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Fossil meteorite – a meteorite that was buried under layers of sediment before the start of the Quaternary period. Some or all of the original cosmic material has been replaced by diagenetic minerals. [3]: 320 (It is, however, not a fossil). Fusion crust – a coating on meteorites that forms during their passage through the atmosphere.
The 60-tonne, 2.7 m-long (8.9 ft) Hoba meteorite in Namibia is the largest known intact meteorite.[1]A meteorite is a rock that originated in outer space and has fallen to the surface of a planet or moon.
Meteorite classification may indicate that a "genetic" relationship exists between similar meteorite specimens. Similarly classified meteorites may share a common origin, and therefore may come from the same astronomical object (such as a planet, asteroid, or moon) known as a parent body. However, with current scientific knowledge, these types ...
Example of meteorite strewnfield: distribution ellipse of Pultusk meteorite A strewn field is the area where meteorites from a single fall are dispersed. [ 1 ] It is also often used for the area containing tektites produced by large meteorite impact.
Martian meteorites can be compared to analysis carried out by rovers (e.g. Curiosity). Meteorites can also be compared to spectral classes of asteroids. In order to identify the parent body of a class of meteorites, scientists compare their albedo and spectra with other known bodies. These studies show that some meteorite classes are closely ...
Hexahedrites are a structural class of iron meteorite. They are composed almost exclusively of the nickel – iron alloy kamacite and are lower in nickel content than the octahedrites . [ 1 ] The nickel concentration in hexahedrites is always below 5.8% and only rarely below 5.3%.
The Sikhote-Alin meteorite is the heaviest of these and was an observed fall, [7] while the Old Woman meteorite is, at 38 × 34 × 30 inches (970 × 860 × 760 mm) and 6,070 pounds (2,750 kg) originally, the largest meteorite found in California and the second largest found in the United States.
The Zacatecas Meteorite found in 1782 in Zacatecas Mexico, weighing 780kg. See also: Iron meteorite § Structural classification Octahedrites can be grouped by the dimensions of kamacite lamellae in the Widmanstätten pattern , which are related to the nickel content: [ 3 ]