- Usage in publication:
-
- Chiuli Shaik Formation*
- Modifications:
-
- Named
- Dominant lithology:
-
- Conglomerate
- Graywacke
- Andesite
- Rhyolite
- AAPG geologic province:
-
- Basin-and-Range province
Summary:
Named. Type section is about 2 mi east of the village of Chiuli Shaik in Fresnal Wash, Baboquivari Mountains, Pima Co, AZ, Basin-and-Range province. Composed of discontinuous lenticular intertonguing sedimentary and volcanic rocks disconformably above the newly named Mulberry Wash Volcanic Formation (new). Is overlain unconformably by Fresnal Conglomerate of probable Tertiary age. Some beds form steep rugged hills; some erode to valleys. Mapped (geologic map) between Mulberry Wash and Sycamore Canyon in Ts18 and 19S, R9E. Contains: a lower unit, 750 ft thick, of red to brown conglomerate, brown mud flows, arkose, graywacke, and lenses of limestone; and a conformably overlying upper unit, about 1,000 ft thick, of flows and breccias of maroon and purple andesite and rhyolite tuff. Is of Mesozoic? age.
Source: GNU records (USGS DDS-6; Denver GNULEX).
- Usage in publication:
-
- Chiuli Shaik Formation*
- Modifications:
-
- Age modified
- AAPG geologic province:
-
- Basin-and-Range province
Summary:
Is assigned a Jurassic or Cretaceous 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 ([ ]).