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Geologic units containing alluvial fan
A low, outspread, relatively flat to gently sloping mass of loose rock material, shaped like an open fan or a segment of a cone, deposited by a stream (esp. in a semiarid region) at the place where it issues from a narrow mountain valley upon a plain or broad valley...
- Gravel, sand, and clay; Quaternary-Tertiary colluvium and fanglomerate; western Idaho (Pleistocene and Pliocene)
- Pleistocene and Pliocene fanglomerate, colluvium, and poorly sorted gravel deposits.
- Gravel, sand, and silt; glacial outburst flood deposits, outwash, fanglomerate, and alluvium, undivided; Pleistocene (Pleistocene)
- Pleistocene outwash, fanglomerate, flood and terrace gravels; sudivisions are: (Qpug, Qpmg, and Qplg).
- Gravel, sand, and silt; Quaternary; alluvium (Quaternary)
- Quaternary alluvium; may contain some glacial deposits and colluvium in uplands
- Gravel, sand, and silt; Quaternary basin-filling alluvium; Snake River Plain, Basin and Range provinces (Quaternary)
- Quaternary detritus; generally basin-filling deposits of central and southern Idaho.
- Fanglomerate (Holocene? and Pleistocene) (Pleistocene to Holocene)
- Poorly sorted and poorly stratified alluvial fan debris, slope wash, colluvium, and talus; composed mostly of silt and fragments of basalt, basaltic andesite, and andesite. In places includes small areas of pediment gravels and colluvium
- alluvial fan deposits (Phanerozoic | Cenozoic | Quaternary | Pleistocene Holocene)
- alluvial fan deposits