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parent bodies. As a result, achondrites have distinct textures and mineralogies indicative of igneous processes. Achondrites account for about 8% of meteorites...

Chondrites Primitive achondrites Achondrites where irons and stony–irons are considered to be achondrites or primitive achondrites, depending on the group. Modern...

"Class") and lying between chondrites and achondrites. They are called primitive because they are achondrites that have retained much of their original...

of primitive achondrites. Accretion – the process in which matter of the protoplanetary disk coalesces to form planetesimals. Achondrite – a differentiated...

meteorites are a clan (subgroup) of achondrite meteorites. HED stands for "howardite–eucrite–diogenite". These achondrites came from a differentiated parent...

meteorites are achondrites (meaning they do not contain chondrules), some of which are similar to terrestrial igneous rocks. Most achondrites are also ancient...

melting and impact events and are grouped with the primitive achondrites and the achondrites. Iron meteorites are derived from planetary cores of asteroids...

primitive achondrites or as asteroidal achondrites. Like all primitive achondrites, they have similarities with chondrites and achondrites. Brachinites...

differentiated, meaning that they show signs of alteration. They are therefore achondrites. The stony-irons are divided into mesosiderites and pallasites. Pallasites...

called chondrites. Stony meteoroids without these features are called "achondrites", which are typically formed from extraterrestrial igneous activity;...

silicate minerals. Like all primitive achondrites lodranites share similarities with chondrites and achondrites. The lodranite group is named after Lodhran...

and nickel content. Non-metallic meteorites that lack chondrules are achondrites, which are believed to have formed more recently than chondrites. There...

and are often called enstatite achondrites. Their igneous origin separates them from primitive enstatite achondrites and means they originated in an...

accessible to scientists, in the form of over 1200 HED meteorites (Vestan achondrites), giving insight into Vesta's geologic history and structure. NASA Infrared...

Zellner, B.; et al. (1977). "The E asteroids and the origin of enstatite achondrites". Geochim. Cosmochim. Acta. 41 (12): 1759–67. Bibcode:1977GeCoA..41.1759Z...

stage between chondrites and achondrites and to name them amphoterites. We know now that LL chondrites and achondrites are quite different, so this name...

orthopyroxene, plagioclase, meteoric iron, and troilite. Like all primitive achondrites, acapulcoites have chemical composition and mineralogical similarities...

S. (2010). "Differentiation of Vesta and the parent bodies of other achondrites". J. Geophys. Res. Planets. 115 (E8). Bibcode:2010JGRE..115.8001G. doi:10...

materials rose to the surface. The compositions of some meteorites (achondrites) show that differentiation also took place in some asteroids (e.g. Vesta)...

(March 1993). "Modeling of S-type asteroid spectra using primitive achondrites and iron meteorites". Icarus. 102 (1): 107–116. Bibcode:1993Icar..102...