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

wellerr@cochise.edu    copyright 2007

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.


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