- Usage in publication:
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- Cripple Gravel*
- Modifications:
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- Named
- Dominant lithology:
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- Gravel
- AAPG geologic province:
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- Alaska East-Central region
Summary:
Named for exposures on Cripple Creek 15 km west of Fairbanks. Type locality designated as exposures at mining excavation in valley of Cripple Creek adjacent to "Ester Island" a hillock of loess that lies between Ester and Cripple Creeks in SW 1/4 sec.8 T1S R2W, Fairbanks D-3 quad, AK. Composed of poorly to well sorted, coarse angular brown gravel and solifluction deposits. Gravel is composed of fairly well rounded quartz and quartzite boulders in a gray sandy matrix with mica flakes. Placer gold occurs at and near base of formation. Thickness ranges 1 to 25 m. Overlies bedrock or clay. Unconformably underlies Chena Alluvium, Fox Gravel, Tanana Formation, Dawson Cut Formation, Gold Hill Loess, Goldstream Formation (all new), or Fairbanks Loess. Age is late Pliocene and (or) early Pleistocene.
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 ([ ]).