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Greywacke vs Basalt - What's the difference?

greywacke | basalt |

As nouns the difference between greywacke and basalt

is that greywacke is a hard dark sandstone with poorly sorted angular grains of quartz, feldspar, and small rock fragments in a compact, clay-fine matrix while basalt is a hard mafic igneous rock of varied mineral content; volcanic in origin, it makes up much of the Earth's oceanic crust.

greywacke

English

(wikipedia greywacke)

Alternative forms

* graywacke

Noun

  • (geology) A hard dark sandstone with poorly sorted angular grains of quartz, feldspar, and small rock fragments in a compact, clay-fine matrix.
  • *2004 , (Richard Fortey), The Earth , Folio Society 2011, p. 177:
  • *:Endless bleak, rounded hills composed of shales and ribs of tough ‘greywackes ’ make up the Southern Uplands – all of such rocks were originally deposited under marine conditions.

    • Derived terms

    * metagreywacke, metagraywacke

    basalt

    English

    (wikipedia basalt)

    Noun

    (en noun)
  • (mineral) A hard mafic igneous rock of varied mineral content; volcanic in origin, it makes up much of the Earth's oceanic crust.
  • A type of unglazed pottery.

    • Derived terms

    * basaltic

    Anagrams

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