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2005-05-25 19:19:16

Peridotite is a dense, coarse grained ultrabasic rock, consisting mainly of the minerals olivine and pyroxene. Peridotite is also a group of mantle derived igneous rocks. They all are ultramafic or ultrabasic meaning they contain less than 45% silica and are high in iron and magnesium. Members of the peridotite family include: Dunite - predominately composed of olivine, with minor enstatite pyroxene and chromite. Harzburgite - composed of olivine, enstatite, and minor chromite....

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Word of the Day
inwit
  • Inward knowledge; understanding; conscience.
The word 'inwit' comes from Middle English inwit ("mind, reason, intellect, understanding; soul, spirit; feeling; the collection of inner faculties; one of five inner faculties; one of the outer bodily senses.; inward awareness of right or wrong, conscience"), from Old English *inwitt, inġewitnes ("consciousness, conscience, knowledge, knowing"), equivalent to in- +‎ wit. (Wiktionary)
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