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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
Connections

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
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