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Crack in the Ground

Located at 43.32508°N 120.66520°W in Lake County, Oregon, Crack in the Ground is a volcanic fissure over two miles (3 km) long and up to 70 feet (21 m) deep in central Oregon, US.[1] The eruptions from the Four Craters Lava Field were accompanied by a slight sinking of the older rock surface, forming a shallow, graben-like structure about 3 kilometers wide and extending to the south into an old lake basin. Crack-in-the-Ground marks the western edge of this small, volcano-tectonic depression. The crack is the result of a tension fracture along a hingeline produced by the draping of Green Mountain lava flows over the edge of upthrown side of the concealed fault zone. It is located in the southwest corner of Four Craters Lava Field in the Deschutes National Forest. Hikers can walk the length of the main crack and explore its tributaries...From: http://en.wikipedia.org/wiki/Crack_in_the_Ground

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Filename
20090607_075 - HDR - Nature - Crack in the Ground, Central Oregon
Copyright
© Beau Owens Photography, all rights reserved.
Image Size
2291x3445 / 3.4MB
nature outdoors Oregon vacation travel
Contained in galleries
Rocks, Crack in the Ground
Located at 43.32508°N 120.66520°W in Lake County, Oregon, Crack in the Ground is a volcanic fissure over two miles (3 km) long and up to 70 feet (21 m) deep in central Oregon, US.[1] The eruptions from the Four Craters Lava Field were accompanied by a slight sinking of the older rock surface, forming a shallow, graben-like structure about 3 kilometers wide and extending to the south into an old lake basin. Crack-in-the-Ground marks the western edge of this small, volcano-tectonic depression. The crack is the result of a tension fracture along a hingeline produced by the draping of Green Mountain lava flows over the edge of upthrown side of the concealed fault zone. It is located in the southwest corner of Four Craters Lava Field in the Deschutes National Forest. Hikers can walk the length of the main crack and explore its tributaries...From: http://en.wikipedia.org/wiki/Crack_in_the_Ground