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.
norite Activated charcoal used to decolorize solutions.
More From encyclopedia.com
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…
About this article
All Sources -
Updated Aug 08 2016 About encyclopedia.com content Print Topic
You Might Also Like