- Usage in publication:
-
- Morzhovoi volcanics*
- Modifications:
-
- Named
- Dominant lithology:
-
- Basalt
- Pyroclastics
- Volcaniclastics
- AAPG geologic province:
-
- Alaska Peninsula province
- Alaska Southwestern region
Summary:
Named for eroded remnants of Morzhovoi volcano. Type locality designated at base of formation which crops out along Pacific coast south and east of Reynolds Head, Morzhovoi Bay, Alaska Peninsula, AK. Is sequence of lava flows and interbedded pyroclastic rocks with some associated volcanic sedimentary rocks. Lava flows are light- to pinkish-gray porphyritic basalts. Total thickness is not known but 3000 ft are exposed. Overlies Belkofski tuff (new) and Tachilni formation (new). Underlies Frosty Peak volcanics (new) and Quaternary alluvium. Age cannot be older than latest Tertiary nor younger than middle Pleistocene based on correlation and comparison of erosion with other units.
Source: GNU records (USGS DDS-6; Menlo GNULEX).
- Usage in publication:
-
- Morzhovoi Volcanics*
- Modifications:
-
- Age modified
- AAPG geologic province:
-
- Alaska Peninsula province
- Alaska Southwestern region
Summary:
Morzhovoi Volcanics. Age is late Miocene(?), Pliocene, and early Quaternary(?) based on stratigraphic relationships.
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 ([ ]).