Loess deposits.

Wind-deposited quartzose and calcareous silt in southeastern Idaho. Only shown where thick enough to mask older units; commonly 7-15 m (23-50 ft) thick. (Quaternary Sediments).
State Idaho
Name Loess deposits.
Geologic age Pleistocene
Lithologic constituents
Major
Unconsolidated > Fine-detrital > Silt (Eolian)Quartzose and calcareous silt.
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 Bannock - Bingham - Caribou - Cassia - Oneida - Power