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  I do feel rather strongly that the rock cycle is typically under-appreciated.   
  zombisexual : 
 
 erta_ale_g10437 (by  volcanodiscovery )

I do feel rather strongly that the rock cycle is typically under-appreciated.  

zombisexual:

erta_ale_g10437 (by volcanodiscovery)

The Environment & You

Who Eats Who