- Usage in publication:
-
- Khaz Formation*
- Modifications:
-
- Named
- Dominant lithology:
-
- Greenstone
- Graywacke
- AAPG geologic province:
-
- Alaska Southeastern region
Summary:
Named as uppermost formation (of 5) of Kelp Bay Group for exposures on Khaz Peninsula. Type locality designated as part of Khaz Peninsula at latitude of head of Slocum Arm, Chichagof Island, southeastern AK. Also occurs on northwestern Baranof Island. Composed of greenstone, greenschist, graywacke, and phyllite. Thickness is impossible to estimate owing to its chaotic structure but general dip and width suggest it is perhaps 1000's of ft thick. Intertongues with and overlies other members of Kelp Bay Group. Conformably underlies Sitka Graywacke (new). Age is considered to be Triassic and (or) Jurassic on basis of fragment of scleractinian colonial coral.
Source: GNU records (USGS DDS-6; Menlo GNULEX).
- Usage in publication:
-
- Khaz Formation*
- Modifications:
-
- Age modified
- Biostratigraphic dating
- AAPG geologic province:
-
- Alaska Southeastern region
Summary:
Age is Late Jurassic and Cretaceous based on megafossils (from matrix and blocks of melange) (BUCHIA) and Tithonian radiolarians from unit.
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 ([ ]).