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Beaverhead Shatter Cone Montana Idaho USA - 2.4 lb
The Beaverhead meteorite impact crater predates the Rocky Mountain orogeny. Tectonic activity has destroyed much of it's morphology. Its estimated diameter is 37 miles. The crater was named for the region where shatter cones were first discovered, in southwest Montana.
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: 170mm H X 125mm W X 45mm D, Weight: 1103 grams; 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 horse tailing seen on both sides, as photos are of the front and back.
Shatter cones from the Beaverhead impact crater make an important addition to any serious geological meteorite impact collection - as this crater is the second known largest in the USA, and the 9th largest in the world.
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