Wikimedi'Òc

Rhyolite Colorado.JPG - Amcyrus2012

NPS great-sand-dunes-geologic-map.jpg - RKBot

Molybdenite vein in alkaline igneous host rock (Oligocene, 24-33 Ma; Climax Mine, Fremont Pass, Colorado, USA) 2 (19870159212).jpg - Ainz Ooal Gown

Carbonatite (Dreamers Hope Carbonatite, Early Cambrian, ~524 Ma; Road Gulch, Wet Mountains, Colorado, USA).jpg - Ser Amantio di Nicolao

Carbonatite (Gem Park Complex, Neoproterozoic or Cambrian; Gem Park, Fremont County, Colorado, USA) 1.jpg - Ser Amantio di Nicolao

Porphyritic andesite (Boulder County, Colorado, USA).jpg - Ser Amantio di Nicolao