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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.
North Table Mountain is a popular scenic and recreational destination in the Denver metro area, and it is preserved as public open space by Jefferson County and the Access Fund. Recent and ongoing projects by Jefferson County Open Space have resulted in the construction of several new trails and eliminated large numbers of unofficial trails.
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Geologist J Harlen Bretz defined "scablands" in a series of papers written in the 1920s as lowlands diversified by a multiplicity of irregular channels and rock basins eroded into basalt. Flood waters eroded the loess cover, creating large anastomizing channels that exposed bare basalt and creating butte-and-basin topography.
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.
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 ...