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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.
The EID lists fewer than ten such craters, and the largest in the last 100,000 years (100 ka) is the 4.5 km (2.8 mi) Rio Cuarto crater in Argentina. [2] However, there is some uncertainty regarding its origins [ 3 ] and age, with some sources giving it as < 10 ka [ 2 ] [ 4 ] while the EID gives a broader < 100 ka.
Meteor Crater, or Barringer Crater, is an impact crater about 37 mi (60 km) east of Flagstaff and 18 mi (29 km) west of Winslow in the desert of northern Arizona, United States. The site had several earlier names, and fragments of the meteorite are officially called the Canyon Diablo Meteorite , after the adjacent Canyon Diablo .
United States portal Wikimedia Commons has media related to Impact craters of the United States . This category includes articles on impact craters in the United States.
The impactor is considered to have been a stony meteorite about 2 km (1.2 mi) in diameter. The site at the time was the shore of a shallow inland sea, [ 7 ] the Western Interior Seaway . The impact disrupted granite , gneiss , and shales of the Precambrian basement as well as sedimentary formations of Paleozoic age, Devonian through Cretaceous .
The Middlesboro crater (or astrobleme) is a meteorite crater in Kentucky, United States. [2] It is named after the city of Middlesboro, Kentucky, which today occupies much of the crater. The crater is approximately 3 miles (about 5 km) wide and its age is estimated to be less than 300 million years . The impactor is estimated to have been about ...
It is the largest meteorite found in the United States and the sixth largest in the world. [ 6 ] [ 7 ] There was no impact crater at the discovery site; researchers believe the meteorite landed in what is now Canada or Montana , and was transported as a glacial erratic to the Willamette Valley during the Missoula Floods at the end of the last ...
As the trend in the Earth Impact Database for about 26 confirmed craters younger than a million years old shows that almost all are less than two km (1.2 mi) in diameter (except the three km (1.9 mi) Agoudal and four km (2.5 mi) Rio Cuarto), the suggestion that two large craters, Mahuika (20 km (12 mi)) and Burckle (30 km (19 mi)), formed only ...