- Usage in publication:
-
- Bettles series*
- Modifications:
-
- Named
- Dominant lithology:
-
- Limestone
- Marble
- Schist
- AAPG geologic province:
-
- Alaska Northern region
Summary:
Named for exposures on lower part of Bettles River, where mountains formed by unit rise steeply 2000 ft or more above river. Series is capping rock over an area of about 2000 sq mi of upper waters of Chandlar [Chandalar] and Koyukuk Rivers, northern AK. Consists of heavy-bedded limestone or marble with interbedded mica-schist. Is younger than Lake quartzite-schist (new). [Age not given.]
Source: GNU records (USGS DDS-6; Menlo GNULEX).
- Usage in publication:
-
- Bettles "series"
- Modifications:
-
- Age modified
- AAPG geologic province:
-
- Alaska Northern region
Summary:
[Bettles "series" of Schrader (1900) accepted.] Series on upper Chandlar [Chandalar] River correlated with Skajit formation (of Late Silurian age) on John River, northern AK. Bettles overlies group of schists called "Rapid", "Lake", and amphibolite schists.
Source: GNU records (USGS DDS-6; Menlo GNULEX).
- Usage in publication:
-
- Bettles seriesâ€
- Modifications:
-
- Abandoned
- AAPG geologic province:
-
- Alaska Northern region
Summary:
Limestone of Chandalar district, originally called "Bettles series" by Schrader (1900) is now believed to be identical to Skajit limestone which name has long been used in place of system name.
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 ([ ]).