Augen gneiss. (IDYag;0)

Augen gneiss.

Biotite granite and granitic augen gneiss near Elk City and northwest of Salmon (~1380 Ma). Abundant alkali feldspar and high iron content indicate A-type granite composition. (Mesoproterozoic Intrusive Rocks).

State	Idaho
Name	Augen gneiss.
Geologic age	Mesoproterozoic
Lithologic constituents	Major Igneous > Plutonic > Granitic > GraniteBiotite granite and granitic augen gneiss. Abundant alkali feldspar and high iron content indicate A-type granite composition. Metamorphic > Metaigneous > OrthogneissGranitic augen gneiss.
References	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	NGMDB product page for 97750
Counties	Idaho - Latah - Lemhi

Augen gneiss.

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.