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Southern California Geology

Geologic Setting of the Transverse Ranges Province

San Bernardino Mountains

Geologic Setting East of the San Andreas Fault Zone

The main mass of the San Bernardino Mountains occurs east of the San Andreas Fault zone, although a thin slice of rocks native to the mountains occurs on Yucaipa Ridge outboard (southwest) of the Mill Creek strand of the San Andreas and has been displaced about 8 km northwest of its original position (Matti and others, 1985, 1992a; Matti and Morton, 1993).

Rocks of the main San Bernardino Mountains are similar to those in the Mojave Desert Province . They span a broad range of compositions and geologic ages and have been deformed by a variety of geologic structures. This web discussion describes these geologic materials and structures in terms of their relation to Mesozoic intrusions of granitic rock that formed major batholithic belts in this part of southern California.

Table of Contents

Prebatholithic Rocks
Proterozoic Crystalline Rocks
Late Proterozoic and Paleozoic Metasedimentary Rocks
Metaquartzite Sequences
Metacarbonate Sequences
Structure and Metamorphism
Mesozoic Batholithic Rocks
Older Plutonic and Volcanic Rocks
Deformed Metamorphic and Plutonic Complex

Continue to Prebatholithic Rocks

Selected References

Return to Transverse Ranges Province

Return to Geologic Setting and Geologic History

Return to Southern California Geology

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