Slumgullion Earthflow
| Slumgullion Earthflow | |
|---|---|
 | |
| Location | Hinsdale County, Colorado, USA |
| Nearest city | Lake City, Colorado |
| Coordinates | 37°59′30″N 107°15′25″W / 37.991665°N 107.25704°WCoordinates: 37°59′30″N 107°15′25″W / 37.991665°N 107.25704°W |
| Designated | 1983 |
Lake San Cristobal was created 700 years ago when the Slumgullion Earthflow created a dam.
The Slumgullion Earthflow in the San Juan Mountains in Hinsdale County, Colorado has been a National Natural Landmark since 1983. It is also a Colorado Natural Area and an Area of Critical Environmental Concern.[1][2][3]
The earthflow, a slow moving landslide, crawled down the valley about 700 years ago creating the 4 miles (6.4 km) long and 2,000 feet (610 m) wide mass.[1][2] The earthflow lies a few miles south east of Lake City.[2] The landmark site covers 1,291 acres (522 ha) and is owned by the US Forest Service and the Bureau of Land Management. It is "a striking example of mass wasting (the movement of large masses of earth material)." Lake San Cristobal was dammed by the earthflow.[1] The earthflow has been moving continuously for about 300 years over older stable rock.[3] It moves at a rate of about 7 meters (23 feet) per year.[4]
The area is a habitat for elk and deer.[2]
References
- ↑ 1.0 1.1 1.2 "Slumgullion Earthflow". Colorado Parks and Wildlife. Retrieved July 5, 2013.
- ↑ 2.0 2.1 2.2 2.3 "Slumgullion Earthflow". U.S. Department of the Interior - Bureau of Land Management. Retrieved July 5, 2013.
- ↑ 3.0 3.1 D.J. Varnes and W.Z. Savage, ed. (1996-update March 23, 2012). "Bulletin 2130 -The Slumgullion Earth flow: A Large-Scale Natural Laboratory". US Department of Interior - US Geological Survey. Retrieved July 5, 2013. Check date values in:
|date=(help) - ↑ Hagenauer, Beth (October 8, 2012). "NASA Conducts Airborne Study of Colorado Landslide". NASA Dryden Flight Research Center. Retrieved May 9, 2014.
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