tachylites造句

• It is transparent and pure, lacking the iron oxide crystals dispersed in the more commonly occurring tachylite.
• Tachylites have the appearance of weather rather easily and by oxidation of their iron become dark brown or red.
• Particles of volcanic glass called tachylite were created as the water turned to steam and explosively fragmented the hot magma.
• Tachylite has also been identified as a material used in manufacturing flaked stone artefacts in archaeological sites in Europe, North America, and India.
• Tachylite is a type of volcanic opaque glass, and is applied to basalts with a glassy matrix that contain scattered small phenocrysts ( pyroxene, plagioclase, olivine ).
• A third mode of occurrence of tachylite is as the margins and thin offshoots of Saar district of Germany similar rocks occur, some of which have been described as weisselbergites ( from Weisselberg ).
• Tachylite artefacts have been noted in Aboriginal sites in Victoria from at least the 1920s, when W . . H Gill recorded its occurrence in a large stone artefact and camp site complex at Cape Liptrap.
• He published observations on the geology and mineralogy of Spain and Italy as well as that of central and northern Europe : he wrote on gypsum, pyrites, felspar, tachylite, cordierite and on some eruptive rocks, and devoted much attention to the crystals developed during metallurgical processes.
• "' Varioles "'are millimeter-to centimeter-scale, light-colored, globular to spherical structures, that are conspicuously observable within aphanitic, mafic igneous rocks, such as basalt, komatiite, and tachylite, that comprise either pillow lavas, subaerial lava flows, or volcanic dykes.
• I found a rather convoluted explanation of why the tablets are said to be made out of sapphire online, but compare " The LORD said to Moses,  Chisel out two stone tablets like the first ones . . . " I don't know if a stone like tachylite ( from rapidly cooled basaltic lava ) would give a usable surface, but if it did, the stone is described as being very brittle, which seems consistent with the smashing of the tablets . talk ) 17 : 48, 21 January 2011 ( UTC)