Credits:
Created with images by epicioci - "stone romania mountain" • MariaGodfrida - "nature stone sandstone" • James St. John - "Rhyolite dikes (Tertiary) in Homestake Formation metamorphic rocks (Paleoproterozoic, 1.9-2.0 Ga), Rhyolite Peak, Homestake Mine open pit, Lead, Black Hills, South Dakota 5" • scott1346 - "devils tower nat'l monument"