Definitions

from The Century Dictionary.

  • noun The name of certain modern volcanic rocks of rather varied and uncertain composition.

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

  • noun (Geol.) An igneous rock consisting essentially of plagioclase and either leucite or nephelite, or both.

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

  • noun geology An igneous rock consisting essentially of plagioclase and either leucite or nephelite, or both.

Etymologies

from Wiktionary, Creative Commons Attribution/Share-Alike License

Ancient Greek

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Examples

  • Trenches were cut perpendicular to the strike of lithogic layering in a strongly altered tephrite/skarn breccia sequence and sampled an area of outcrop approximately 180 x 180 meters in size.

    Marketwire - Breaking News Releases 2010

  • Trenches were cut perpendicular to the strike of lithogic layering in a strongly altered tephrite/skarn breccia sequence and sampled an area of outcrop approximately 180 x 180 meters in size.

    Marketwire - Breaking News Releases 2010

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