Meteorites can be broadly classified into four main categories:
1) Irons
2) Stony Irons (pallasites and mesosiderites)
3) Chondrites (stony meteorites having chondrules)
4) Achondrites (stony meteorites lacking chondrules)
Our website is set up to reflect these differences in classification.
Iron meteorites are from the core of an extinct planet or planetoid that was destroyed by a catastrophic impact event billions of years ago during the formation of our solar system. Most irons have an internal crystaline structure known as a Widmanstatten pattern, the like of which are only found in meteorites.
Pallasites are from the region at the interface between the planets core and its mantel and are composed of iron-nickel and olivine (peridot). They were torn away from their parent planetary body by a catastrophic impact billions of years ago.
Achondrites are stony meteorites that came from the crusts of planetary bodies or very large asteroids such as Vesta. They were broken away from their parent bodies by the impact of massive asteroids. Achondrites are were formed by igneous processes similar to those occurring on Earth today, and they lack chondrules.
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