Beaverhead impact structure
Beaverhead impact structure | |
---|---|
Impact crater/structure | |
Confidence | confirmed[1] |
Diameter | 60 kilometres (37 mi) |
Age | 600 million years |
Exposed | Yes |
Drilled | No |
Location | |
Coordinates | 44°36′N 113°0′W / 44.600°N 113.000°W |
Country | United States |
State | Idaho, Montana |
The Beaverhead impact structure is the second largest
impact crater on Earth
.
With an estimated age of 600 million years (Neoproterozoic), the impact's original shatter cones along the impact structure's perimeter provide some of the structure's only remaining visible evidence.
It is named for the Beaverhead region of southwestern Montana in which it was first discovered.
See also
- Chesapeake Bay impact crater
- List of impact craters in North America
References
- ^ "Beaverhead". Earth Impact Database. Planetary and Space Science Centre University of New Brunswick Fredericton. Retrieved 2015-01-02.
Further reading
- Carr, J and Link, PK, 1999, Neoproterozoic conglomerate and breccia in the formation of Leaton Gulch, Grouse Peak, northern Lost River Range, Idaho: Relation to Beaverhead Impact Structure, in Hughes, S.S., and Thackray, G.D., eds., Guidebook to the Geology of Eastern Idaho: Pocatello, Idaho Museum of natural History, p. 21-29.
- Aerial Exploration of the Beaverhead crater