11. Hence, garnet peridotite must have been formed at great depth in the earth. 12. Layered peridotites are igneous sediments and form by mechanical accumulation of dense olivine crystals. 13. The crust and the relatively rigid peridotite below it make up the oceanic lithosphere. 14. These blocks of mantle peridotite and the metamorphic eclogites are exposed as ophiolite complexes. 15. The Wenatchee Mountains are mostly composed of peridotite . 16. Naturally reacts with peridotite rock in surface exposures of ophiolites, notably in Oman. 17. Rock types include picrite, peridotite , dunite, pyroxenite, gabbro and granophyre. 18. Peridot explains that it is superheated liquid peridotite , a material similar to peridots. 19. Only 0.6 % are syenites and 0.3 % peridotites and dunites. 20. The chromite bands found in peridotites are the world's major source of chromium.
