Riggins Group, Orofino series, and related rocks. (IDKPro;0)

Riggins Group, Orofino series, and related rocks.

Metasedimentary and metavolcanic schist, gneiss, amphibolite, and marble, all of uncertain age, along eastern margin of island-arc complex; typically hornblende-rich. Includes Pollock Mountain amphibolite southeast of Riggins and gneiss of Swiftwater Creek near Lowell. (Mesozoic-Paleozoic Rocks of the Blue Mountains Island-Arc Complex).

State	Idaho
Name	Riggins Group, Orofino series, and related rocks.
Geologic age	Cretaceous to Permian
Lithologic constituents	Major Metamorphic > GneissMetasedimentary and metavolcanic; typically hornblende-rich. Metamorphic > SchistMetasedimentary and metavolcanic; typically hornblende-rich. Metamorphic > AmphiboliteMetasedimentary and metavolcanic; typically hornblende-rich. Minor Metamorphic > Metasedimentary > Metacarbonate > Marble
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	Adams - Clearwater - Idaho - Nez Perce

Riggins Group, Orofino series, and related rocks.

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.