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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.
Wells Creek is an impact crater located near Cumberland City, Tennessee. It is 12 kilometers (7.5 mi) in diameter and the age is estimated to be 200 ± 100 Ma (million years old), placing it in the Jurassic or a neighboring period. The crater is exposed to the surface. The center of the crater contains some of the finest shatter cones in the ...
The Chesapeake Bay impact crater is a buried impact crater, located beneath the mouth of Chesapeake Bay, United States. It was formed by a bolide that struck the eastern shore of North America about 35.5 ± 0.3 million years ago, in the late Eocene epoch. It is one of the best-preserved "wet-target" impact craters in the world. [3]
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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.
The news about the discovery of the world’s largest asteroid impact crater is huge, if true—323-miles-in-diameter huge.. Researchers at University New South Wales (UNSW) believe they’ve ...
The crater is half a mile (one kilometer) wide and 500 to 777 feet (152 to 237 m) deep. The age of the crater is estimated from 2,000 to 7,000 years old. [1] In 2012, new evidence suggested that the crater may be as young as 800 years old, although this estimation was a lower bound, and it is still possible the crater is much older than that.