- Usage in publication:
-
- Puckmummie schist*
- Modifications:
-
- Named
- Dominant lithology:
-
- Schist
- Slate
- AAPG geologic province:
-
- Seward Peninsula province
- Alaska West-Central region
Summary:
Named for best exposures on lower part of Puckmummie Creek, northeast corner of Casadepaga quad, Seward Peninsula, AK. Also exposed on rocky knob to east, in low hill northwest of Post Creek and in few scattered outcrops. Is part of Nome group. Has two distinct lithologic phases which seem to occur interlaminated: a dark-grayish, granular, slightly schistose phase and finer-grained, nearly black, slightly graphitic or carbonaceous and slaty phase. Is possibly equivalent to Hurrah slate (new). Is younger than Solomon schist (new) and probably younger than Sowik limestone (new). Assigned to post-Ordovician age.
Source: GNU records (USGS DDS-6; Menlo GNULEX).
- Usage in publication:
-
- Puckmummie Schist*
- Modifications:
-
- Age modified
- AAPG geologic province:
-
- Seward Peninsula province
- Alaska West-Central region
Summary:
Puckmummie Schist in Casadepaga area is Precambrian based on probable correlation with slate, graphitic siltite, and quartz mica schist of York region in western Seward Peninsula. (Shown on generalized geologic map of Seward Peninsula as of late Precambrian age.)
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 ([ ]).