GEOLOGIC MAPS AND NOTES ALONG HIGHWAY 49 BOWEN AND CRIPPEN 



57 



MAP SYMBOLS 

 9 Lode and drift mines 

 A Placer and hydraulic (hyd) 



(Mine names in red) 

 -^ == Highway 49 

 GH] Historical markers 

 ,jt<. Town buildings and roads 



MAP SYMBOLS FOR 



BUILDING STONE 

 CD Adobe 



Granite, granodiorite 



Greenstone (meta-andesite) 



Limestone 



Rhyolite tuff 



Schist 



Serpentine and talc schist 



Slate 



Tuffaceous sandstone 



Soapstone 



Unclassified rock 

 Quarry site 



EXPLANATION 



Andesile breccia and conglom- 

 Tv erote Includes basalt and 



Table Mtn latiie 



Tvr Rhyolite tuff and ash 



Old nver deposits Chiefly 

 Eocene quartz gravels, 



gold-bearing 



ord Granitic rocks- granite 

 9 to diorite 



Ultra-basic rocks- 

 chiefly serpentine 



QP Porphyntic rocks quartz 

 and hornblende porphyries 



Meto-sediments. Chiefly 

 Manposa formation slate, 

 graywacke, etc. 



Jtnv Melo ' volcon ' cs Chiefly Log- 

 town Ridge meto-andesite 



Milton formation tuff, red 

 J"Rm slate, quortzite, limestone, 

 and conglomerate 



Meta-volcanics of 

 uncertain age 



Caloveros formation mica- 

 Cc schist, phyllite, quartzite, 

 clay slate, argillite, etc. 



Colaveras limestone 



Note-Blank pattern box indicates 

 rock type is not shown on map 



SCALE 



MAP 4 

 ALTAVILLE-MOKELUMNE HILL 



