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A flood basalt (or plateau basalt [1]) is the result of a giant volcanic eruption or series of eruptions that covers large stretches of land or the ocean floor with basalt lava. Many flood basalts have been attributed to the onset of a hotspot reaching the surface of the Earth via a mantle plume . [ 2 ]
The Columbia River Basalt Group (including the Steen and Picture Gorge basalts) extends over portions of four states. The Columbia River Basalt Group (CRBG) is the youngest, smallest and one of the best-preserved continental flood basalt provinces on Earth, covering over 210,000 km 2 (81,000 sq mi) mainly eastern Oregon and Washington, western Idaho, and part of northern Nevada. [1]
The Flat Tops is a mountain range located in Colorado within the Routt and White River National Forests. [1] Much of the range is within the boundary of the Flat Tops Wilderness Area. While there are notable peaks in the Flat Tops, the dominant feature of the range is the high plateau from which the peaks arise.
The Grand Mesa is a large mesa in western Colorado in the United States. It is the largest flat-topped mountain in the world. [1] It has an area of about 500 square miles (1,300 km 2) and stretches for about 40 miles (60 km) east of Grand Junction between the Colorado River and the Gunnison River, its tributary to the south.
Next, the creek passes through two parcels of land (1,280 acres (5,200,000 square meters)) owned by the State of Colorado and managed by Colorado Parks and Wildlife. This State Trust Land is located in Fremont County and offers hunting, fishing, and wildlife viewing.
Lava flows extend 18 km (11 mi) to the west and 8 km (5.0 mi) to southeast of the cone, containing basalt primarily of the pahoehoe texture, with some a'a. The flows contain numerous lava tubes and caves. The cindercone volcano itself shows signs of oxidization prominent in the reddish/orange/brown appearance of much of the upper portions.
Location: Pitkin and Eagle counties: Coordinates: 1]: Type: reservoir: Part of: Colorado River Basin: Primary inflows: Fryingpan River: Primary outflows: Fryingpan River: Managing agency: United States Bureau of Reclamation: Built: 1968: Surface area: 997 acres (403 ha) [2]: Water volume: 101,280 acre⋅ft (124,930,000 m 3) [2]: Surface elevation: 2,369 m (7,772 ft) [1]: Ruedi Reservoir is a ...
Map of the Channeled Scablands. Bretz conducted research and published many papers during the 1920s describing the Channeled Scablands. His theories of how they were formed required short but immense floods – 500 cubic miles (2,100 km 3) – for which Bretz had no explanation.