|Name||Sedimentary rocks and sediments.|
|Geologic age||Oligocene and Eocene|
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.
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.
|Counties||Butte - Clark - Clearwater - Custer - Latah - Lemhi|