kyanite

How To Use kyanite In A Sentence

• They have parallel bright shiny mica wrapping round large grains of pink garnet, brown staurolite, or blue kyanite.
• Relative to one another, kyanite forms in a lower temperature/higher pressure environment; andalusite forms in a lower temperature/lower pressure environment, and sillimanite forms in a higher temperature/higher pressure environment. Kyanite
• France and India also produce andalusite and kyanite, respectively. Kyanite
• The thick Thunderhead Sandstone (Upper Precambrian Great Smoky Group) in the Great Smoky Mountains along the Tennessee/North Carolina border was deformed and regionally metamorphosed during formation of the Appalachian Highlands, beginning in the so-called Devonian (that is, early in the Flood year).12-14 With increasing temperatures and pressures from northwest to southeast, the regional metamorphism produced in these sandstone layers a series of chemically and mineralogically distinct zones of schists and gneisses.15 These zones are named according to the first appearance of the distinctive metamorphic minerals which characterize them as the intensity of the metamorphism increased laterally—the biotite, garnet, staurolite, and kyanite zones. Ken Miller in Cleveland: WEBCAST ARCHIVE URLS - The Panda's Thumb
• Barrovian index minerals in pelites, such as kyanite and staurolite, are rare, and the mapping of isograds is largely dependent upon the mineral assemblages found in thin layers of calcareous psammite (calc-silicate pods).
• Outside we saw large tables covered high with specimens of kyanite in quartz.
• However, most kyanite occurs as bladed crystals without well-developed terminations.
• On the west of the second range we have great masses of kyanite or disthene, and on the flanks of the third and fourth a great deal of specular iron ore which is magnetic, and containing a very large percentage of the metal. Missionary Travels and Researches in South Africa
• Kyanite is also used to produce refractories for nonferrous (non-iron-bearing) metals. Kyanite
• A notable exception is andalusite-biotite assemblages in the Mulhacen nappe of the Nevado-Filabride complex, though even these are largely replaced by Alpine kyanite, staurolite and garnet.