The Nakhla meteorite fell in the Nile delta the morning of June 28, 1911. Nakhlites are igneous rocks formed in flows or intrusions on Mars. They are rich in augite and contain a portion of olivine, about 10% in the case of Nakhla itself.
Olivine grains in Nakhla and other nakhlites contain prominent dark flake-like inclusions. These are very thin symplectic intergrowths of augite and magnetite which exsolved from the olivine during cooling from high temperatures. They have specific orientations to the olivine crystal structure.