Sedimentary rocks and sediments.

Fluvial and lacustrine deposits; includes conglomerate, sandstone, and shale near Salmon; Pass Creek Gravel, Wet Creek Gravel, and Donkey Fanglomerate north of Mackay; Medicine Lodge beds of southern Beaverhead Mountains; and isolated deposits in northern Idaho. (Quaternary to Eocene Continental Sediments and Sedimentary Rocks).
State Idaho
Name Sedimentary rocks and sediments.
Geologic age Oligocene and Eocene
Lithologic constituents
Major
Unconsolidated (Fluvial, Lacustrine)Fluvial and lacustrine deposits. Pass Creek Gravel, Wet Creek Gravel, and Donkey Fanglomerate north of Mackay; Medicine Lodge beds of southern Beaverhead Mountains; and isolated deposits in northern Idaho.
Sedimentary > Clastic > Mixed-clastic (Bed)Includes conglomerate, sandstone, and shale.
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 Butte - Clark - Clearwater - Custer - Latah - Lemhi