GEOLOGIC MAPS AND NOTES ALONG HIGHWAY 49 BOWEN AND CRIPPEN 



67 



fo Ploctrvillt 



MAP SYMBOLS FOR 

 BUILDING STONE 



1 Adobe 



1 Granite, granodiorite 



i Greenstone (meta-andesilel 



1 Limestone 



) Rhyolite tuff 

 IS) Schist 



> Serpentine and talc schist 



! Slate 



Tuffaceous sandstone 



1 Soapstone 



1 Unclassified rock 

 Quarry site 



MAP 6 

 PLYMOUTH-PLACERVILLE 



EXPLANATION 



Qal Alluvium 



Qm Glacial moraines 



TV 



erate Includes basalt and 

 Table Mtn latite 



Tvr Rhyolite luff and ash 



Old river deposits Chiefly 

 Tg Eocene quartz gravels, 

 gold-bearing 



ard Granitic rocks- granite 

 9 to diorite 



jp Ultro-bosic rocks 

 chiefly serpentine 



Q.P Porphyntic rocks quortz 



hp 



and hornblende porphyries 



Meta-sediments. Chiefly 

 I m Manposa formation slate, 

 graywacke, etc. 



Jmv Weta-volconics Chiefly Log 

 town Ridge meta-andesite 



Milton formation-tuff, red 

 JRTI slate, quortzite, limestone, 

 and conglomerate 



uncertain age 



Cc schist, phyllite, quortzite, 

 cloy slate, orgillite, etc. 



Is Calaveras limestone 



Note- Blank pattern box indicates 

 rock type is not shown on map. 



MAP SYMBOLS 



Lode and drift mines 

 Placer and hydraulic (hyd) 



(Mine names in red) 

 Highway 49 

 Historical markers 

 Town buildings and roads 



SCALE 



