| Name | Diameter [kilometres] | Age [Million years] | Geographical location | Coordinates |
| Bedout | ~ 200 km | 250.1 ± 4.5 Ma [Late Permian / Early Triassic] | Indian Ocean (Northwestern Australian coast) | |
| West Clearwater Lake | ≥36 km | 286.2 ± 2.2 (2.6) Ma [Early Permian] | Canada, Quebec | N56º 13', W74º 30' |
| Kentland | 13 km | <300 Ma [Late Carboniferous] | USA, Indiana | N40º 45', W87º 24' |
| Ternovka | 12 km | 330 Ma [Middle Carboniferous] | Ukraine, Dnepropetrovsk District | N48º 01', E33º 05' |
| Charlevoix | 54 km | 342 ± 15 Ma [Middle Carboniferous] | Canada, Quebeg | N47º 32', W70º 18' |
Note:
Although not confirmed, there seems to be some evidence of the another impact at the Permian/Triassic boundary.
Reference(s):
- Becker, L., Poreda, R. J., Basu, A. R., Pope, K. O., Harrison, T. M., Nicholson, C. & Iasky, R., 2004: Bedout: A Possible End-Permian Impact Crater Offshore of Northwestern Australia.
–iNet: Science Express: DOI: 10.1126/science.1093925, http://www.sciencemag.org/cgi/content/abstract/1093925 - Benton, M. J., 1997: Extinction, Triassic. pp. 231-235
in Currie, P. J., Padian, K, 1997: Encyclopedia of Dinosaurs.
–Academic press, New York, 1997. xxx-869. - Hodge, P., 1994: Meteorite craters and impact structures of the Earth. pp. 1-124
–Cambridge University Press, London, 1994 - Retallack, G. J., 1995: Permian-Triassic life crisis on land.
–Science: Vol. 267, pp. 77-80 - Retallack, G. J., Veevers, J. J. & Morante, R., 1996: Global coal gap between Permian-Triassic extinction and Middle Triassic recovery of peat-forming plants.
–Geological Society of America Bulletin: Vol. 108, #2, pp. 195-207 - Renne, P. R., Zichao, Z., Richards, M. A., Black, M. T., & Basu, A. R., 1995: Synchrony and causal relations between Permian-Triassic boundary crises and Siberian flood volcanism.
–Science: vol. 269, 8 September, pp. 1413-1416. - Smith, R. M. H. & Ward, P. D., 2001: Pattern of vertebrate extinctions across an event bed at the Permian-Triassic boundary in the Karoo Basin of South Africa.
–Geology: Vol. 29, #12, pp. 1147-1150 - Schmieder, M., Schwarz, W. H., Trieloff, M., Tohver, E., Buchner, E., Hopp, J. & Osinski, G. R., 2015: New 40Ar/39Ar dating of the Clearwater Lake impact structures (Québec, Canada) – Not the binary asteroid impact it seems?
–Geochimica et Cosmochimica Acta: Vol. 148, pp. 304-324 [doi: 10.1016/j.gca.2014.09.037] - Scotese, C. R. and McKerrow, W. S., 1990: Revised World maps and introduction. pp. 1-21
in McKerrow, W. S. and Scotese, C. R. (eds.), 1990: Paleozoic Palaeogeography and Biogeography.
–Geological Society Memoir: #12. - Smith, A. G., Smith, D. G. & Funnell, B. M. 1994: Atlas of Mesozoic and Cenozoic coastlines.
–Cambridge University Press, Cambridge, 1994. ix-99. - Ziegler, A. M., 1990: Phytogeographic patterns and continental configurations during the Permian world. pp. 363-379.
in McKerrow, W. S. and Scotese, C. R. (eds.), 1990: Paleozoic Palaeogeography and Biogeography.
–Geological Society Memoir: #12