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Some meteorite types are easier to find than others. Some meteorite types are degraded by weathering more quickly than others. [1] Some meteorites, especially iron meteorites, may have been collected by people in the past who recognized them as being unusual and/or useful, thereby removing them from the scientific record.
A few meteorites were found in Antarctica between 1912 and 1964. In 1969, the 10th Japanese Antarctic Research Expedition found nine meteorites on a blue ice field near the Yamato Mountains. With this discovery, came the realization that movement of ice sheets might act to concentrate meteorites in certain areas. [67]
This is a list of largest meteorites on Earth. Size can be assessed by the largest fragment of a given meteorite or the total amount of material coming from the same meteorite fall: often a single meteoroid during atmospheric entry tends to fragment into more pieces. The table lists the largest meteorites found on the Earth's surface.
The Fukang meteorite is a meteorite that was found in the mountains near Fukang, China in 2000. It is a pallasite —a type of stony–iron meteorite with olivine crystals. It is estimated to be 4.5 billion years old.
Meteorites When a meteoroid survives a trip through the atmosphere and hits the ground, it's called a meteorite. Most meteorites found on Earth come from shattered asteroids, according to NASA .
He estimated from the size of the crater that the meteorite had a mass of 10 million tons. [29] The metal content of the iron meteorites found around the crater was valued at the time at US$125/ton, so Barringer was searching for a lode he believed to be worth more than a billion 1903 dollars. [32] "By 1928, Barringer had sunk the majority of ...
The 12-mile (19 km) long Cumberland Gap consists of four geologic features: the Yellow Creek valley, the natural gap in the Cumberland Mountain ridge, the eroded gap in Pine Mountain, and Middlesboro crater. Middlesboro crater is a 3-mile (4.8 km) diameter meteorite impact crater in which Middlesboro, Kentucky, is located.
The Aletai meteorite, previously also known as the Armanty meteorite or Xinjiang meteorite, is one of the largest known iron meteorites, classified as a coarse octahedrite in chemical group IIIE-an. [b] In addition to many small fragments, at least five main fragments with a total mass over 74 tonnes have been recovered, the largest weighing about 28 tonnes.