The Dakota Sandstone (also Cockrum Sandstone, Dakota Formation) is a general term for an ill-defined early Cretaceousformation of the Rocky Mountains and Great Plains. It consists of sandy, shallow-marine deposits with intermittent mud flat sediments, and occasional stream deposits.[1],[2] It is an important aquifer in some areas of the Great Plains.[3],[4] The Cretaceous Period is one of the major divisions of the geologic timescale, reaching from the end of the Jurassic Period (i. ... This article is about the military unit. ... Moraine Lake, and the Valley of the Ten Peaks, Banff National Park, Alberta, Canada The Rocky Mountains, often called the Rockies, are a broad mountain range in western North America. ... The Great Plains is the broad expanse of prairie which lies east of the Rocky Mountains in the United States and Canada. ... For other uses, see Sand (disambiguation). ... Marine is an umbrella term for things relating to the ocean, as with marine biology, marine geology, and as a term for a navy, etc. ... In computer gaming, a MUD (Multi-User Dungeon or Domain or Dimension) is a multi-player computer game that combines elements of role-playing games, hack and slash style computer games and social chat rooms. ... A running stream. ... An aquifer is an underground layer of water-bearing permeable rock or unconsolidated materials (gravel, sand, silt, or clay) from which groundwater can be usefully extracted using a water well. ...
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