Category:Porphyritic phonolite (Cripple Creek Diatreme)

Media in category "Porphyritic phonolite (Cripple Creek Diatreme)"

The following 3 files are in this category, out of 3 total.

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  Porphyritic phonolite (Cripple Creek Diatreme, Early Oligocene, 32 Ma; Ironclad area, Cripple Creek Mining District, Colorado, USA) 1.jpg 3,008 × 2,000; 5.15 MB
  
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  Porphyritic phonolite (Cripple Creek Diatreme, Early Oligocene, 32 Ma; Ironclad area, Cripple Creek Mining District, Colorado, USA) 2.jpg 3,008 × 2,000; 4.65 MB
  
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  Porphyritic phonolite (Cripple Creek Diatreme, Early Oligocene, 32 Ma; Ironclad area, Cripple Creek Mining District, Colorado, USA) 3.jpg 3,008 × 2,000; 4.96 MB