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A view through a coulee in Alberta, with steep but lower sides, and water in the bottom. Coulee, or coulée (/ ˈ k uː l eɪ / or / ˈ k uː l iː /), [1] is any of various different landforms, all of which are kinds of valleys or drainage zones. The word coulee comes from the Canadian French coulée, from French couler 'to flow'.
The Channeled Scablands are a relatively barren and soil-free region of interconnected relict and dry flood channels, coulees and cataracts eroded into Palouse loess and the typically flat-lying basalt flows that remain after cataclysmic floods within the southeastern part of Washington state.
When it was built, Grand Coulee Dam was the largest dam in the world, but it was only part of the irrigation project. Additional dams were built at the north and south ends of Grand Coulee, the dry canyon south of Grand Coulee Dam, allowing the coulee to be filled with water pumped up from the Columbia River.
No clear connection between the head of the coulee and major flood routes to the north, east, or west is known. Some researchers propose that floods from glacial Lake Missoula formed Moses Coulee, [2] while others suggest that subglacial floods from the Okanogan Lobe incised the canyon. [3] The mouth of Moses Coulee discharges into the Columbia ...
Grand Coulee is two canyons, with an open basin in the middle. The Upper Coulee, filled by Banks Lake, is 25 miles (40 km) long with walls 800 to 900 feet (240 to 270 m) tall. It links to the Columbia River at Grand Coulee Dam and leads southward, through the surrounding highlands. The entry to the coulee is 650 feet (200 m) above the Columbia.
Dry Falls is a 3.5-mile-long (5.6 km) scalloped precipice with four major alcoves, in central Washington scablands.This cataract complex is on the opposite side of the Upper Grand Coulee from the Columbia River, and at the head of the Lower Grand Coulee, northern end of Lenore Canyon. [1]
The Coulee Region is the southwestern part of the Driftless Area in Wisconsin. It is named for its numerous ravines. It is named for its numerous ravines. Never covered by ice during the last ice age , the area lacks the characteristic glacial deposits known as drift .
[2] Image of the Juan de Fuca Plate that produced the magnitude 8.7–9.2 Cascadia earthquake in 1700. Magnetic anomalies around the Juan de Fuca and Gorda Ridges, off the west coast of North America, color coded by age. There are some unusual features at the Cascade subduction zone. Where the Juan de Fuca Plate sinks beneath the North American ...