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List of impact structures in North America

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Summary

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This list includes all 60 confirmed impact structures in North America in the Earth Impact Database (EID). These features were caused by the collision of large meteorites or comets with the Earth. For eroded or buried craters, the stated diameter typically refers to an estimate of original rim diameter, and may not correspond to present surface features.

[[North America

Canada

Name	Location	Diameter (km)	Age (Ma/millions)
Brent	Ontario	3.8	396 ± 20
Carswell	Saskatchewan	39	115 ± 10
Charlevoix	Quebec	54	342 ± 15
Couture	Quebec	8	430 ± 25
Deep Bay	Saskatchewan	13	99 ± 4
Eagle Butte	Alberta	10
Elbow	Saskatchewan	8	395 ± 25
Gow	Saskatchewan	4
Haughton	Nunavut	23	39
Holleford	Ontario	2.35	550 ± 100
Île Rouleau	Quebec	4
La Moinerie	Quebec	8	400 ± 50
Lac à l'Eau Claire Est
Clearwater East	Quebec	26	460–470
Lac à l'Eau Claire Ouest
Clearwater West	Quebec	36	286.2 ± 2.6
Manicouagan	Quebec	100	214 ± 1
Maple Creek	Saskatchewan	6
Mistastin	Newfoundland and Labrador	28	36.4 ± 4
Montagnais	Atlantic continental shelf	45	50.50 ± 0.76
Nicholson	Northwest Territories	12.5
Pilot	Northwest Territories	6	445 ± 2
Pingualuit
formerly Chubb and Nouveau-Québec	Quebec	3.44	1.4 ± 0.1
Presqu'île	Quebec	24
Tunnunik	Northwest Territories	25	~130-350
Saint Martin	Manitoba	40	220 ± 32
Slate Islands	Ontario	30	about 450
Steen River	Alberta	25	91 ± 7
Sudbury	Ontario	250	1850 ± 3
Viewfield	Saskatchewan	2.5	190 ± 20
Wanapitei	Ontario	7.5	37.2 ± 1.2
West Hawk	Manitoba	2.44	351 ± 20
Whitecourt	Alberta	0.04

Mexico

Name	Location	Diameter (km)	Age (Ma/millions)	Coordinates
Chicxulub	Yucatan	170	64.98 ± 0.05

United States

Name	Location	Diameter (km)	Age (Ma/millions)
Ames	Oklahoma	16	470 ± 30
Avak	Alaska	12
Barringer	Arizona	1.19	0.049 ± 0.003
Beaverhead	Idaho, Montana	60	600
Calvin	Michigan	8.5	450 ± 10
Chesapeake Bay	Virginia	90	35.5 ± 0.3
Cloud Creek	Wyoming	7	190 ± 30
Crooked Creek	Missouri	7	320 ± 80
Decaturville	Missouri	6
Des Plaines	Illinois	8
Flynn Creek	Tennessee	3.8	360 ± 20
Glasford	Illinois	4
Glover Bluff	Wisconsin	8
Haviland	Kansas	0.015
Kentland	Indiana	7.24
Manson	Iowa	35	73.8 ± 0.3
Marquez	Texas	12.7	58 ± 2
Middlesboro	Kentucky	6
Newporte	North Dakota	3.2
Odessa	Texas	0.168
Red Wing	North Dakota	9	200 ± 25
Rock Elm	Wisconsin	6
Santa Fe	New Mexico	6-13
Serpent Mound	Ohio	8
Sierra Madera	Texas	13
Upheaval Dome	Utah	10
Wells Creek	Tennessee	12	200 ± 100
Wetumpka	Alabama	7.6	~83

Unconfirmed impact structures

Main article: List of possible impact structures on Earth

The following craters are officially considered "unconfirmed" because they are not listed in the Earth Impact Database. Due to stringent requirements regarding evidence and peer-reviewed publication, newly discovered craters or those with difficulty collecting evidence generally are known for some time before becoming listed. However, entries on the unconfirmed list could still have an impact origin disproven.

