Wikimedi'Òc

NPS colorado-national-monument-geologic-map.jpg - RKBot

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

Entrada Sandstone (Middle Jurassic; Red Canyon, Colorado National Monument, Colorado, USA) 1 (23992236055).jpg - Ser Amantio di Nicolao

Entrada Sandstone over Kayenta Formation (Jurassic; Red Canyon, Colorado National Monument, Colorado, USA) 1 (23992324685).jpg - Ser Amantio di Nicolao

Cavernous weathering in Entrada Sandstone (Middle Jurassic; Colorado National Monument, Colorado, USA) (23385369804).jpg - Ser Amantio di Nicolao

Morrison Formation over Wanakah Formation over Entrada Sandstone over Kayenta Formation over Wingate Sandstone (Jurassic; Colorado National Monument, Colorado, USA) (23987535436).jpg - Ser Amantio di Nicolao