Ordinary chondrite

Ordinary chondrite
— Class —
Ordinary chondrite NWA 869
Compositional typeStony
TypeChondrite
Parent bodyunknown
Alternative namesO chondrites
Ordinary chondrite NWA 3189 sliced. Field of view c. 2.2 cm across. NWA 3189 has been classified as an LL3.2–3.4 ordinary chondrite ("LL" means very low total iron content; "3" refers to well-preserved chondrules – the rock has not been subjected to metamorphism intense enough to disrupt the chondritic texture). This chondrite has a multicolored mix of chondrules of varying size and shape.
Ochansk Meteorite, an ordinary chondrite with a fusion crust, found in 1887 in Russia.

The ordinary chondrites (sometimes called the O chondrites) are a class of stony chondritic meteorites. They are by far the most numerous group, comprising 87% of all finds.[1] Hence, they have been dubbed "ordinary". The ordinary chondrites are thought to have originated from three parent asteroids, with the fragments making up the H chondrite, L chondrite and LL chondrite groups respectively.[2]

  1. ^ Grady, Monica (2022). "Meteorites". The Catalogue of Meteorites. Natural History Museum. doi:10.5519/tqfuwle7. Retrieved 28 May 2020.
  2. ^ David Kring (21 November 2013). "Asteroid Initiative Workshop Cosmic Explorations Speakers Session". NASA (via YouTube). Retrieved 16 February 2019.