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shatter cone

noun, Geology
1.
a small, radially striated rock structure produced by intense shock, such as generated by meteorite impact.
Also called pressure cone.
Origin
1945-1950
1945-50
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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shatter-cone in Science
shatter cone
  (shāt'ər)   
A fractured, conical fragment of rock that has striations radiating outward from the apex. Shatter cones are believed to form when rocks are subjected to shock waves associated with a meteoric impact. They are typically between a few centimeters and a few meters long.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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