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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 ...
The Decorah crater, also called the Decorah impact structure, is a possible impact crater located on the east side of the city of Decorah in Iowa, United States. It is thought to have been caused by a meteor about 200 metres (660 ft) wide which struck during the Middle Ordovician Period, circa 470 million years ago.
Few meteorites are large enough to create large impact craters. Instead, they typically arrive at the surface at their terminal velocity and, at most, create a small pit. NWA 859 iron meteorite showing effects of atmospheric ablation The impact pit made by a 61.9-gram Novato meteorite when it hit the roof of a house on 17 October 2012.
World map in equirectangular projection of the impact structures on the Earth Impact Database as of November 2017 (in the SVG file, hover over a structure to show its details) The Earth Impact Database is a database of confirmed impact structures or craters on Earth .
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 Karin family, formed 5.8 million years ago, and the Koronis family, formed 7.6 million years ago, account for a class of meteorites called H chondrites that represent 33% of known Earth ...
The Weaubleau structure is a probable meteorite impact site in western Missouri near the towns of Gerster, Iconium, Osceola, and Vista. It is believed to have been caused by a 1,200-foot (370 m) meteoroid between 335 and 340 million years ago [ 1 ] during the middle Mississippian Period (Latest Osagean to Earliest Meramecian ).
The Palisades fire and two other blazes nearby -- Eaton fire north of Pasadena and the Hurst fire in San Fernando Valley -- forced 70,000 Angelenos to abandon their homes and left at least five ...