Analyzes the lithology of a sequence of supercrustal rocks in southeaternmost California and southwesternmost Arizona known as the Winterhaven Formation, presenting data on its geologic setting, stratigraphy, metamorphism and deformation, basil contact, and age; and providing conclusions concerning its tectonic significance.

The authors of the ten chapters in this volume critically examine the geologic evidence that constrains timing and magnitude of movement on various faults of the San Andreas system, and they develop and discuss paleogeologic reconstructions based on these constraints. The volume offers new insight into the evolution of the San Andreas fault system,