Tonalitic orthogneiss and foliated granodiorite.

Orthogneiss (primarily tonalite) and foliated granodiorite (~90 to ~80 Ma). Includes early phases of the Idaho batholith, migmatite, intrusions along major structures, and plutonic rocks of uncertain age along the Salmon River northwest of Salmon. (Paleocene and Cretaceous Idaho Batholith and Older Cretaceous and Jurassic Intrusive Rocks).
State Idaho
Name Tonalitic orthogneiss and foliated granodiorite.
Geologic age Cretaceous
Lithologic constituents
Igneous > Plutonic > Granitic > Granodiorite (Batholith, Pluton)Foliated granodiorite.
Metamorphic > MetaigneousORTHOGNEISS - Orthogneiss (primarily tonalite) and foliated granodiorite.
Metamorphic > Migmatite

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 Bonner - Clearwater - Gem - Idaho - Kootenai - Lemhi - Valley