- Usage in publication:
-
- Windy Fork Formation*
- Modifications:
-
- Named
- Dominant lithology:
-
- Siltstone
- Sandstone
- Redbeds
- AAPG geologic province:
-
- Alaska West-Central region
Summary:
Unit is named the Windy Fork Formation for the Windy Fork of the Kuskokwim River. Consists of siliciclastic redbeds dominated by siltstone and sandstone beds (2-19 m thick) weathering to earthy yellow or orange-brown; fresh surfaces are gray. Interbeds of lime mudstone and dolomitic mudstone (up to 6 m thick) which weathers from gray to tan. Total thickness is unknown, but is at least 84 m at type. Lower contact is not visible at type; upper contact is sharp and conformable with the Big River Dolostone (new). Age is Late(?) Proterozoic.
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 ([ ]).