Graywacke vs Greywacke - What's the difference?
graywacke | greywacke | Alternative forms |
* {{quote-news, year=2007, date=December 12, author=Anthony Depalma, title=An Island in the Hudson, Plundered in Search of Indian Artifacts, work=New York Times
, passage=Hundreds of projectile points and ceramic pieces from the island are stored in the State Museum in Albany, and archaeologists found human bones at a burial site from the early Woodland period at the back of the rock shelter, a 45-foot-long overhang of graywacke , a local sandstone. }}
(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.
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.graywacke
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