Subduction initiation, subduction accretion and nonaccretion, large-scale material movement, and localization of subduction megaslip recorded in Franciscan complex and related rocks, California
John Wakabayashi, 2013. "Subduction initiation, subduction accretion and nonaccretion, large-scale material movement, and localization of subduction megaslip recorded in Franciscan complex and related rocks, California", Geologic Excursions from Fresno, California, and the Central Valley, Keith Putirka
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The Franciscan complex of California provides the ideal field laboratory to examine the rock record of subduction. This field trip guide describes a two-day field trip of the 2013 Geological Society of America Cordilleran Section Meeting. The field stops include a stop along the Panoche Road in the southern Diablo Range, and four in the San Francisco Bay region: one on the southern margin of the California State University East Bay campus in the Hayward Hills; one, with additional optional stops, at El Cerrito quarry north of Berkeley; one at Ring Mountain on Tiburon Peninsula; and the final stop at Rodeo Cove of the Marin Headlands. The geology seen at these stops provides insight into subduction initiation processes, subduction accretion and subduction erosion, accretion of ocean plate stratigraphy, mélange evolution, multiple burial-exposure cycles, exhumation of high-pressure metamorphic rocks, localization of subduction megathrust slip, large-scale subduction complex architecture, and spreading ridge deformation. The field trip stops will captivate visitors with their scenic beauty as well as their interesting geology.
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In this volume we present seven field trip guides that span the breadth of the geology of central California. The trips are associated with the 2013 Cordilleran Section meeting of the Geological Society of America, convened in Fresno, California. These trips provide guides to some of the most remarkable of geologic localities, which are not only iconic, but form type examples of key geologic phenomena and include Yosemite National Park, the San Andreas fault, the Franciscan complex, and the Sierra Nevada Foothills near Fresno, California. The topics covered by these field trips include the nature of continental transform faults, the initiation of subduction, the origin of the Sierra Nevada batholith, the initiation of the Sierra Nevada arc, Pleistocene vertebrate fossils of the Central Valley, and debris flows triggered from burned watersheds.