Name	Location	Diameter (km)	Age (years)	Probability
Alamo bolide impact	Nevada	unknown	367 million
Bow City	Alberta	8 km	70 million
Corossol	Quebec	4 km	2.6 million
Decorah crater	Iowa	5.6	470 million	last=Vastag	first=Brian	title=Crater found in Iowa points to asteroid break-up 470 million years ago	url=https://www.washingtonpost.com/national/health-science/crater-found-in-iowa-points-to-asteroid-break-up-470-million-years-ago/2013/02/18/545131f8-76d5-11e2-aa12-e6cf1d31106b_story.html?wprss=rss_national	access-date=19 February 2013	newspaper=Washington Post	date=18 February 2013}}
Gatun structure	Panama	2.7–3.0	20 million	last = Rajmon	first = David	title = Impact Database 2009.2	publisher = Impact Field Studies Group	date = October 10, 2009	url = http://impacts.rajmon.cz/data/Impact_database_2009_2.xls	format = Excel	access-date = December 28, 2009 }}
Pantasma	Nicaragua	10	1 million	4 (not probable)
Jeptha Knob	Kentucky	4.3	425 million	2 (probable)
Panther Mountain	New York state	10	375 million	2 (probable)
Snows Island	South Carolina	11	unknown	2 (probable)
Toms Canyon	New Jersey	22	35 million	2 (probable)
Victoria Island structure	California	5.5	37–49 million	2 (probable)
Weaubleau-Osceola	Missouri	15–20	325.0 ± 15.0 million	2 (probable)
Brushy Creek Feature	Louisiana	2	11,000 - 30,000 years	url=https://web.archive.org/web/20120321203607/http://www.enrg.lsu.edu/node/460	date=2012-03-21 }} Center for Energy Studies, Louisiana State University Baton Rouge, LA 70803. Retrieved March 27, 2011.

References

July 25, 2012. [http://news.usask.ca/2012/07/25/researcher-discovers-new-impact-crater-in-the-arctic/ "Researchers discover new impact crater in the Arctic,"] {{webarchive. link. (2013-02-25 ''University of Saskatchewan,'' Accessed August 8, 2012. NOTE: Geographic coordinates are in the comments section.)
King Jr., David T.. (April 23, 2010). "Wetumpka Crater". Alabama Humanities Foundation.
"Wetumpka's Coastal Impact Crater". City of Wetumpka.
Vastag, Brian. (18 February 2013). "Crater found in Iowa points to asteroid break-up 470 million years ago". [[Washington Post]].
U.S. Geological Survey. "Iowa Meteorite Crater Confirmed".
Rajmon, David. (March 2020). "Impact Database 2009.2". [[Impact Field Studies Group]].
{{cite gnis. 237071. Victoria Island
Heinrich, P.V. (2003) [http://www.searchanddiscovery.net/documents/2003/heinrich/index.htm Possible Meteorite Impact Crater in St. Helena Parish, Louisiana.] Search and Discovery Article. no. 50006. American Association of Petroleum Geologist, Tulsa, Oklahoma. Retrieved March 27, 2011.
Heinrich, P.V. (2003) [https://www.scribd.com/doc/19128408/Geology-of-Brushy-Creek-Impact-Crater-St-Helena-Parish-LA Origin of a Circular Depression and Associated Fractured and Shocked Quartz, St. Helena Parish, LA.] Transactions of the Gulf Association of Geological Societies. vol. 53, pp. 313-322.
Anonymous, 2008, [http://www.enrg.lsu.edu/node/460 LGS Researcher Featured in Meteor Crater News Story.] {{webarchive. link. (2012-03-21 Center for Energy Studies, Louisiana State University Baton Rouge, LA 70803. Retrieved March 27, 2011.)

Wikipedia Source

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