- Usage in publication:
-
- Mamey Lava Member*
- Modifications:
-
- Named
- Dominant lithology:
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- Lava
- Basalt
Summary:
The Mamey Lava Member of the Camarones Sandstone, here named was originally mapped by Kaye (1959) as intrusive andesite porphyry, but recent mapping shows it to be extrusive. Consists of dark-gray basalt with plagioclase phenocrysts. Was deposited conformably when enclosing rock was in a plastic state. Maximum thickness is 350 m. Age is Late Cretaceous, no older than Cenomanian.
Source: GNU records (USGS DDS-6; Reston 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 ([ ]).