ultrabasite

ultrabasite

[¦əl·trə′bā‚sīt]
(mineralogy)
References in periodicals archive ?
In this model, the Vodnany shear zone copied an older shear zone along which rock complexes of the lower crust represented by ultrabasites and granulites were uplifted to the Earth's surface.
The area is overlain by a thin irregular cover of Neogene and Quaternary sediments with igneous rocks represented by three intrusive complexes - early-mid Ordovician ultrabasites; early-mid Devonian granodiorites; and mid-late Devonian granites.
There are local inclusions and lens of ultrabasites, gabbroides and orthoamphibolites.