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Mistastin crater was created 36 million years ago by a violent asteroid impact. [9] The presence of cubic zirconia around the crater rim suggests that the impact generated temperatures in excess of 2,370 °C (4,300 °F) — roughly 43% that of the surface of the Sun and the highest crustal temperatures known on Earth [9] — and produced global changes that lasted for decades after the impact.
Less than ten thousand years old, and with a diameter of 100 m (330 ft) or more. 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]
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.
The projectile was probably a stony asteroid, at least 2 kilometres (1.2 mi) in diameter, and weighing an estimated 15 billion tonnes (17 billion short tons). The Mont des Éboulements, situated in the exact centre of the impact structure, is interpreted as the central uplift, a consequence of elastic rebound. [3]
[100] [101] The Chelyabinsk meteor was estimated to have caused over $30 million in damage. [102] [103] It is the largest recorded object to have encountered the Earth since the 1908 Tunguska event. [104] [105] The meteor is estimated to have an initial diameter of 17–20 metres and a mass of roughly 10,000 tonnes. On 16 October 2013, a team ...
When the meteor struck, this part of the Earth was covered by a shallow sea. The object, traveling at an estimated speed of 70,000 mph (110,000 km/h), created a crater in the Earth's crust. This created enormous pressures below the point of impact, which made the remnant of the meteorite recoil slightly, creating an uplift.
The Wetumpka impact crater is the only confirmed impact crater in Alabama, United States.It is located east of downtown Wetumpka in Elmore County.The crater is 4.7 miles (7.6 km) in diameter, and its age is estimated to be about 85 million years (late Cretaceous), [1] based on fossils found in the youngest disturbed deposits, which belong to the Mooreville Chalk Formation.
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 ).