Definitions

from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun An igneous rock consisting almost entirely of plagioclase feldspar, especially the labradorite variety.

from The Century Dictionary.

  • noun In petrography, a granular or gneissoid igneous rock of eastern Canada, consisting chiefly of the plagioclase feldspar, labradorite.

from the GNU version of the Collaborative International Dictionary of English.

  • noun (Petrol.) A granular igneous rock composed almost exclusively of a soda-lime feldspar, usually labradorite.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun geology A phaneritic, intrusive igneous rock characterized by a predominance of plagioclase feldspar.

Etymologies

from The American Heritage® Dictionary of the English Language, 4th Edition

[French anorthose, a kind of feldspar (Greek an-, not; see a– + Greek orthos, straight) + –ite.]

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Examples

  • In the southwest the underlying bedrock is granite and gneiss, in the north and east there are magmatic rocks including reddish rapakivi granite, gabbro and anorthosite.

    Kvarken Archipelago High Coast, Finland and Sweden 2008

  • An anorthosite complex, such as those in Labrador, the Adirondacks, and Niger there's some anorthosite in southern California too.

    100 Things You've Done Meme: A Geologist's Version ReBecca Foster 2008

  • An anorthosite complex, such as those in Labrador, the Adirondacks, and Niger there's some anorthosite in southern California too.

    Archive 2008-12-01 ReBecca Foster 2008

  • To be precise, the scientists grew the marigolds in anorthosite, an earthly rock that is chemically very similar to the regolith of the Moon.

    Gardens Over the Moon 2008

  • Alternative sources of aluminum might someday include kaolin clay, oil shales, the mineral anorthosite, and even coal waste.

    Aluminum 2008

  • Later flights brought back a greater variety of specimens, including lighter-colored igneous rocks that were even older, called gabbros and anorthosite.

    First Man James R. Hansen 2005

  • Later flights brought back a greater variety of specimens, including lighter-colored igneous rocks that were even older, called gabbros and anorthosite.

    First Man James R. Hansen 2005

  • Later flights brought back a greater variety of specimens, including lighter-colored igneous rocks that were even older, called gabbros and anorthosite.

    First Man James R. Hansen 2005

  • Later flights brought back a greater variety of specimens, including lighter-colored igneous rocks that were even older, called gabbros and anorthosite.

    First Man James R. Hansen 2005

  • Michikamau, a direct distance of twenty miles and was the only anorthosite observed on the journey.

    The Long Labrador Trail Dillon Wallace 1901

Comments

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  • Italian: opposide of the southern side.

    March 17, 2018