- Usage in publication:
-
- Teutonia quartz monzonite*
- Modifications:
-
- Named
- Dominant lithology:
-
- Quartz monzonite
- AAPG geologic province:
-
- Great Basin province
Summary:
Teutonia quartz monzonite is named for Teutonia Peak [T9N R13E, Cima Dome 7.5' quad], San Bernardino Co, CA, where typical exposures occur. Extends across southern part of study area, where it exceeds 250 sq mi in area. Consists of holocrystalline, light gray (fresh) to pale reddish-brown (weathered) quartz monzonite [using current classification of igneous rocks the composition is that of a granite.] Composed mostly of feldspar and quartz that range from 5 to 15 mm with sparse plates of biotite. Remainder of rock consists of coarse crystals of pale-reddish or pink orthoclase from 20 to 40 mm in diameter. Age is Late Cretaceous or early Tertiary [on map].
Source: GNU records (USGS DDS-6; Menlo GNULEX).
- Usage in publication:
-
- Teutonia Quartz Monzonite*
- Modifications:
-
- Age modified
- Geochronologic dating
- AAPG geologic province:
-
- Great Basin province
Summary:
Age of the Teutonia Quartz Monzonite is Late Cretaceous based on isotopic dating (Pb-U).
Source: GNU records (USGS DDS-6; Menlo 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 ([ ]).