norite
norite A coarse-grained, basic igneous rock consisting of essential plagioclase feldspar, orthopyroxene (hypersthene or bronzite), and clinopyroxene (augite), with accessory ilmenite (see ACCESSORY MINERAL; and ESSENTIAL MINERAL). Orthopyroxene is dominant over clinopyroxene, and the plagioclase is a calcic type (labradorite or bytownite). Norites, like gabbros, are found as layers in many large, layered basic intrusions (see INTRUSIVE), as well as forming intrusions in their own right.
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Basic Rock , basic rock Rock with a relatively high concentration of iron, magnesium, and calcium, and with 45–53% of silica by weight. Examples include gabbro, w… essential , es·sen·tial / iˈsenshəl/ • adj. 1. absolutely necessary; extremely important: it is essential to keep up-to-date records. ∎ fundamental or central to… Basic , BASIC stands for Beginner's All-Purpose Symbolic Instruction Code, a computer programming language known for its simplicity. Many college students ar… basic oxygen process , BOS Chemical engineering basic oxygen steelmaking
Bos (cattle) See BOVIDAE.
Bos Computing business operating system diabase , dolerite (diabase, microgabbro) A dark-coloured, medium-grained igneous rock which contains plagioclase feldspar of labradorite composition and pyrox… Dacite , dacite A light-coloured, fine-grained igneous rock containing 63–70 wt.% SiO2, as well as plagioclase feldspar, alkali feldspar, quartz, biotite, and…
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norite