... are of post-Archean age. More exactly their age can be estimated from indirect evidence, mainly from paleomagnetic data. Comparison of paleomagnetic and petrographic data for two types of ultrabasites (clinopyroxenites and koswites) helped to refine their paleomagnetic characteristics. The obtained paleopole...

... large dip angles, and are hosted by dunite that varies to peridotite. The name ‘kosvite’ (or ‘koswite’), after the Kos'vinskiy Kamen' complex in the northern Urals, pertains to a specific variety of magnetite-rich clinopyroxenite, or olivine-bearing clinopyroxenite ( Duparc and Pearce, 1901 ). (2...

..., and Chad) are isometric bodies with subvertical contacts and an intricate zoned-ring structure. In their cores, there are serpentinous chromite-bearing dunite cores surrounded first by chromite-bearing olivinites, clinopyroxenites (or phlogopite–pyroxenites), and peridotites and then by koswites, magnetite...

... and koswites of the Konder Massif (from their paleomagnetic characteristics). A.S. Karetnikov . . . . . . . . . . . . . . . . . . . . . . . . . . . Natural and experimental conditions of formation of coarse-grained precious opal (nucleation and number of centers of supramolecular crystallization). D.V. Kalinin...

.... There are also many boulders and pebbles of magnetite-rich clinopyroxenite (‘koswite’) with ilmenite, apatite and kaersutite. The clinopyroxenite from Darya is similar to that of the Kondyor dyke complex ( Nekrasov et al. , 1994 ). F ig . 3. Geological map of Darya river area. Palladium...

... ) proposed the following order of their emplacement (oldest to youngest): dunites; magnetite-bearing, perovskite-free clinopyroxenites (koswites); melilitolites ( sensu lato ); melteigite–shonkinite series rocks; melanephelinites and alkali picrites; jacupirangite–melteigite series rocks (characterised...