- Usage in publication:
-
- Hayden Peak latite
- Modifications:
-
- Named
- Dominant lithology:
-
- Latite
- AAPG geologic province:
-
- San Luis basin
Summary:
Named for Haydens [also spelled Hayden's] Peak about T46N, R9E, Saguache Co., CO in San Luis basin. No type locality designated. Exposed only on summit of Haydens Peak and on North Haydens Peak. Is a fine-grained, brownish-gray, massive and homogeneous latite. Has numerous phenocrysts of feldspar. Contains quartz in groundmass. Is of Tertiary age.
Source: GNU records (USGS DDS-6; Denver GNULEX).
- Usage in publication:
-
- Hayden Peak latite*
- Modifications:
-
- Revised
- AAPG geologic province:
-
- San Luis basin
Summary:
Consists of two flows about 1,000-1,500 ft thick in San Luis basin. Is younger than Rawley andesite, a new name. Is contemporaneous in part with Bonanza latite. Includes some underlying rocks mapped by Patton as andesite and as Bonanza latite. Mapped (geologic map) in southeast 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 ([ ]).