GEOLOGIC MAPS AND NOTES ALONG HIGHWAY 49 BOWEN AND CRIPPEN 



63 





MAP 5 

 MOKELUMNE HILL-PLYMOUTH 



MAP SYMBOLS FOR 

 BUILDING STONE 



["'; Adobe 



Q Granite, granodiorite 

 HE! Greenstone (meta-andesite) 

 CD Limestone 

 H Rhyolite tuff 



i Schist 



Serpentine and talc schist 

 S3 Slate 

 v, Tuffaceous sandstone 



" Soapstone 

 GD Unclassified rock 

 Quarry site 



EXPLANATION 



Odl Alluvium 



Qm Glacial moraines 



Andesite breccia and conglom- 

 Tv crate. Includes basalt and 

 Table Mln. latite 



Tvr Rhyolile tuff and ash 



Old river deposits Chiefly 

 Eocene quartz gravels, 

 gold-bearing 



Granitic rocks- granite 

 to diorite 



Ultra-basic rocks 

 chiefly serpentine 



QP Porphyritic rocks quartz 

 and hornblende porphyries. 



Meto-sedimenTs. Chiefly 

 Morrposa formation- state, 

 graywocke, etc. 



Jmv Meta " wolconics Chiefly Log- 

 town Ridge meta-andesite 



Milton formation tuff, red 

 slate, quartzite, limestone. 

 and conglomerate 



Meto-volcanics of 

 uncertain age 



Colaveras formation mico- 

 Cc schist, phyllite, quortzite, 

 cloy slate, argillite, etc. 



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 

 QO Historical markers 



Town buildings and roads 



to Mokelumne Hill 



