- Usage in publication:
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- York Slate
- Modifications:
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- Named
- Dominant lithology:
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- Slate
- Phyllite
- Schist
- AAPG geologic province:
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- Alaska West-Central region
Summary:
Named York Slate to replace "slate of York region" of previous authors. Also rocks were called Hurrah Slate, Puckmummie Slate and Kuzitrin Series. Sainsbury (1972) recommended abandonment of several of these names. Original identity of various rocks units derived from York Slate shown on Bendeleben quad map, Seward Peninsula, AK. York Slate occurs widely in quad, especially along Kougarok River, along east side of Kugruk River, and in headwaters of Inmachuk River. Consists of thick sequence of carbonaceous quartz siltite with interbeds of graywacke and thin dark limestone; in most exposures metamorphosed to graphitic phyllite cut by numerous vitreous quartz veinlets; also metamorphosed to schist. Underlies Kanauguk Formation. Intercalates with Nome Group. Is Precambrian age at least in part based on stratigraphic relations.
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 ([ ]).