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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.
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 ...
Its walls are approximately 5 km (3 mi) high, [4] parts of its floor are 10–12 km (6–7 mi) deep, and its central peak rises 6–8 km (3 + 1 ⁄ 2 –5 mi) above the crater floor. [2] If there were a crater of an equivalent scale on Earth it would be over 4,000 km (2,500 mi) in diameter – wider than Canada – with walls over 200 km (120 ...
The system takes its name from Honolulu, the capital of Hawaiʻi, [7] as craters are scattered in and around the city. [8] The volcanic system includes well-known landmarks of Honolulu such as Diamond Head , Koko Head , Punchbowl Crater , [ 3 ] Rabbit Island , Tantalus , [ 9 ] Hanauma Bay (notable as a snorkeling site) [ 10 ] and the Mokapu ...
The Earth Impact Database is a database of confirmed impact structures or craters on Earth. It was initiated in 1955 by the Dominion Observatory , Ottawa, under the direction of Carlyle S. Beals . Since 2001, it has been maintained as a not-for-profit source of information at the Planetary and Space Science Centre at the University of New ...
An impact crater is a depression in the surface of a solid astronomical body formed by the hypervelocity impact of a smaller object. In contrast to volcanic craters, which result from explosion or internal collapse, [2] impact craters typically have raised rims and floors that are lower in elevation than the surrounding terrain. [3]
This is a list of named geological features on Mimas, a moon that orbits the planet Saturn. Mimantean features are named after people and places in Arthurian legend or the legends of the Titans . The sole exception to this is Herschel Crater , named after William Herschel , the astronomer who discovered Mimas in 1789.
Koko Crater, Hanauma Bay and other nearby tuff cones form the Koko Rift Zone, which marks the latest episode of volcanic activity on the island of Oahu. [1] Radiocarbon dating suggests that the latest eruption within the Koko Rift Zone occurred 7,000 years ago, [ 1 ] although the validity of these results are disputed. [ 2 ]