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Beaverhead Shatter Cone Medium Montana USA
The Beaverhead meteorite impact crater predates the Rocky Mountain orogeny. Tectonic activity has destroyed much of it's morphology. It's estimated diameter is 37 miles. The crater was named for the region where shatter cones were first discovered, in southwest Montana. Shatter cones are the only remaining visible evidence found around the Beaverhead crater's perimeter, on the surface.
The evidence for impact for the Beaverhead Impact Structure resides in its having pseudotachylites, planar deformation features found in quartz, and shatter cones. The age of the impact is estimated to be Neoproterozoic (600 Ma).
Size: 193mm H X 170mm W X 110mm D, Weight: 5.4 lb; Ships with Certificate of Authenticity and information about shatter cones and the Beaverhead impact structure. Stands and photo cube not included. This shatter cone does lay down flat for displaying. Great horsetailing on both sides even in variable light.
Shatter cones from Beaverhead make an important addition to any serious geological meteorite impact collection, as this crater is the second known largest in the USA and the 10th largest in the world.
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