greywacke

As nouns the difference between grain and greywacke

is that grain is hate, hatred, disgust while greywacke is (geology) a hard dark sandstone with poorly sorted angular grains of quartz, feldspar, and small rock fragments in a compact, clay-fine matrix.

As nouns the difference between angular and greywacke

is that angular is (anatomy) a bone in the base of the lower jaw of many birds, reptiles, and fishes while greywacke is (geology) a hard dark sandstone with poorly sorted angular grains of quartz, feldspar, and small rock fragments in a compact, clay-fine matrix.

As an adjective angular

is relating to an angle or angles; having an angle or angles; forming an angle or corner; sharp-cornered; pointed; as in, an angular figure.

As nouns the difference between sandstone and greywacke

is that sandstone is a sedimentary rock produced by the consolidation and compaction of sand, cemented with clay etc while greywacke is a hard dark sandstone with poorly sorted angular grains of quartz, feldspar, and small rock fragments in a compact, clay-fine matrix.

Greywacke is a related term of graywacke.

Greywacke is a alternative form of graywacke.

As nouns the difference between graywacke and greywacke

is that graywacke is alternative form of greywacke while greywacke is a hard dark sandstone with poorly sorted angular grains of quartz, feldspar, and small rock fragments in a compact, clay-fine matrix.