Credits:

Created with images by Grand Canyon NPS - "Grand Canyon National Park: Grandviewite" • Arenamontanus - "Heathrow 5B Floor" • James St. John - "Stylolitized fossiliferous limestone" • James St. John - "Hyalite opal on porcellanite-buchite clinker (Wasatch Formation, Lower Eocene; coal fire metamorphism at 19 ka, Late Pleistocene; roadcut along west-bound Interstate 90's exit to Rt. 16, eastern side of Buffalo, Powder River Basin, northern Wyoming)" • James St. John - "Porcellanite clinker (Wasatch Formation, Lower Eocene; coal fire metamorphism at 19 ka, Late Pleistocene; roadcut along west-bound Interstate 90's exit to Rt. 16, eastern side of Buffalo, Powder River Basin, northern Wyoming, USA) 2" • James St. John - "Cuprite-tenorite-chrysocolla (Milpillas Orebody, Early Paleocene, 63 Ma; Milpillas Mine, Cananea Mining District, northern Sonora State, northwestern Mexico)" • ell brown - "The Roman Theatre - Arles" • James St. John - "Breccia-filled dissolution pit (Sandy Point Northeast roadcut, San Salvador Island, Bahamas) 1" • James St. John - "Volcanic tuff" • James St. John - "Porcellanite-buchite clinker (Wasatch Formation, Lower Eocene; coal fire metamorphism at 19 ka, Late Pleistocene; roadcut along west-bound Interstate 90's exit to Rt. 16, eastern side of Buffalo, Powder River Basin, northern Wyoming, USA) 1" • University of Exeter - "Breccia / conglomerate / sandstone" • University of Exeter - "Remfrey breccia pipe" • Grand Canyon NPS - "Grand Canyon National Park: Chalcoalumite & Phillipsbornite" • Grand Canyon NPS - "Grand Canyon National Park: Phillipsbornite & Osarizawaite" • Grand Canyon NPS - "Grand Canyon National Park: Grandviewite" • Grand Canyon NPS - "Grand Canyon National Park: Brochantite & Cyanotrichite" • Bija's photos - "IMG_2448 9 Fountain basin breccia corallina"