The Geologic Map 



89 



FIG. 24. Areal geology of a portion of the Conrad Quadrangle, east of 

 Berkeley. The formations, designated by numbers are: 1. Orinda (Pliocene), 

 fresh-water conglomerate, sandstone, shale, clay, and limestone; 2. Moraga 

 (Pliocene), lava flows, with gravel, clay, and limestone; 4. Siesta (Pliocene), 

 fresh- water conglomerate, clay, sandstone, chert, limestone, and lignite; 

 5. Bald Peak Basalt (Pliocene), lava flows with included fresh- water lime- 

 stone; 6. Claremont (Miocene), shale, chert, sandstone, and limestone; 



7. Chico (Upper Cretaceous), sandstone and shale, with conglomerate; 



8. Knoxville (Lower Cretaceous), shale; 9. Ryolite (Pliocene), lava; 

 10. Temescal (Quaternary), alluvium; 11. Franciscan (Jurassic), meta- 

 morphic schists, with radiolarian chert; 12. Briones (Miocene), sandstone, 

 with shale; 13. Rodeo (Miocene), shale; 14. San Pablo (Miocene), sandstone, 

 with volcanic tuff; 15. Hambre (Miocene), sandstone. 



