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In gaps between the kamacite and taenite lamellae, a fine-grained mixture called plessite is often found. An iron nickel phosphide, schreibersite, is present in most nickel-iron meteorites, as well as an iron-nickel-cobalt carbide, cohenite. Graphite and troilite occur in rounded nodules up to several cm in size. [2]
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.
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]
The meteorite Yamato 791197 was discovered in 1979 but its lunar origin was not recognised until 1984. [3] ALH A81005 was found in 1982 in the Allan Hills at the end of the Transantarctic Mountains, during a meteorite gathering expedition . [1]
The Old Woman Meteorite is the largest meteorite to have been found in California and the second largest in the United States. It was discovered in the Old Woman Mountains in southern California in late March 1976. [1] It is 38 inches (970 mm) long, 34 inches (860 mm) high, and 30 inches (760 mm) wide.
The Willamette Meteorite, officially named Willamette [3] and originally known as Tomanowos by the Clackamas Chinook [4] [5] Native American tribe, is an iron-nickel meteorite found in the U.S. state of Oregon. It is the largest meteorite found in the United States and the sixth largest in the world.
The NASA astronauts who became the first people to land on the moon's surface in the 1960s and 1970s also discovered a previously unknown lunar characteristic - it has an atmosphere, though quite ...
The meteorite is a roughly conical mass of iron about 21.875 inches (55.56 cm) in height, and 22.875 to 29.375 inches (58.10 to 74.61 cm) in base dimension, weighing 1,060 pounds (480 kg). [1] After discovery, the meteorite was sold to the Smithsonian Institution. [1] It has since been used in a wide variety of scientific studies. [2] [3] [4]
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