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pyrolite

From Wiktionary, the free dictionary

English

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Etymology

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From pyro- +‎ -lite.

Noun

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pyrolite (countable and uncountable, plural pyrolites)

English Wikipedia has an article on:
Wikipedia
  1. A theoretical rock considered to be the best approximation of the composition of Earth's upper mantle, generally considered to be one part tholeiitic basalt and three parts dunite.
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