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- Usage in publication:
-
- Eagle Gulch latite
- Modifications:
-
- Named
- Dominant lithology:
-
- Quartz latite
- AAPG geologic province:
-
- San Luis basin
Summary:
Named for rocks exposed on both sides of Eagle Gulch, Saguache Co, CO in San Luis basin. No type locality designated. Composed of a gray massive rock properly called quartz latite with a fine-grained groundmass. Has phenocrysts of orthoclase and smaller plagioclase phenocrysts. Lacks flow and rhyoclastic structure. No fragments of andesite enclosed. Is of Tertiary age.
Source: GNU records (USGS DDS-6; Denver GNULEX).
- Usage in publication:
-
- Eagle Gulch latite*
- Modifications:
-
- Areal extent
- Overview
- AAPG geologic province:
-
- San Luis basin
Summary:
Probably does not extend much west of Kerber Creek in San Luis basin; its eastern limit is unknown. Does not possess uniform characteristics which suggests it may be the result of a multiple intrusion. Intrudes Bonanza and Hayden Peak latites. Mapped (geologic map) in east-central part of district. Is of Tertiary age.
Source: GNU records (USGS DDS-6; Denver 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 ([ ]).