anorthosite definition

  • noun:
    • many different diorite consisting chiefly of feldspar.
    • A phaneritic, intrusive igneous rock characterized by a predominance of plagioclase feldspar.
    • A granular igneous stone composed very nearly solely of a soda-lime feldspar, often labradorite.
    • In petrography, a granular or gneissoid igneous stone of eastern Canada, consisting mainly of this plagioclase feldspar, labradorite.

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  • Sentence for "anorthosite"
    • In the southwest the underlying bedrock…
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