Dotsero, Volcanic crater in Eagle County, Colorado, United States.
Dotsero is a volcanic crater in Eagle County, Colorado, with a diameter of about 750 meters (2,460 feet) and depth of about 76 meters (250 feet). The crater displays basaltic formations and reddish sandstone fragments that reveal the area's volcanic past.
The volcano experienced its last eruption approximately 4,150 years ago, creating scoria cones. This event left tephra deposits that remain visible in the landscape today.
Local tribes wove the volcanic formations into their oral traditions and spiritual beliefs. This connection to the land shaped the region's cultural understanding for generations.
The site is easily accessible via Interstate 70, with a dedicated exit leading to the recreation area. Access is free with no formal visitor restrictions.
The volcanic deposits contain fragments of oxidized sandstone from older rock layers beneath the surface. This mixture shows how the eruption brought material from different depths to the surface.
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