VESICULAR BASALT

 

Vesicular basalts are essentially intermediate lithologies between basalts and scorias.  Scorias are basaltic rocks with numerous small gas bubbles.  Vesicular basalts are basaltic rocks having a few relatively large gas bubbles.  Vesicular basalts are much denser than scorias (some scorias will float on water; vesicular basalts won’t do that).

 

 

Vesicular basalt (3.1 cm across)

 


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