Beaverhead impact structure
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| Beaverhead impact structure | |
|---|---|
| File:Beaverhead shatter cone.jpg A shatter cone produced by the Beaverhead impact | |
| Impact crater/structure | |
| Confidence | confirmed[1] |
| Diameter | 60 kilometres (37 mi) |
| Age | 600 million years |
| Exposed | Yes |
| Drilled | No |
| Location | |
| Coordinates | Lua error in Module:Coordinates at line 489: attempt to index field 'wikibase' (a nil value). |
| Country | United States |
| State | Idaho, Montana |
| Lua error in Module:Location_map at line 411: Malformed coordinates value. | |
The Beaverhead impact structure is the second-largest impact structure within the U.S. It lies within the states of Idaho and Montana. Estimated at 60 kilometers (37 mi) in diameter, it is among the largest impact structures 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
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References
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Further reading
[edit | edit source]- 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
