Marine band (geology)

(HD)The Mount Everest And Its Geological Story Documentary Video!

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• published: 07 Feb 2016
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(HD)The Mount Everest And Its Geological Story Documentary Video! -------------------------------------------------------------- Watch More Interesting Documentaries When The Earth STOPS Spinning - Full Documentary Video 720p (HD)! https://www.youtube.com/watch?v=6oS56ZOfMFk EARTH Under Water in Next 20 Years || Full Documentary Video (HD) ! https://www.youtube.com/watch?v=DpHq00M7p6M The War of 1812 - Second War of Independence Documentary Video ! https://www.youtube.com/watch?v=fZXJeAo86Po (HD) The Mystery And The Myth - Full Documentary Video. https://www.youtube.com/watch?v=jXeJUz3LkMA People Will Live On Mars & Never Come Back Documentary 720HD Video! https://www.youtube.com/watch?v=YJiUZ4csNNM Alexander the Great- Engineering an Empire Full Documentary video 720HD ! https://www.youtube.com/watch?v=0CjQ_DQicOI The War of 1812 - Second War of Independence Documentary Video ! https://www.youtube.com/watch?v=DMTH7Za4xcw ********************** Geologists have subdivided the rocks comprising Mount Everest into three units called "formations". Each formation is separated from the other by low-angle faults, called "detachments", along which they have been thrust southward over each other. From the summit of Mount Everest to its base these rock units are the Qomolangma Formation, the North Col Formation, and the Rongbuk Formation. From its summit to the top of the Yellow Band, about 8,600 m (28,200 ft) above sea level, the top of Mount Everest consists of the Qomolangma Formation, which has also been designated as either the Everest Formation or Jolmo Lungama Formation. It consists of grayish to dark gray or white, parallel laminated and bedded, Ordovician limestone inter layered with subordinate beds of recrystallised dolomite with argillaceous laminae and siltstone. Gansser first reported finding microscopic fragments of crinoids in this limestone. Later petrographic analysis of samples of the limestone from near the summit revealed them to be composed of carbonate pellets and finely fragmented remains of trilobites, crinoids, and ostracods. Other samples were so badly sheared and recrystallised that their original constituents could not be determined. A thick, white-weathering thrombolite bed that is 60 m (200 ft) thick comprises the foot of the "Third Step", and base of the summit pyramid of Everest. This bed, which crops out starting about 70 m (230 ft) below the summit of Mount Everest, consists of sediments trapped, bound, and cemented by the biofilms of micro-organisms, especially cyanobacteria, in shallow marine waters. The Qomolangma Formation is broken up by several high-angle faults that terminate at the low angle normal fault, the Qomolangma Detachment. This detachment separates it from the underlying Yellow Band. The lower five meters of the Qomolangma Formation overlying this detachment are very highly deformed.