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SOUTHERN
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SOUTHERN CALIFORNIA Quaternary. Alluvium, &c. Terrace deposits and dune sand. Pliocene (?) Paso Robles formation Unconformity. Miocene (?) Pismo formation (in south part of area) . 3000=ft. Santa Margarita (in north part of area) . 1J50 t „ Unconformity. Miocene. Monterey shale 5000-7000 ft. Vaquero sandstone o- 500 „ Unconformity. Cretaceous. Atascadero formation . Unconformity. Comanchean. Toro formation (Knoxville) . .. 3000* ft. Un:onformity. 8o ft. 40 „ 40,,