GEOLOGIC HISTORY OF THE SIERRAN GOLD BELT JENKINS 



29 



Fio. 4. View northwest across the covered bridge at Burns Ferry on the road to 

 Copperopolis. Tuolumne Table Mountain has been eroded through by the Tuolumne 

 River. 



Fio. 6. The very rough lava surface of the top of Tuolumne Table Mou 

 as seen west of Jamestown. 



^ 



FIG. 5. Old railroad cut through Table Mountain northwest of Jamestown. 

 Latite lava columns are exposed on the left. To the right is the schist rim of the old 

 channel which the lava occupies. The railroad has been dismantled since the picture 

 was taken. 



FIG. 7. Detail of lava columns exposed in railroad cut through Table Mountain 

 northwest of Jamestown. 



