38 



tJNlVEESITT OF VIRGINIA PUBLICATIONS 



New England granites. 



^Yestern granites. 



-Average of 30 analyses. 



For convenience of comparison, ])artial anal.yses of three typical quartz 

 monzonites from the western United States are given below: 



Idaho-Hailey mine, Hailey, Idaho. 20tli An. Kept. U. S. Geol. Survey, 1900, 



p. 81. Professional Paper No. 14, p. 163. 

 Near San Miguel Peak, Telluride, Colorado. Telluride folio, U. S. Geological 



Survey, 1899, p. 6. Professional Paper No. 14, p. 165. 

 Nevada Falls Trail, Yoseniite Valley, California. .To. of Geol., 1899, Vol. VII, 



p. 152. Professional Paper No. 14, p. 167. 



