174 



GEOLOGY AND QUICKSILVER DEPOSITS, NEW ALMADEN DISTRICT, CALIFORNIA 



800 



I i 







I 



HORIZONTAL AND VERTICAL SCALE 



EXPLANATION 



800 FEET 



i 



Plncenef?) 



Upper Miocene 

 or Pliocene 



Upper Jurissic fo 

 Upper Creftceous 



Quicksilver ore 



Rocks of the Franciscan group 



TERTIARY 



JURASSIC. 

 CRETACEOUS. 

 AND YOUNGER 



JURASSIC 



AND 

 CRETACEOUS 



Numbered contact discussed 

 in text 



Geology and workings by U. S. Geological Survey 



FIODRE 100. Oenernllipcl nectlon through New Almaden mine along the Day tunnel. A, After C. N. Schuette. 1930. 

 fig. 2, p. 14 (Bllghtly modified). B, Shows geology a Interpreted by the writer*. See also lection 0-C', plate 11 

 for additional detail. 



