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

wellerr@cochise.edu    copyright 2011

 

basalt, scoria-1
Scoria is basalt with a high concentration of small vesicles (gas bubble holes).
Unlike pumice, which also has an abundance of tiny vesicles, scoria rarely floats.

 

basalt                                                                                                                                                 1a

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