GEOLEX

Summary of Citation: Avawatz Mountains

Publication:
Spencer, J.E., 1990, Geologic map of the southern Avawatz
   Mountains, northeastern Mojave Desert region, California:
   U.S. Geological Survey Miscellaneous Field Studies Map,
   MF-2117, 1 sheet, scale 1:24,000

Usage in Publication:
Avawatz Mountains Quartz Monzodiorite*

Modifications:	Geologic Province:	Dominant Lithology:
Named Isotopic dating	Mojave basin	Quartz monzonite Granodiorite Granite

Summary:
Named for Avawatz Mountains. Type locality designated as exposures along wash above Sheep Creek Spring between 2000 and 2800 ft elev., NW/4 T17N R6E, Avawatz Pass 15' quad, San Bernardino Co, CA. Consists of granitoid rocks ranging from quartz monzodiorite to quartz monzonite to granodiorite to granite. Equivalent to (informal) Avawatz quartz monzodiorite of Spencer (1981, 1987). Age is Jurassic based on U/Pb zircon age of 177 +/-10 Ma.