Mesozoic metasedimentary framework and gabbroids of the Early Cretaceous Sierra Nevada batholith, California
Diane Clemens-Knott, Jason B. Saleeby, 2013. "Mesozoic metasedimentary framework and gabbroids of the Early Cretaceous Sierra Nevada batholith, California", Geologic Excursions from Fresno, California, and the Central Valley, Keith Putirka
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Petrologic, structural, geochronologic, and geochemical data from rocks exposed in the western foothills of the Sierra Nevada batholith just south of the western Foothills metamorphic belt (the Stokes Mountain region) provide new insight regarding several poorly understood aspects of the development of the compound Sierra Nevada arc. Exposures of three different metasedimentary packages together document transitions in the depositional environments present along the outboard edge of this arc segment throughout the Mesozoic Era, culminating in the emergence of the Cretaceous continental margin arc. Exposures of mafic cumulates and associated differentiates of the Early Cretaceous batholith permit investigation into the earliest stages of differentiation of depleted-mantle–derived arc magmas. Together with the surrounding Kings-Kaweah ophiolite belt, these Mesozoic plutonic and metasedimentary rocks are proposed to form an analog for the crystalline basement underlying much of the eastern half of the Great Valley forearc basin.
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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.