"shatter cone." YourDictionary, n.d. Web. 15 July 2019. <https://www.yourdictionary.com/shatter-cone>.
shatter cone. (n.d.). Retrieved July 15th, 2019, from https://www.yourdictionary.com/shatter-cone
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.