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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 ...
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.
If the team can determine the site is a crater formed by an ancient impact event, then the next step is researching just when it happened. Of the world’s roughly 200 impact craters, 31 are ...
Upheaval Dome is an enigmatic geological structure in San Juan County, Utah, United States, that has been variously interpreted as a meteorite impact structure or a salt dome. The structure lies 22 miles (35 km) southwest of the city of Moab, Utah , in the Island in the Sky section of Canyonlands National Park .
It lies within the states of Idaho and Montana. Estimated at 60 kilometers (37 mi) in diameter, it is the ninth largest impact crater on Earth. With an estimated age of 600 million years (Neoproterozoic), the impact's original shatter cones along the impact structure's perimeter provide some of the structure's only remaining visible evidence.
Just earlier this year, scientists studying a 2017 soil analysis from Curiosity’s ongoing mission in Gale Crater discovered an abundance of manganese in the soil—something that usually ...
The reidite found at the Rock Elm structure is the oldest known example of the mineral. [5] It has been found in other impact sites such as the Xiuyan crater in China; the Chesapeake Bay impact crater in Virginia, United States; and the Nordlinger Ries crater in Germany. [6]