- Usage in publication:
-
- Sushitna slates*
- Modifications:
-
- Named
- Dominant lithology:
-
- Slate
- Quartz
- AAPG geologic province:
-
- Alaska Southern region
Summary:
Exposed for about 50 mi on Sushitna [later Susitna] River from point about 15 mi above mouth of Chulitna to considerable distance beyond mouth of Indian Creek, Cook Inlet region, southern AK. Slates are developed north and south of Sushitna-Tanana divide (about 80 mi width). Unit is essentially quartzitic, varying in coarseness from fine homogeneous rock to one of granular structure. Includes large number of quartz seams, 0.5 in to 2 ft thick. [age not given]
Source: GNU records (USGS DDS-6; Menlo GNULEX).
- Usage in publication:
-
- Susitna slate*
- Modifications:
-
- Areal extent
- Age modified
- AAPG geologic province:
-
- Alaska Southern region
Summary:
Susitna slate of Eldridge (1900) are geographically extended to area in lower course of Talkeetna River. Described as slates, graywacke-slates, and microcrystalline schists with intrusive granite. Age is probably pre-Jurassic based on degree of metamorphism.
Source: GNU records (USGS DDS-6; Menlo GNULEX).
- Usage in publication:
-
- Susitna slate*
- Modifications:
-
- Areal extent
- Age modified
- AAPG geologic province:
-
- Alaska Southern region
Summary:
Susitna slates of Eldridge (1900) are provisionally correlated with rocks of Knik Arm region. "Susitna slate is known to be pre-Jurassic." p.65
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 ([ ]).