- Usage in publication:
-
- Ketchikan series*
- Modifications:
-
- Named
- Dominant lithology:
-
- Argillite
- Schist
- Limestone
- AAPG geologic province:
-
- Alaska Southeastern region
Summary:
Occurs in vicinity of Ketchikan, on both sides of Tongass Narrows, on western part of Revillagigedo Island, on Cleveland Peninsula, along George Inlet, and eastern side of Behm Canal as far as Traitors Cove. Forms belt between Vallenar series (new) and granite of Coast Range. Ketchikan series is composed of argillaceous and arenaceous schists, including some limestone areas. Intruded by stocks. Contains gold ores on Cleveland Peninsula. Thickness and age could not be determined but believed to be in part Mesozoic. Correlation suggests limestones are Carboniferous and that argillites are Triassic.
Source: GNU records (USGS DDS-6; Menlo GNULEX).
- Usage in publication:
-
- "Ketchikan series"†
- Modifications:
-
- Abandoned
- AAPG geologic province:
-
- Alaska Southeastern region
Summary:
"Ketchikan series" of Brooks (1902) included in unnamed rocks of Carboniferous and Triassic age. [Name "Ketchikan" thus is abandoned.]
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 ([ ]).