For most meteorite falls, even those that occurred long ago or for which material has never received complete scientific characterization, it is known whether the object was a stone, stony iron, or iron meteorite. Here are the numbers and percentages of each type, based on literature data.234
The traditional way of subdividing meteorites (see Meteorites classification) is into irons, stony-irons, and two major groups of stony meteorites, chondrites and achondrites. For some of the less-studied stony meteorite falls, it is not known whether the object is chondritic; thus the number of meteorites that can be so grouped is 4% lower than shown above. These numbers are shown in the next table. One could make a slight correction for the undercounting of stony meteorites (e.g., the percentage of irons would decrease by a 0.2%), but this was not done.
Probably the most useful statistical breakdown of meteorite falls is by group, which is the fundamental way that meteorites are classified. About 5% of the meteorites in the table just above have not been sufficiently classified to allow them to be put into such groups. Again, a small adjustment could be made to the percentages to correct for this effect, but it does not greatly change the results. Note that a number of meteorite groups are only represented by a small number of falls; the percentages of falls belonging to these groups have a large uncertainty.
Gritsevich, Maria; Moilanen, Jarmo; Visuri, Jaakko; Meier, Matthias M. M.; Maden, Colin; Oberst, Jürgen; Heinlein, Dieter; Flohrer, Joachim; Castro-Tirado, Alberto J.; Delgado-García, Jorge; Koeberl, Christian; Ferrière, Ludovic; Brandstätter, Franz; Povinec, Pavel P.; Sýkora, Ivan; Schweidler, Florian (2024). "The fireball of November 24, 1970, as the most probable source of the Ischgl meteorite". Meteoritics & Planetary Science. 59 (7): 1658–1691. arXiv:2404.11989. Bibcode:2024M&PS...59.1658G. doi:10.1111/maps.14173. https://onlinelibrary.wiley.com/doi/10.1111/maps.14173 ↩
"Meteoritical Bulletin Database". Lunar and Planetary Institute. Retrieved August 9, 2018. http://www.lpi.usra.edu/meteor ↩
The NHM Catalogue of Meteorites http://internt.nhm.ac.uk/jdsml/research-curation/projects/metcat// ↩
MetBase http://www.metbase.de/ ↩
Kyrylenko, Ihor; Golubov, Oleksiy; Slyusarev, Ivan; Visuri, Jaakko; Gritsevich, Maria; Krugly, Yurij N.; Belskaya, Irina; Shevchenko, Vasilij G. (2023). "The First Instrumentally Documented Fall of an Iron Meteorite: Orbit and Possible Origin". The Astrophysical Journal. 953 (1): 20. Bibcode:2023ApJ...953...20K. doi:10.3847/1538-4357/acdc21. https://doi.org/10.3847%2F1538-4357%2Facdc21 ↩
Western Sahara is not a country. It is a disputed territory in the Maghreb region of North Africa, partially controlled by the self-proclaimed Sahrawi Arab Democratic Republic and partially Moroccan-occupied. /wiki/Maghreb ↩