Qomolangma Leucogranite

The Qomolangma Leucogranite represents the formation of an anatectic granite melt in the base of the lower crust during the Himalayan mountain building. It was formed ca. 22 Ma when the crustal thickening during the Himalayan Orogeny occurred.

Qomolangma Yellow Band marble

Rock from the highest place on Earth

This marble was originally a limestone formed in a shallow part of the Tethys Ocean and still shows primary sedimentary structure of alternating beds of limestone and shale-rich material inherited from its Ordovician past. Today, however, it is found in the summit area of Qomolangma, uplifted to 8500 m above sea level.

The consequence of such enormous mountain building forces is a prograde regional metamorphism during which the mineralogy of the rocks changed due to increasing temperature and pressure conditions. Thus the Ordovician limestones were metamorphosed to a green-coloured epidote-diopside marble, a rock exhibiting low-grade greenschist metamorphism.