1 Definition
1.1 Definition
Anorthosite is a granular igneous rock composed largely of labradorite or plagioclase
Arkose is a sedimentary rock, specifically a type of sandstone containing at least 25% feldspar
1.2 History
1.2.1 Origin
1.2.2 Discoverer
Unknown
Alexandre Brongniart
1.3 Etymology
From French anorthose plagioclase + -ite1
From Auvergne region of France used by a French geologist Alexandre Brongniart in 1826 who applied this term to some feldspathic sandstones
1.4 Class
Igneous Rocks
Sedimentary Rocks
1.4.1 Sub-Class
Durable Rock, Medium Hardness Rock
Durable Rock, Hard Rock
1.5 Family
1.5.1 Group
1.6 Other Categories
Coarse Grained Rock, Opaque Rock
Coarse Grained Rock, Opaque Rock
2 Texture
2.1 Texture
2.2 Color
Black, Bluish - Grey, Brown, Green, Grey, Light Greenish Grey, Pink, White
Reddish Brown
2.3 Maintenance
2.4 Durability
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
Layered, Banded, Veined and Shiny
Rough and Dull
3 Uses
3.1 Architecture
3.1.1 Interior Uses
Decorative Aggregates, Floor Tiles, Homes, Interior Decoration
Decorative Aggregates, Homes, Interior Decoration
3.1.2 Exterior Uses
As Building Stone, As Facing Stone, Garden Decoration
Paving Stone, Office Buildings
3.1.3 Other Architectural Uses
3.2 Industry
3.2.1 Construction Industry
As Dimension Stone, Cement Manufacture, for Road Aggregate
Cement Manufacture, Construction Aggregate, for Road Aggregate, Production of Glass and Ceramics, Raw material for the manufacture of mortar
3.2.2 Medical Industry
Not Yet Used
Not Yet Used
3.3 Antiquity Uses
Artifacts, Sculpture, Small Figurines
Artifacts, Sculpture, Small Figurines
3.4 Other Uses
3.4.1 Commercial Uses
Creating Artwork, Curling
In aquifers, Soil Conditioner, Source of Magnesia (MgO), Tombstones
4 Types
4.1 Types
Proterozoic Anorthosite and Archean Anorthosite
Not Available
4.2 Features
Generally rough to touch, Is one of the oldest rock
Available in Lots of Colors and Patterns, Generally rough to touch, Is one of the oldest rock
4.3 Archaeological Significance
4.3.1 Monuments
Not Yet Used
Not Yet Used
5.1.2 Famous Monuments
Not Applicable
Not Applicable
5.1.3 Sculpture
5.1.5 Famous Sculptures
Not Applicable
Data Not Available
5.1.7 Pictographs
5.1.9 Petroglyphs
5.2.2 Figurines
5.3 Fossils
6 Formation
6.1 Formation
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.
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.
6.3 Composition
6.3.1 Mineral Content
Amphibole, Clinopyroxene, Ilmenite, Magnetite, Olivine, Orthopyroxene
Calcite, Clay, Clay Minerals, Feldspar, Micas, Quartz
6.3.2 Compound Content
Ca, CaO, Chromium(III) Oxide, MgO, Sulfur Trioxide
Aluminium Oxide, CaO, Iron(III) Oxide, Potassium Oxide, MgO, Sodium Oxide, Silicon Dioxide
6.4 Transformation
6.4.1 Metamorphism
6.4.2 Types of Metamorphism
Cataclastic Metamorphism, Contact Metamorphism
Not Applicable
6.4.3 Weathering
6.4.4 Types of Weathering
Biological Weathering
Biological Weathering, Chemical Weathering, Mechanical Weathering
6.4.5 Erosion
6.4.6 Types of Erosion
Chemical Erosion, Wind Erosion
Coastal Erosion, Glacier Erosion, Water Erosion, Wind Erosion
7 Properties
7.1 Physical Properties
7.1.1 Hardness
7.1.2 Grain Size
Coarse Grained
Coarse Grained
7.1.3 Fracture
7.1.4 Streak
7.1.5 Porosity
Less Porous
Highly Porous
7.1.6 Luster
Pearly to Subvitreous
Dull
7.1.7 Compressive Strength
7.1.8 Cleavage
7.1.9 Toughness
Not Available
Not Available
7.1.10 Specific Gravity
7.1.11 Transparency
7.1.12 Density
2.7-4 g/cm3Not Available
0
1400
7.2 Thermal Properties
7.2.1 Specific Heat Capacity
7.2.2 Resistance
Heat Resistant, Impact Resistant, Pressure Resistant, Scratch Resistant, Wear Resistant
Heat Resistant, Impact Resistant, Pressure Resistant
8 Reserves
8.1 Deposits in Eastern Continents
8.1.1 Asia
Not Yet Found
China, India, Kazakhstan, Mongolia, Russia, Uzbekistan
8.1.2 Africa
Not Yet Found
Namibia, Nigeria, South Africa
8.1.3 Europe
Bulgaria, France, Germany, Greece, Hungary, Italy, Latvia, Lithuania, Malta, Poland, Portugal, Romania, Slovenia, Spain, Sweden, The Czech Republic
Austria, Denmark, Germany, Great Britain, Netherlands, Norway, Poland, Sweden, Switzerland, United Kingdom
8.1.4 Others
8.2 Deposits in Western Continents
8.2.1 North America
8.2.2 South America
8.3 Deposits in Oceania Continent
8.3.1 Australia
Central Australia, South Australia, Western Australia
New South Wales, New Zealand