aluminous
71Transparent slate — Slate Slate (sl[=a]t), n. [OE. slat, sclat, OF. esclat a shiver, splinter, F. [ e]clat, fr. OF. esclater to shiver, to chip, F. [ e]clater, fr. OHG. sleizen to tear, slit, split, fr. sl[=i]zan to slit, G. schleissen. See {Slit}, v. t., and cf.… …
72augite — noun Etymology: Latin augites, a precious stone, from Greek augitēs Date: 1804 1. a usually black or dark green mineral that consists of aluminous pyroxene and is found especially in igneous rocks 2. pyroxene • augitic …
73hornblende — noun Etymology: German Date: 1770 a mineral that is the common dark green to black variety of aluminous amphibole; broadly amphibole 2 • hornblendic adjective …
74pozzolana — or pozzolan noun Etymology: Italian pozzolana Date: circa 1706 finely divided siliceous or siliceous and aluminous material that reacts chemically with slaked lime at ordinary temperature and in the presence of moisture to form a strong slow… …
75Латерит — (от лат. later кирпич) красноцветные железистые или железисто глинозёмистые элювиальные образования, типичные для влажных тропических и субтропических областей. Термин «Л.» впервые применен английским геологом Ф. Бьюкененом (1807) для… …
76Biotite — is a common phyllosilicate mineral within the mica group, with the approximate chemical formula K(Mg, Fe)3AlSi3O10(F, OH)2. More generally, it refers to the dark mica series, primarily a solid solution series between the iron endmember annite,… …
77Spinel — General Category Oxide minerals Spinel group Chemical formula MgAl2O4 …
78Talc — magnesium silicate redirects here. For the synthetic form, see synthetic magnesium silicate. Talc Three pieces of Talc. General Category Silicate mineral …
79Schist — The schists constitute a group of medium grade metamorphic rocks, chiefly notable for the preponderance of lamellar minerals such as micas, chlorite, talc, hornblende, graphite, and others. Quartz often occurs in drawn out grains to such an… …
80Metamorphic rock — Metamorphic redirects here. For other uses, see Metamorphic (disambiguation). Quartzite, a form of metamorphic rock, from the Museum of Geology at University of Tartu collection. Metamorphic rock is the transformation of an existing rock type,… …
