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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]
Pilot Rock in Petrified Forest National Park is underlain by Bidahochi Formation. The Pliocene to Late Neogene Bidahochi Formation lies at an elevation of about 6,300 feet (1,920 m) to 6,600 feet (2,012 m) at the southeast of the Colorado Plateau; the deposits are from Hopi Lake (also called Bidahochi Lake), and the deposits extend southwards to the region at the north perimeter of the White ...
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.
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.
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.
The Uinkaret volcanic field is an area of monogenetic volcanoes in northwestern Arizona, United States, located on the north rim of the Grand Canyon. [ 2 ] Lava flows from the Uinkaret volcanic field that have cascaded down into the Grand Canyon, damming the Colorado River , have been used to date the canyon's carving. [ 3 ]