Sandstone Extrusions and Slope Channel Architecture and Evolution: Mio-Pliocene Monterey and Capistrano Formations, Dana Point Harbor, Orange County, California, U.S.A.

摘要

The Miocene Monterey Formation and deepwater channels of the Mio-Pliocene Capistrano Formation crop out at Dana Point Harbor (California) and are locally separated by a series of extruded sandstone bodies. Stratigraphic columns, photo panels, and high-resolution lidar data are used to describe the stratigraphy of the 840-m-wide, 30-m-thick exposure. The studied exposure contains: (1) a lower unit composed of Monterey slope mudstone, (2) an up to 13-m-thick, discontinuous middle unit of structureless sandstone bodies, and (3) an upper sandstone unit composed of the laterally and vertically stacked breccia-, conglomerate-, and sand-filled channels of the Capistrano Formation.