by: Charles O’Dale

A-BC-DE-F-G-H,  I-J-K-L,  M-N-O,  P-Q-R,  S,  T-U-V, W-X-Y-Z

The petrographic and geochemical study of actual rocks from the potential impact structure will bring final confirmation of the presence of an impact structure. In case of a structure that is not exposed on the surface, drill-core samples are essential. Good materials for the recognition of an impact origin are various types of breccia and melt rocks. These rocks often carry unambiguous evidence for the impact origin of a structure in the form of shocked mineral and lithic clasts or a contamination from the extraterrestrial projectile.


Baratoux D., Reimold W.; The current state of knowledge about shatter cones – Meteoritics & Planetary Science, August 2016.

Gareth S. Collins, Gordon R. Osinski, Jay Melosh; The Impact-Cratering Process, Elements · February 2012

Greeley, R. 2011, Planetary Geomorphology, Cambridge.

Richard A. F. GRIEVE* and Ann M. THERRIAULT; Observations at terrestrial impact structures: Their utility in constraining crater formation, Meteoritics & Planetary Science 2003

Richard A. F. GRIEVE and Ann M. THERRIAULT; Observations at terrestrial impact structures: Their utility in constraining crater formation, Meteoritics & Planetary Science 39, Nr 2, 199–216 (2004)

Grieve, R.A.F. 2006, Impact Structures in Canada, Geological Association of Canada.

Morrison, D. 2007 The Impact Hazard: Advanced NEO Surveys and Societal Responses, Comet/Asteroid Impacts and Human Society 2007, pp 163-173

Wood, C.A. 2003, The Modern Moon, Sky Publishing