Certain occurrences of Martinez (Lower Eocene) rocks in the California coast ranges west of Salinas River may be of interest to paleogeographers and students of the Eocene. Martinez fossils were collected near the center of the NE. ¼ of Sec. 30, T. 25 S., R. 10 E. This locality is in northern San Luis Obispo County (Adelaida Quadrangle), approximately one mile south of Nacimiento River. A similar collection was obtained in the NW. ¼ of Sec. 24, T. 25 S., R. 9 E. (Adelaida Quadrangle) on the east bank of Las Tablas Creek within a few hundred feet of its...

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