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Flatirons

View on map:39.988000°N 105.293000°W

Comments

As the Rocky Mountains (Green Mountain here) were pushed upward from magmas below, the sedimentary rocks, originally deposited horizontally in the central section of the continent by interior seas, were pushed up into almost vertical sequences.  Erosion eventually exposed the interior magmatic sequences in the Rockies and the vertical sedimentary rocks on the eastern fringes of the Rockies.    

Description


Flatirons

The Flatirons are rock formations in the western United States, near Boulder, Colorado, consisting of flatirons. There are five large, numbered Flatirons ranging from north to south (First through Fifth, respectively) along the east slope of Green Mountain (elev. 8,148 ft (2,484 m)), and the term "The Flatirons" sometimes refers to these five alone. Numerous additional named Flatirons are on the southern part of Green Mountain, Bear Peak, and among the surrounding foothills.

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