- Usage in publication:
-
- Dells Granite*
- Modifications:
-
- Original reference
- Dominant lithology:
-
- Granite
- AAPG geologic province:
-
- Southwestern Basin-and-Range region
Summary:
Pg. 44-47, pl. 1. Dells Granite. A uniform massive medium- to coarse-grained rock having granitic (seriate), locally porphyritic texture. Surrounded and unconformably overlain by Cenozoic rocks. Concealed contact between the granite and Government Canyon and Prescott Granodiorites (both new) may be a fault trending west-northwest close to southwestern outcrop of the granite. Probably younger than Prescott [Granodiorite]. Has been included in Bradshaw Granite (Jagger and Palache, 1905) which name is herein abandoned. Age is Precambrian. Report includes geologic map.
Named for Granite Dells about 5 miles northeast of Prescott, Prescott quadrangle, Yavapai Co., north-central AZ. Forms somewhat triangular mass about 5 sq mi in area. Forms bold outcrops.
[Misprint (USGS Bull. 1350, p. 202): Dells Granite is probably younger than Prescott Granite; should be Prescott Granodiorite.]
Source: US geologic names lexicon (USGS Bull. 1350, p. 201-202); supplemental information from GNU records (USGS DDS-6; Denver GNULEX).
- Usage in publication:
-
- Dells Granite*
- Modifications:
-
- Geochronologic dating
- AAPG geologic province:
-
- Southwestern Basin-and-Range region
Summary:
Dells Granite. Sample from near intersection of U.S. Highway 89 and 89a, Lat. 34 deg. 36 min. 50 sec. N., Long. 112 deg. 24 min. 40 sec. W., Yavapai County, Arizona. Minimum age 1,310 +/-50 Ma; age is perhaps close to time of crystallization.
Source: Modified from 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 ([ ]).