- Usage in publication:
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- Thorp Drift
- Modifications:
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- Named
- Dominant lithology:
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- Till
- AAPG geologic province:
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- Cascades province
Summary:
Type locality designated as: till facies at Horse Canyon, west wall at 790 m elevation, NW/4 SW/4 sec.4 T19N R17E; outwash facies at landslide scarp on north side of Yakima River 1.5 km east of Thorp, NE/4 sec.12 T18N R17E, Kittitas Co, WA. Consists of informal till and outwash gravel facies with interbedded sand and silt. Till described as stony and fissile containing erratics with weathering rinds. Deeply oxidized braided-stream deposits are poorly sorted. Unconformably overlies Ellensburg Formation; underlies Kittitas Drift (new) or younger Quaternary deposits. Is Pleistocene age.
Source: GNU records (USGS DDS-6; Menlo GNULEX).
For more information, please contact Nancy Stamm, Geologic Names Committee Secretary.
Asterisk (*) indicates published by U.S. Geological Survey authors.
"No current usage" (†) implies that a name has been abandoned or has fallen into disuse. Former usage and, if known, replacement name given in parentheses ( ).
Slash (/) indicates name conflicts with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005, 2021). May be explained within brackets ([ ]).