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The Glen Canyon Group is a geologic group of formations that is spread across the U.S. states of Nevada, Utah, northern Arizona, north west New Mexico and western Colorado. It is called the Glen Canyon Sandstone in the Green River Basin of Colorado and Utah. [1] There are four formations within the group.
Glen Canyon is a natural canyon carved by a 169.6-mile (272.9 km) ... 63 Group types of pottery, including Kayenta (Tusayan and Tsegi Orange Ware), ...
Wingate Sandstone frequently appears just below the Kayenta Formation and Navajo Sandstone, two other formations of the Glen Canyon group. Together, these three formations can result in immense vertical cliffs of 2,000 feet (610 meters) or more.
Mud flats developed on top of the eroded surface of the Glen Canyon Group, forming the Carmel Formation. The massive cliff-forming Entrada Sandstone in turn was created on top of the Carmel. A long period of erosion stripped away most of the San Rafael Group in the area along with any formations that may have been laid down in the Cretaceous ...
The group asserts that draining the reservoir would, among other things, save Lake Mead. According to GCI, Lake Powell currently loses up to 860,000 acre-feet (1.06 km 3 ) of water through evaporation and seepage each year which would otherwise be contained in Lake Mead, which currently has more than enough storage to contain the extra water.
Outcrops of the Glen Canyon Group's three formations are the most prominently exposed rock layers in the spine of the Waterpocket Fold. [7] Together they reach a thickness of 1,500 to 2,700 feet (460 to 820 m) in the area and their sandstones are seen in many of the arches, domes and slot canyons in Capitol Reef. [ 11 ]
The "Kayenta Fish Fauna" is the last one recovered from the Glen Canyon Group sequence and it is delimited mostly to the silty facies of the Lower-Middle Part of the formation. [8] This Fauna is rather scarce and delimited to several concrete locations with proper lacustrine or fluvial deposition, and are also scarce due to preservation bias. [8]
Glen Canyon Group/Kayenta Formation: Jurassic: Glen Canyon Group/Moenave Formation: Jurassic, Triassic: Glen Canyon Group/Navajo Sandstone: Jurassic: Glen Canyon Group/Navajo Sandstone Group/Nugget Formation: Jurassic: Glen Canyon Group/Wingate Formation: Triassic: Glen Canyon Group/Wingate Sandstone: Triassic: Great Blue Limestone ...