Arkose

Anorthosite

Arkose and Anorthosite

Arkose

Anorthosite

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1 Definition

1.1 Definition

Arkose is a sedimentary rock, specifically a type of sandstone containing at least 25% feldspar

Anorthosite is a granular igneous rock composed largely of labradorite or plagioclase

1.2 History

1.2.1 Origin

France

Unknown

1.2.2 Discoverer

Alexandre Brongniart

Unknown

1.3 Etymology

From Auvergne region of France used by a French geologist Alexandre Brongniart in 1826 who applied this term to some feldspathic sandstones

From French anorthose plagioclase + -ite1

1.4 Class

Sedimentary Rocks

Igneous Rocks

1.4.1 Sub-Class

Durable Rock, Hard Rock

Durable Rock, Medium Hardness Rock

1.5 Family

1.5.1 Group

Not Applicable

Plutonic

1.6 Other Categories

Coarse Grained Rock, Opaque Rock

2 Texture

2.1 Texture

Clastic

Foliated, Glassy

2.2 Color

Reddish Brown

Black, Bluish - Grey, Brown, Green, Grey, Light Greenish Grey, Pink, White

2.3 Maintenance

Less

2.4 Durability

Durable

2.4.1 Water Resistant

✔ ✘

2.4.2 Scratch Resistant

✔ ✘

2.4.3 Stain Resistant

✔ ✘

2.4.4 Wind Resistant

✔ ✘

2.4.5 Acid Resistant

✔ ✘

2.5 Appearance

Rough and Dull

Layered, Banded, Veined and Shiny

3 Uses

3.1 Architecture

3.1.1 Interior Uses

Decorative Aggregates, Homes, Interior Decoration

Decorative Aggregates, Floor Tiles, Homes, Interior Decoration

3.1.2 Exterior Uses

Paving Stone, Office Buildings

As Building Stone, As Facing Stone, Garden Decoration

3.1.3 Other Architectural Uses

Whetstones

Curbing

3.2 Industry

3.2.1 Construction Industry

Cement Manufacture, Construction Aggregate, for Road Aggregate, Production of Glass and Ceramics, Raw material for the manufacture of mortar

As Dimension Stone, Cement Manufacture, for Road Aggregate

3.2.2 Medical Industry

Not Yet Used

3.3 Antiquity Uses

Artifacts, Sculpture, Small Figurines

3.4 Other Uses

3.4.1 Commercial Uses

In aquifers, Soil Conditioner, Source of Magnesia (MgO), Tombstones

Creating Artwork, Curling

4 Types

4.1 Types

Not Available

Proterozoic Anorthosite and Archean Anorthosite

4.2 Features

Available in Lots of Colors and Patterns, Generally rough to touch, Is one of the oldest rock

Generally rough to touch, Is one of the oldest rock

4.3 Archaeological Significance

4.3.1 Monuments

Not Yet Used

4.3.2 Famous Monuments

Not Applicable

4.3.3 Sculpture

Used

4.3.4 Famous Sculptures

Data Not Available

Not Applicable

4.3.5 Pictographs

Not Used

4.3.6 Petroglyphs

Not Used

4.3.7 Figurines

Used

4.4 Fossils

Present

Absent

5 Formation

5.1 Formation

Arkose rock forms from the weathering of feldspar-rich igneous or metamorphic rock, most commonly granitic rocks, which are primarily composed of quartz and feldspar.

Anorthosite is a phaneritic, intrusive igneous rock which is characterized by a predominance of plagioclase feldspar which is almost 90–100%, and a minimal mafic component.

5.2 Composition

5.2.1 Mineral Content

Calcite, Clay, Clay Minerals, Feldspar, Micas, Quartz

Amphibole, Clinopyroxene, Ilmenite, Magnetite, Olivine, Orthopyroxene

5.2.2 Compound Content

Aluminium Oxide, CaO, Iron(III) Oxide, Potassium Oxide, MgO, Sodium Oxide, Silicon Dioxide

Ca, CaO, Chromium(III) Oxide, MgO, Sulfur Trioxide

5.3 Transformation

5.3.1 Metamorphism

✔ ✘

5.3.2 Types of Metamorphism

Not Applicable

Cataclastic Metamorphism, Contact Metamorphism

5.3.3 Weathering

✔ ✘

5.3.4 Types of Weathering

Biological Weathering, Chemical Weathering, Mechanical Weathering

Biological Weathering

5.3.5 Erosion

✔ ✘

5.3.6 Types of Erosion

Coastal Erosion, Glacier Erosion, Water Erosion, Wind Erosion

Chemical Erosion, Wind Erosion

6 Properties

6.1 Physical Properties

6.1.1 Hardness

6-75-6

1 7

6.1.2 Grain Size

Coarse Grained

6.1.3 Fracture

Conchoidal

Irregular

6.1.4 Streak

White

6.1.5 Porosity

Highly Porous

Less Porous

6.1.6 Luster

Dull

Pearly to Subvitreous

6.1.7 Compressive Strength

NANA

0.15 450

6.1.8 Cleavage

Not Available

Irregular

6.1.9 Toughness

Not Available

6.1.10 Specific Gravity

02.62-2.82

0 8.4

6.1.11 Transparency

Opaque

Translucent

6.1.12 Density

Not Available2.7-4 g/cm³

0 1400

6.2 Thermal Properties

6.2.1 Specific Heat Capacity

NA0.84 kJ/Kg K

0.14 3.2

6.2.2 Resistance

Heat Resistant, Impact Resistant, Pressure Resistant

Heat Resistant, Impact Resistant, Pressure Resistant, Scratch Resistant, Wear Resistant

7 Reserves

7.1 Deposits in Eastern Continents

7.1.1 Asia

China, India, Kazakhstan, Mongolia, Russia, Uzbekistan

Not Yet Found

7.1.2 Africa

Namibia, Nigeria, South Africa

Not Yet Found

7.1.3 Europe

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

Bulgaria, France, Germany, Greece, Hungary, Italy, Latvia, Lithuania, Malta, Poland, Portugal, Romania, Slovenia, Spain, Sweden, The Czech Republic

7.1.4 Others

Greenland

Not Yet Found

7.2 Deposits in Western Continents

7.2.1 North America

Canada, USA

Canada

7.2.2 South America

Brazil

Bolivia, Colombia

7.3 Deposits in Oceania Continent

7.3.1 Australia

New South Wales, New Zealand

Central Australia, South Australia, Western Australia

All about Arkose and Anorthosite Properties

Know all about Arkose and Anorthosite properties here. All properties of rocks are important as they define the type of rock and its application. Arkose belongs to Sedimentary Rocks while Anorthosite belongs to Igneous Rocks.Texture of Arkose is Clastic whereas that of Anorthosite is Foliated, Glassy. Arkose appears Rough and Dull and Anorthosite appears Layered, Banded, Veined and Shiny. The luster of Arkose is dull while that of Anorthosite is pearly to subvitreous. Arkose is available in reddish brown colors whereas Anorthosite is available in black, bluish - grey, brown, green, grey, light greenish grey, pink, white colors. The commercial uses of Arkose are in aquifers, soil conditioner, source of magnesia (mgo), tombstones and that of Anorthosite are creating artwork, curling.