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Greywacke

Sedimentary Rocks

Greywacke, or graywacke, is a variety of sandstone characterized by its hardness, dark color and poorly sorted angular grains of quartz, feldspar and small rock fragments set in a compact, clay-fine matrix. It is a texturally immature sedimentary rock whose matrix generally makes up more than fifteen percent of the rock by volume. This description is adapted from Wikipedia contributors under CC BY-SA 4.0; changes were made. https://creativecommons.org/licenses/by-sa/4.0/

Facts
Classification
Classification
Sedimentary Rock 1
Use
Sculpture and Ornamental 2
Wikipedia 'Greywacke' states this use (or use-bearing statement); earth5 pass.
Kind
Rock 1
Formation Class
Sedimentary, clastic (a hard, poorly sorted variety of sandstone with angular grains in a clay-fine matrix) 1
Greywacke
Filter Results1 entry

Ellsworth Mountains

Greywacke
Connections

Associated With

Ellsworth Mountains, Geological Formations
Source Ellsworth Mountains (Wikipedia)

Caused By

Sedimentation, Processes
Source Greywacke (Wikipedia)

Classified As

Sedimentary Rocks, Subcategories

In Discipline

Geology, Disciplines
Sources
1. Greywacke (Wikipedia)
Wikimedia Foundation
  • Lead section
    matrix materials generally constitute more than 15 percent of the rock by volume.
  • Lead section
    Greywacke or graywacke (German: Grauwacke 'a grey, earthy rock') is a variety of sandstone generally characterized by its hardness (6-7 on Mohs scale), dark color, and poorly sorted angular grains of quartz, feldspar, and small rock fragments or sand-size lithic fragments set in a compact, clay-fine matrix.
  • Caused By: Sedimentation, Article text
    It is a texturally immature sedimentary rock generally found in Paleozoic strata.
View the Source
2. Wikidata: Greywacke
Wikidata Q917545
Ellsworth Mountains (Wikipedia)
Associated With: Ellsworth Mountains, Article text, rock Greywacke
Quote, Associated With: Ellsworth Mountains, Article text, rock Greywacke
the Heritage Group is the Union Glacier Formation of ashflow tuff-lahar deposits, the Hyde Glacier Formation of graywacke-argillite-conglomerate, the Drake Icefall Formation of black shales and marble, the Conglomerate Ridge Formation of conglomerate and quartzite, the Liberty
View the Source
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