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A volcanic crater is a bowl-shaped depression in the ground caused by volcanic activity, usually located above the volcano's vent. [11] During volcanic eruptions, molten magma and volcanic gases rise from an underground magma chamber, through a conduit, until they reach the crater's vent, from where the gases escape into the atmosphere and the magma is erupted as lava.
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]
crater wall, the downward-sloping portion of the crater crater floor, a more or less smooth, flat area, which as it ages accumulates small craters of its own central peak, found only in some craters with a diameter exceeding 26 km (16 mi); this is generally a splash effect caused by the kinetic energy of the impacting object being turned to ...
Following are the largest impact craters on various worlds of the Solar System.For a full list of named craters, see List of craters in the Solar System.The ratio column compares the crater diameter with the diameter of the impacted celestial body.
Although sometimes described as a crater, the feature is actually a type of sinkhole, as it is formed through subsidence and collapse rather than an explosion or impact. Compared to the thousands of volcanic eruptions that occur over the course of a century, the formation of a caldera is a rare event, occurring only a few times within a given ...
Satellite radar found the site on the northern coast of France, researchers said.
The mapping was done using magnetotellurics that measure the electrical conductivity of what lies below the Earth’s surface. Melted rock, magma, is extremely good at conducting electricity, so ...
This is a list of officially named craters in the Solar System as named by IAU's Working Group for Planetary System Nomenclature.As of 2017, there is a total of 5,223 craters on 40 astronomical bodies, which includes minor planets (asteroids and dwarf planets), planets, and natural satellites. [1]