Recognition and significance of boundary transforms and rift edges within island arc terranes of the western Sierra Nevada

Abstract

Fragmentation of island arcs and related dispersion of the resulting arc segments is common in modern continental margin environments. Inasmuch as a majority of Cordilleran accreted terranes show island arc affinities one would expect to find remnants of arc-related transforms and rifts within such terranes. Jurassic arc and ophiolitic terranes of the western Sierra Nevada and Klamath Mountains have regional age and structural patterns which suggest multiple rifting and transform faulting episodes, and some areas offer remnants of the actual rift or transform complexes.

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