Porphyry Photos
Cochise College
Photos of Rocks       

Igneous Rocks
Geology Home Page
Roger Weller, geology instructor                       

wellerr@cochise.edu    copyright 2011   
 

granite porphyry-2

Mt. Whitney, California
Note large feldspar phenocryst.


porphyry                                                                                                                              whitney8e

Photo is copyright free for non-commercial educational uses. 
Just credit photo to R.Weller/Cochise College.