Gneissic and schistose metasedimentary rocks.

Biotite-rich paragneiss and schist, and subordinate feldspathic quartzite and calc-silicate rocks. Probably metamorphosed western facies of Lemhi subbasin. Characterized by igneous suite of Yam and Yag. Includes Elk City metamorphic sequence and metamorphic rocks east of Moscow, along Salmon River northwest of Salmon, and in Pioneer Mountains. (Mesoproterozoic Metasedimentary Rocks of Lemhi Subbasin of Belt Basin).
State Idaho
Name Gneissic and schistose metasedimentary rocks.
Geologic age Mesoproterozoic
Lithologic constituents
Metamorphic > Schist > Mica-schist > Biotite-schist
Metamorphic > Metasedimentary > Paragneiss
Metamorphic > Metasedimentary > Calc-silicate-rock
Metamorphic > Metasedimentary > Metaclastic > Quartzite

Lewis, Reed S., Link, Paul K., Stanford, Loudon R., and Long, Sean P., Geologic Map of Idaho, 2012, Idaho Geological Survey, Geologic Map 9 (M-9); Scale 1:500,000.

NGMDB product
Counties Clearwater - Custer - Idaho - Latah - Lemhi - Nez Perce - Valley