- Usage in publication:
-
- East Fork Hills Formation*
- Modifications:
-
- Named
- Biostratigraphic dating
- Dominant lithology:
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- Limestone
- AAPG geologic province:
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- Alaska West-Central region
Summary:
Named as formation in East Fork terrane. Type locality designated along crest of East Fork Hills, sec.14 T27S R25E, Medfra A-3 quad, west-central AK. Occurs along both sides of North Fork of Kuskokwim River from just east of Limestone Mountain to Hardscrabble Creek and southeastward to Moose Hill. Consists of poorly exposed sequence of dark-gray, orange-weathering finely laminated limestone and dolomitic limestone. Is several 100 m thick. Is in fault contact with Whirlwind Creek and Telsitna Formations (both new of Nixon Fork terrane). Age ranges from Early Ordovician to Middle Devonian based on conodonts (J.E. Repetski, written commun., 1977-79).
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 ([ ]).