Diabase Photos                         
Cochise College
Photos of Rocks
Igneous Rocks
Geology Home Page
Roger Weller, geology instructor                       



last edited:  1/1/7/16    number of photos:  6
A diabase has a basaltic composition;
it consists mostly of pyroxene and plagioclase feldspar. 
The plagioclase forms fairly well-shaped visible crystals
that are embedded in a thick, dark mass of pyroxene.

diabase:  1  2  3  4
diabase porphyry:  1  2


Photos are copyright free for non-commercial educational uses. 
Just credit photos to R.Weller/Cochise College.
copyright 2016-R.Weller