Igneous Rock Scaffold


Location Composition Rock
Intrusive
Mafic
 



Gabbro
Felsic
 



Granite

 
Location Composition Rock
Extrusive Mafic
 



Basalt
Felsic
 



Rhyolite

 
Texture Color Rock
Glassy Black, brown, red
 



Obsidian
Vesicular
(containing a great number of bubble holes formed by escaping gas)
Dark; heavy
 



Vesicular Basalt
Light
 



Pumice