Dolomite

Greywacke

Dolomite and Greywacke

Dolomite

Greywacke

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Definition

Dolomite is a sedimentary rock containing more than 50 percent of the mineral dolomite by weight

Greywacke is defined as a dark coarse-grained sandstone rock which contains more than 15 per cent clay

History

Origin

Southern Alps, France

Discoverer

Dolomieu

Unknown

Etymology

From French, from the name of Dolomieu (1750–1801), the French geologist who discovered the rock

From German Grauwacke, from grau grey + wacke

Class

Sedimentary Rocks

Sub-Class

Durable Rock, Medium Hardness Rock

Durable Rock, Hard Rock

Family

Group

Other Categories

Coarse Grained Rock, Fine Grained Rock, Medium Grained Rock, Opaque Rock

Fine Grained Rock, Opaque Rock

Texture

Earthy

Clastic

Color

Black, Brown, Green, Grey, Pink, White

Beige, Black, Brown, Cream, Dark Brown, Green, Grey, Light Green, Light to Dark Grey, Pink, Red, White, Yellow

Maintenance

Less

Durability

Durable

Water Resistant

✔ ✘

Scratch Resistant

✔ ✘

Stain Resistant

✔ ✘

Wind Resistant

✔ ✘

Acid Resistant

✔ ✘

Appearance

Glassy or Pearly

Dull

Uses

Architecture

Interior Uses

Decorative Aggregates, Homes, Interior Decoration

Decorative Aggregates, Floor Tiles, Flooring, Homes, Interior Decoration

Exterior Uses

Garden Decoration, Office Buildings

As Building Stone, As Facing Stone, Garden Decoration, Office Buildings, Paving Stone

Other Architectural Uses

Curbing, Whetstones

Industry

Construction Industry

As a Flux in the Production of Steel and Pig Iron, As a Sintering Agent in Steel Industry to process Iron Ore, As Dimension Stone, Cement Manufacture, for Road Aggregate, Making natural cement, Manufacture of Magnesium and Dolomite Refractories, Production of Glass and Ceramics, Serves as an Oil and Gas Reservoir rock

Building houses or walls, Cement Manufacture, Construction Aggregate, for Road Aggregate, Raw material for the manufacture of mortar

Medical Industry

Taken as a Supplement for Calcium or Magnesium

Antiquity Uses

Artifacts, Jewellery, Monuments, Sculpture, Small Figurines

Artifacts, Sculpture, Small Figurines

Other Uses

Commercial Uses

An Oil and Gas Reservoir, As a Feed Additive for Livestock, Gemstone, Metallurgical Flux, Production of Lime, Soil Conditioner, Source of Magnesia (MgO)

As armour rock for sea walls, Petroleum reservoirs, Sea Defence, Tombstones

Types

Boninite and Jasperoid

Greywacke

Features

Host Rock for Lead, Traps for subsurface fluids like Oil and Natural Gas., Zinc and Copper Deposits

Available in Lots of Colors and Patterns, Generally rough to touch, Non-vesicular, Veined

Archaeological Significance

Monuments

Famous Monuments

Sculpture

Famous Sculptures

Pictographs

Petroglyphs

Figurines

Fossils

Present

Formation

Dolomite rocks are originally deposited as calcite or aragonite rich limestone, but during diagenesis process, the calcite or aragonite is transformed into dolomite.

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.

Composition

Mineral Content

Clay Minerals, Pyrite, Quartz, Sulfides

Augite, Biotite, Calcite, Chlorite, Clay, Clay Minerals, Feldspar, Micas, Muscovite or Illite, Plagioclase, Pyroxene, Quartz

Compound Content

NaCl, CaO, Carbon Dioxide, Magnesium Carbonate, MgO

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

Transformation

Metamorphism

✔ ✘

Types of Metamorphism

Burial Metamorphism, Cataclastic Metamorphism, Contact Metamorphism

Weathering

✔ ✘

Types of Weathering

Biological Weathering, Chemical Weathering

Erosion

✔ ✘

Types of Erosion

Coastal Erosion, Sea Erosion, Wind Erosion

Properties

Physical Properties

Hardness

3.5-46-7

1 7

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Grain Size

Medium to Fine Coarse Grained

Angular and Fine

Fracture

Conchoidal

Streak

White

Porosity

Less Porous

Highly Porous

Luster

Vitreous and Pearly

Dull

Compressive Strength

140.00 N/mm²120.00 N/mm²

0.15 450

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Cleavage

Perfect

Toughness

2.6

Specific Gravity

2.8-32.2-2.8

0 8.4

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Transparency

Transparent to Translucent

Opaque

Density

2.8-2.9 g/cm³2.6-2.61 g/cm³

0 1400

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Thermal Properties

Specific Heat Capacity

0.92 kJ/Kg K0.71 kJ/Kg K

0.14 3.2

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Resistance

Heat Resistant, Pressure Resistant, Wear Resistant

Heat Resistant, Impact Resistant, Pressure Resistant

Reserves

Deposits in Eastern Continents

Asia

China, India

China, India, Kazakhstan, Mongolia, Russia, Uzbekistan

Africa

Morocco, Namibia

Namibia, Nigeria, South Africa

Europe

Austria, Italy, Romania, Spain, Switzerland

Austria, Denmark, Germany, Great Britain, Netherlands, Norway, Poland, Sweden, Switzerland, United Kingdom

Others

Greenland

Deposits in Western Continents

North America

Mexico, USA

Canada, USA

South America

Brazil, Colombia

Brazil

Deposits in Oceania Continent

Australia

New South Wales, Queensland, Yorke Peninsula

New South Wales, New Zealand

All about Dolomite and Greywacke Properties

Know all about Dolomite and Greywacke properties here. All properties of rocks are important as they define the type of rock and its application. Dolomite and Greywacke belong to Sedimentary Rocks.Texture of Dolomite is Earthy whereas that of Greywacke is Clastic. Dolomite appears Glassy or Pearly and Greywacke appears Dull. The luster of Dolomite is vitreous and pearly while that of Greywacke is dull. Dolomite is available in black, brown, green, grey, pink, white colors whereas Greywacke is available in beige, black, brown, cream, dark brown, green, grey, light green, light to dark grey, pink, red, white, yellow colors. The commercial uses of Dolomite are an oil and gas reservoir, as a feed additive for livestock, gemstone, metallurgical flux, production of lime, soil conditioner, source of magnesia (mgo) and that of Greywacke are as armour rock for sea walls, petroleum reservoirs, sea defence, tombstones.