limburgite

Century Dictionary and Cyclopedia

1. n. The name given by Rosenbusch to a rock which is related to peridotite, and consists chiefly of olivin and augite with some magnetite and apatite in a variable but largely vitreous magma. It is essentially a basalt destitute of feldspathic constituents. To specimens of this rock from Bohemia the name of magmabasalt was given by Bořicky.