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Dakota Hogback

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The Dakota Hogback is a long hogback ridge at the eastern fringe of the Rocky Mountains that extends north-south from southern Wyoming through Colorado and into northern New Mexico in the United States. The ridge is prominently visible as the first line of foothills along the edge of the Great Plains. It is generally faulted along its western side, and varies in height, with gaps in numerous locations where rivers exit the mountains. The ridge takes its name from the Dakota Formation, a sandstone formation that underlies (the Dakota does not underlie the ridge. The much older Fountain does) the ridge. The hogback was formed during the Laramide orogeny, approximately 50 million years (50 my) ago, when the modern Rockies were created. The general uplift to the west created long faulting in the North American Plate, resulting in the creation of the hogback.

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Dakota Hogback Dakota Hogback 1 EvrmoorStreet Photographer Surrealist Flickr

While the hogback was created during the Laramide Orogeny, the geologic strata comprising the hogback are much older. For example, fossilized data such as dinosaur footprints have been observed in the exposed strata, created by dinosaurs which lived during the Jurassic Period approximately 150 my ago. Some of these footprints were attributed to the Diplodocus dinosaur and could be seen on the hogback west of Denver, Colorado as recently as the 1980s.

Dakota Hogback Dakota Hogback west of Denver Colorado USA 2 Eastwest Flickr

Brush fire along the dakota hogback near morrison colorado


Dakota Hogback Dakota Hogback west of Denver Colorado USA 1 Tilted se Flickr
Dakota Hogback Green Mountain Fault Lakewood Colorado
Dakota Hogback devilsbackbone
Dakota Hogback Dakota Hogback from FR415 overlook
Dakota Hogback dakota hogback Koloa the 2739 Albin Vega

References

Dakota Hogback Wikipedia


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