000 scale. Lewis, R.S., 2003, Unpublished report on IGS digital geologic maps in preparation, north-central Idaho: Moscow, Idaho, Idaho Geological Survey, 1:100,000 scale. Lewis, R.S., Burmester, R.F., and Bennett, E.H., 1997, Metasedimentary rocks between the Bitterroot and Atlanta lobes of the Idaho batholith and their relationship to the Belt Supergroup: in Berg, R.B., ed., Belt Symposium III, 1993: Montana Bureau of Mines and Geology, Special Publication 112, p. 130-144.
Geographic coverage	Boise - Clearwater - Custer - Franklin - Idaho - Latah - Lemhi - Valley