They are then divided into three broad classes—H, L and LL—based on the iron content of the meteorites and the distribution of iron and magnesium in the major minerals olivine and pyroxene.

When a meteor smacks down it becomes a meteorite, and this one scattered ... in this block of mineral components including olivine, pyroxene, feldspar and glass gives it an age of roughly 4. ...

a group of 150-220 Ma Martian meteorites, typically basaltic in composition, coarse grained and enriched in incompatible elements. NWA 4468 is a basaltic sample with large pyroxene oikocrysts, ...