- Usage in publication:
-
- Sacramento Hill porphyry
- Modifications:
-
- First used
- Dominant lithology:
-
- Porphyry
- AAPG geologic province:
-
- Pedregosa basin
Summary:
First? published use of name. Name applied to rocks of Sacramento Hill in Bisbee District, Cochise County, AZ in the Pedregosa basin. Related to Juniper Flat granite. Porphyry of granitic to monzonitic composition forms the Sacramento Hill stock, and numerous dikes and sills. Intruded the Paleozoic and older rocks. Breccia ranging from a few feet to more than 500 feet wide surrounds the stock. The breccia includes fragments of all local pre-Cretaceous rocks. Assigned a pre-Cretaceous age by some authors and an early Tertiary age by others.
Source: GNU records (USGS DDS-6; Denver GNULEX).
- Usage in publication:
-
- Sacramento Hill Porphyry
- Modifications:
-
- Age modified
- AAPG geologic province:
-
- Pedregosa basin
Wilson, E.D., 1962, A resume of the geology of Arizona: Arizona Bureau of Mines Bulletin, no. 171.
Summary:
Regarded as Triassic-Jurassic. Juniper Flat Granite and Sacramento Hill porphyry stock invaded the zone of the Dividend fault in the Mule Mountains, Cochise Co, AZ in the Pedregosa basin.
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 ([ ]).