GEOLOGIC MAPS AND NOTES ALONG HIGHWAY 49 BOWEN AND CRIPPEN 



49 



to Jamtstown 



MAP 2 

 \ COULTERVILLE-CHINESE CAMP 



MAP SYMBOLS 

 | Lode and drift mines 

 ^ Placer and hydraulic (hyd) 



(Mine names in red) 

 sf^ Highway 49 

 d3 Historical markers 

 w Town buildings and roads 



MAP SYMBOLS FOR 

 BUILDING STONE 

 Adobe 

 ID Granite, granodiorite 



Greenstone (meta-andesite) 

 OD Limestone 



Rhyolite tuff 

 ) Schist 



Serpentine and talc schist 



Slate 



Tuffaceous sandstone 



Soapstone 



Unclassified rock 



Quarry site 



EXPLANATION 



Qal Alluvium 



Qm Glacial moraines 



Andesite breccia and conglom 

 TV erote Includes basalt and 

 Table Mtn latite 



Tvr Rhyolite tuff and ash 



Old river deposits Chiefly 

 Tfl Eocene quartz gravels, 

 gold-bearing 



sy Syenite 



d Granitic rocKs- granite 

 8ru lo d.or.te 



Porphyntic rocks quartz 

 and hornblende porphyries 



Meto-sediments. Chiefly 

 Monposa fofmotion slate, 

 graywacke, etc. 



Meto-volconics Chiefly Log 



town Ridge meto-andesite 



Milton formation tuft, red 



slate, qu 



and conglomerate 



Calaveras fofrnaMon mico- 

 Cc schist, phyllite, quartzife, 

 cloy slate, orgiliiie, etc. 



Note-Blank pattern box indicates 

 rock type is not shown on map 



