Date: 21/09/2021 Shift: 12:00 PM – 1:30 PM Q. No: 93

Geologists have subdivided the rocks comprising Mount Everest into three units called formations.

P. Each formation is separated from the other by low-angle faults, called detachments, along which they have been thrust southward over each other.
Q. The Qomolangma Formation, also known as the Jolmo Lungama Formation, runs from the summit to the top of the Yellow Band, about 8,600 m above sea level.
S. It consists of greyish to dark grey or white, parallel laminated and bedded, Ordovician limestone.
R. From the summit of Mount Everest to its base these rock units are the Qomolangma Formation, the North Col Formation, and the Rongbuk Formation.

Gansser first reported finding microscopic fragments of crinoids in this limestone.