Greywacke is defined as a dark coarse-grained sandstone rock which contains more than 15 per cent clay
From German Grauwacke, from grau grey + wacke
Fine Grained Rock, Opaque Rock
Beige, Black, Brown, Cream, Dark Brown, Green, Grey, Light Green, Light to Dark Grey, Pink, Red, White, Yellow
Decorative Aggregates, Floor Tiles, Flooring, Homes, Interior Decoration
As Building Stone, As Facing Stone, Garden Decoration, Office Buildings, Paving Stone
Building houses or walls, Cement Manufacture, Construction Aggregate, for Road Aggregate, Raw material for the manufacture of mortar
Artifacts, Sculpture, Small Figurines
As armour rock for sea walls, Petroleum reservoirs, Sea Defence, Tombstones
Available in Lots of Colors and Patterns, Generally rough to touch, Non-vesicular, Veined
Archaeological Significance
Graywacke rock is a type of sedimentary rock, which is also known as immature sandstone, which is indurated, dark grey and consisting of poorly sorted angular to sub-angular, sand-sized grains.
Augite, Biotite, Calcite, Chlorite, Clay, Clay Minerals, Feldspar, Micas, Muscovite or Illite, Plagioclase, Pyroxene, Quartz
Aluminium Oxide, NaCl, CaO, Chromium(III) Oxide, Iron(III) Oxide, FeO, Potassium Oxide, Magnesium Carbonate, MgO, MnO, Sodium Oxide, Phosphorus Pentoxide, Silicon Dioxide, Titanium Dioxide
Biological Weathering, Chemical Weathering
Coastal Erosion, Sea Erosion, Wind Erosion
Heat Resistant, Impact Resistant, Pressure Resistant
Deposits in Eastern Continents
China, India, Kazakhstan, Mongolia, Russia, Uzbekistan
Namibia, Nigeria, South Africa
Austria, Denmark, Germany, Great Britain, Netherlands, Norway, Poland, Sweden, Switzerland, United Kingdom
Deposits in Western Continents
Deposits in Oceania Continent
New South Wales, New Zealand
Learn more about Properties of Greywacke
What is Greywacke? In this section, we will learn more about properties of Greywacke i.e. physical and thermal properties. Physical properties of Greywacke include Color, Streak, Hardness, Structure, Cleavage, Fracture, Luster, Specific Gravity etc. The strength of Greywacke is 120.00 N/mm2. Streak of Greywacke is white while its cleavage is perfect. Luster of Greywacke is dull and its fracture is conchoidal. Greywacke is opaque in nature. Know all about Greywacke, What is Greywacke, its composition, features, facts and reserves in next sections.
Know about Composition of Greywacke
What is Greywacke composed of? Get to know about composition of Greywacke here. Greywacke definition gives information about the Formation of Greywacke and its composition.The composition of Greywacke can be further divided into mineral and compound content. The mineral content of Greywacke rock includes Augite, Biotite, Calcite, Chlorite, Clay, Clay Minerals, Feldspar, Micas, Muscovite or Illite, Plagioclase, Pyroxene, Quartz and The compound content of Greywacke rock includes Aluminium Oxide, NaCl, CaO, Chromium(III) Oxide, Iron(III) Oxide, FeO, Potassium Oxide, Magnesium Carbonate, MgO, MnO, Sodium Oxide, Phosphorus Pentoxide, Silicon Dioxide, Titanium Dioxide. Almost all rocks undergo transformation process. Know all about Greywacke rock in next section.