Basalt (Quaternary).

Flows and cinder cones of olivine tholeiite basalt and minor latite and alkaline basalt less than 15 ka; includes Shoshone, Craters of the Moon, Wapi, Cerro Grande, and Hells Half Acre lava fields. Little or no loess cover. (Quaternary to Eocene Continental Volcanic and Intrusive Rocks).
State Idaho
Name Basalt (Quaternary).
Geologic age Quaternary
Lithologic constituents
Major
Igneous > Volcanic > Mafic-volcanic > Basalt (Flow, Pyroclastic-cinder cone)Flows and cinder cones of olivine tholeiite basalt.
Minor
Igneous > Volcanic > Felsic-volcanic > Latite (Flow, Pyroclastic-cinder cone)Minor latite and alkaline basalt.
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
Counties Bingham - Blaine - Bonneville - Butte - Gooding - Lincoln - Minidoka - Power