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The Laramie Formation is exposed around the edges of the Denver Basin and ranges from 400–500 feet (120–150 m) on the western side of the basin, and 200–300 feet (60–90 m) thick on the eastern side. It rests conformably on the Fox Hills Sandstone and unconformably underlies the Arapahoe Conglomerate.
Fox Hills Sandstone: Cretaceous: Fremont Formation: Ordovician: Glen Canyon Group/Navajo Sandstone: Jurassic: Glen Canyon Group/Wingate Sandstone: Triassic: Green ...
Chestnut Ridge is a broad anticline held up by the Devonian Ridgeley Member of the Old Port Formation, also made of sandstone and conglomerate. Broad Top , located north of Breezewood, is a plateau of relatively flat-lying rocks that are stratigraphically higher, and thus younger ( Mississippian and Pennsylvanian ), than most of the other rocks ...
The Lewis Shale is an olive-gray marine shale with some thin beds of claystone, siltstone, sandstone, and limestone. It was deposited in the Western Interior Seaway in the late Cretaceous. [1] The formation crops out in the Bighorn Basin, Green River Basin, Powder River Basin, San Juan Basin, and Wind River Basin.
The Upper Thermopolis Member was laid down conformably atop the Muddy Sandstone in the foreland basin's interior during the latter part of the Western Interior Seaway's second transgression. [50] [15] Washburne described the member as consisting of bluish-black shale, interbedded very occasionally with beds of volcanic ash and bentonite in the ...
Central Valley linebacker Adam Shroads (7) looks to drag down Avonworth sophomore running back Dimitri Velsans (34) during the Warriors' Western Hills Conference matchup against Avonworth on Sept ...
Sep. 2—MINERAL WELLS — Mineral Wells, in its home opener of the 2023 season, jumped out to a dominating lead over Western Hills Friday, and never looked back in the 36-0 victory. "We worked on ...
Aquifers of the United States Withdrawal rates from the Ogallala Aquifer.. This is a list of some aquifers in the United States.. Map of major US aquifers by rock type. An aquifer is a geologic formation, a group of formations, or a part of a formation that contains sufficient saturated permeable material to yield significant quantities of water to groundwater wells and springs.