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

wellerr@cochise.edu    copyright 2011
 

basalt, oxidized scoria-6
closer view
When exposed to a warm, humid environment, the iron minerals in basalt oxidize
to a red color (hematite).

  

basalt-scoria                                                                                                                                  2128
Photo is copyright free for non-commercial educational uses. 
Just credit photo to R.Weller/Cochise College.