Syenite and related rocks. (IDKis;0)

Syenite and related rocks.

Syenite, monzonite, quartz monzonite, and subordinate pyroxenite (115-110 Ma); includes Gem stocks north of Wallace, Gold Hill stock northeast of Potlatch, Benning Mountain stock along the Montana-Idaho border east of Sandpoint, syenite of Wall Mountain north of Bonners Ferry, monzonite of Long Canyon (~88 Ma) northwest of Bonners Ferry, and no Business Mountain pluton (uncertain age) west of Donnelly. (Paleocene and Cretaceous Idaho Batholith and Older Cretaceous and Jurassic Intrusive Rocks).

State	Idaho
Name	Syenite and related rocks.
Geologic age	Cretaceous
Lithologic constituents	Major Igneous > Plutonic > Syenitic > Monzonite (Stock or pipe, Pluton) Igneous > Plutonic > Syenitic > Syenite (Stock or pipe, Pluton) Igneous > Plutonic > Syenitic > Quartz-monzonite (Stock or pipe, Pluton) Minor Igneous > Volcanic > Ultramafic > Pyroxenite (Stock or pipe, Pluton)
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 - Bonner - Boundary - Latah - Shoshone

Syenite 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.