Renazzo (Italy). The best parent body candidate is 2 Pallas. CR chondrites observed falls: Al Rais Kaidun Renazzo Other famous CR chondrites: Dar al Gani 574 El Djouf 001 Northwest Africa 801 CH group "H" stands for "high metal" because CH chondrites may contain up to as much as 40% of metal. That makes them one of the most metal-rich of any of the chondrite groups, second only to the CB chondrites and some ungrouped chondrites such as NWA 12273. The first meteorite discovered was ALH 85085. Chemically, these chondrites are closely related to CR and CB groups. All specimens of this group belong only to petrologic types 2 or 3. CB group The group takes its name from the most representative member: Bencubbin (Australia). Although these chondrites contain over 50% nickel-iron metal, they are not classified as mesosiderites because their mineralogical and chemical properties are strongly associated with CR chondrites. CK group This group takes its name from Karoonda (Australia). These chondrites are closely related to the CO and CV groups. CO group The group takes its name from Ornans (France). The chondrule size is only about 0.15 mm on average. They are all of petrologic type 3. Famous CO chondrite falls: Ornans Kainsaz Warrenton Moss Famous finds: Dar al Gani 749 CL group Officially recognized in 2022 after minimum specimens (five) described. CL chondrites, named after type specimen(s) Loongana, are chondrite-rich, metal-rich, and volatile-poor. C ungrouped The most famous members: Tagish Lake Tarda Organic matter Ehrenfreund et al. (2001) found that amino acids in Ivuna and Orgueil were present at much lower concentrations than in CM chondrites (~30%), and that they had a distinct composition high in β-alanine, glycine, γ-ABA, and β-ABA but low in α-aminoisobutyric acid (AIB) and isovaline. This implies that they had formed by a different synthetic pathway, and on a different parent body from the CM chondrites. Most of the organic carbon in CI and CM carbonaceous chondrites is an insoluble complex material. That is similar to the description for kerogen. A kerogen-like material is also in the ALH84001 Martian meteorite (an achondrite). The CM meteorite Murchison has over 70 extraterrestrial amino acids and other compounds including carboxylic acids, hydroxy carboxylic acids, sulphonic and phosphonic acids, aliphatic, aromatic and polar hydrocarbons, fullerenes, heterocycles, carbonyl compounds, alcohols, amines and amides. See also Glossary of meteoritics List of meteorite minerals References Carbonaceous chondrites at The Encyclopedia