Friday, November 15, 2013

Lava Bombs

Lava bombs are cool, check this out...
inyo county geology - lava bomb

This is about 12" long and was formed from high to moderately fluid magma erupting from a cinder cone, which are piles of cinders formed from gaseous magma that generally flies into little pieces and piles up along the edge forming a cone.  Larger blobs of magma are thrown high into the air by the explosive nature of the eruption; the molten magma forms into this aerodynamic shape, solidifies, and falls to the rim of the volcano. This example is among a group called Spindle, fusiform, or almond/rotational bombs.  More information can be found here.

Great examples have been found here on Red Mountain south of Crater Mountain south of Big Pine, CA...
inyo county geology - cinder cone
We recently took some friend to the cone and ended up finding a huge bomb imbedded in the consolidated cinders on the SW slope...
inyo county geology - lava bomb

 On the north side are some incredible collections of lichen set on a canvas of red.  I don't think I have ever seen so many colors of lichen together at one spot...
inyo county geology - lichen
The Eastern Sierra is home to textbook examples of volcanism.  Climbing these cones offers incredible vistas of the Sierra Nevada and the Owens Valley. 

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