SHATTERCONES
Shattercones in rock from the 1.85 billion year-old Sudbury Impact
Structure in Ontario, Canada.
Shattercones are features developed in rocks by a powerful shock wave or
pressure front moving through during an impact event. They have a
three-dimensional cone-like structure, with the points of the cones directed
toward the shock wave origination site. Undisturbed shatterconed rocks
will have their cones pointing upward (toward space).
(CMNH, Cleveland Museum of Natural History, Cleveland,
Ohio, USA)