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

wellerr@cochise.edu    copyright 2011
 

basalt, oxidized scoria-2
closer view
When exposed to a warm, humid environment, the iron minerals in basalt oxidize
to a red color (hematite).

 

basalt                                                                                                                                             51

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

Specimen courtesy of Dave Dechant