- Usage in publication:
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- Telsitna Formation*
- Modifications:
-
- Named
- Biostratigraphic dating
- Dominant lithology:
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- Dolomite
- Limestone
- AAPG geologic province:
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- Alaska West-Central region
Summary:
Type section designated on high northeast-trending ridge along divide between head of Telsitna River and Paradise Fork, secs.17, 19 and 20 T18S R27E, Medfra D-2 quad, west-central AK. Is widely distributed Paleozoic unit in northern Kuskokwim Mountains. Is sequence of light-gray to dark-brown dolomite, thin-bedded fine-grained medium-gray limestone, and thick bedded limestone. Contains black chert about 200 m below top. Is approximately 2000 m thick, Gradationally overlies Novi Mountain Formation (new). Disconformably (?) underlies Paradise Fork Formation (new). Age is Middle and Late Ordovician based on conodonts (A.G. Harris and J.E. Repetski, written commun., 1979) and gastropods, corals, stromatoporoids, and trilobites. Partial list of fossils included in report.
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 ([ ]).