page_title: Cozy Dell Shale
hierarchical_section_title: Cozy Dell Shale
caption_attribution_description: English: Cozy Dell Formation — Giant shale rip-up clast at the base of a high-density turbidite. In the Topatopa Mountains, Ventura County, Southern California.
context_page_description: The Cozy Dell Shale is a geologic formation of middle Eocene age that crops out in the Santa Ynez Mountains and Topatopa Mountains of California, extending from north of Fillmore in Ventura County westward to near Point Arguello, north of Santa Barbara. Because the Cozy Dell easily weathers to a clay-rich soil, it crops out infrequently and generally forms dense stands of chaparral in saddles between peaks and ridges of the more resistant Matilija and Coldwater formations.
context_section_description: The Cozy Dell Shale is a geologic formation of middle Eocene age that crops out in the Santa Ynez Mountains and Topatopa Mountains of California, extending from north of Fillmore in Ventura County westward to near Point Arguello, north of Santa Barbara. Because the Cozy Dell easily weathers to a clay-rich soil, it crops out infrequently and generally forms dense stands of chaparral in saddles between peaks and ridges of the more resistant Matilija and Coldwater formations.
caption: Giant shale rip-up clast  (bottom of photo) at the base of a high-density turbidite. Cozy Dell formation, Topatopa Mountains.
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