Petrographic and chemical reconnaissance study of some granitic and gneissic rocks near the San Andreas fault from Bodega Head to Cajon Pass, California

Abstract

Introduction-______________________________________ Basement rocks of the Coast Ranges__________________ Central Coast Ranges.__________________________ Quartz diorite of Bodega Head_______________ Granitic basement rocks of the Point Reyes area_____________________________________ Setting and general description.__________ Microscopic description________________ Granodiorite of Point Reyes.________ Alaskite and aplite__________________ Metamorphic rocks.________________ Distinguishing features._________________ Granodiorite of Southeast Farallon Island-____ Granitic rocks of Montara Mountain..________ Basement rocks of the Ben Lomond area_-___-