Winonaites are a group of primitive achondrite meteorites. It is classified as a eucrite achondrite, a kind of stony meteorite. CHUR was determined by analysing chondrite and achondrite meteorites. E-type asteroids are asteroids thought to have enstatite (MgSiO) achondrite surfaces. HED meteorites are a clan (subgroup) of achondrite meteorites. Acapulcoites are a group of the primitive achondrite class of stony meteorites. The Winona meteorite is a primitive achondrite meteorite. A kerogen-like material is also in the ALH84001 Martian meteorite (an achondrite). An achondrite is a stony meteorite that does not contain chondrules. A technical name for ureilite would be olivine-pigeonite achondrite. Currently classified as an ungrouped enstatite achondrite its classification is still an ongoing scientific debate. They are the most common achondrite group with well over 100 distinct finds at present.