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Anorthosite
Anorthosite

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Anorthosite vs Porphyry

1 Definition
1.1 Definition
Anorthosite is a granular igneous rock composed largely of labradorite or plagioclase
Porphyry is a reddish-brown to purple igneous rock containing large phenocrysts of various minerals embedded in a fine-grained matrix
1.2 History
1.2.1 Origin
Unknown
Egypt
1.2.2 Discoverer
Unknown
Unknown
1.3 Etymology
From French anorthose plagioclase + -ite1
From Old French porfire, from Italian porfiro and in some cases directly from Latin porphyrites
1.4 Class
Igneous Rocks
Igneous Rocks
1.4.1 Sub-Class
Durable Rock, Medium Hardness Rock
Durable Rock, Hard Rock
1.5 Family
1.5.1 Group
Plutonic
Plutonic
1.6 Other Categories
Coarse Grained Rock, Opaque Rock
Fine Grained Rock, Opaque Rock
2 Texture
2.1 Texture
Foliated, Glassy
Porphyritic
2.2 Color
Black, Bluish - Grey, Brown, Green, Grey, Light Greenish Grey, Pink, White
Black, Brown, Colourless, Green, Grey, Red, Rust, White
2.3 Maintenance
Less
Less
2.4 Durability
Durable
Durable
2.4.1 Water Resistant
81% Igneous Rocks Rocks have it !
81% Igneous Rocks Rocks have it !
2.4.2 Scratch Resistant
86% Igneous Rocks Rocks have it !
86% Igneous Rocks Rocks have it !
2.4.3 Stain Resistant
66% Igneous Rocks Rocks have it !
66% Igneous Rocks Rocks have it !
2.4.4 Wind Resistant
49% Igneous Rocks Rocks have it !
49% Igneous Rocks Rocks have it !
2.4.5 Acid Resistant
48% Igneous Rocks Rocks have it !
48% Igneous Rocks Rocks have it !
2.5 Appearance
Layered, Banded, Veined and Shiny
Dull
3 Uses
3.1 Architecture
3.1.1 Interior Uses
Decorative Aggregates, Floor Tiles, Homes, Interior Decoration
Decorative Aggregates, Interior Decoration
3.1.2 Exterior Uses
As Building Stone, As Facing Stone, Garden Decoration
Garden Decoration, Paving Stone
3.1.3 Other Architectural Uses
Curbing
Curbing
3.2 Industry
3.2.1 Construction Industry
As Dimension Stone, Cement Manufacture, for Road Aggregate
Construction Aggregate
3.2.2 Medical Industry
Not Yet Used
Not Yet Used
3.3 Antiquity Uses
Artifacts, Sculpture, Small Figurines
Artifacts, Monuments, Sculpture
3.4 Other Uses
3.4.1 Commercial Uses
Creating Artwork, Curling
Creating Artwork, Gemstone, Jewelry
4 Types
4.1 Types
Proterozoic Anorthosite and Archean Anorthosite
Rhomb Porphyry
4.2 Features
Generally rough to touch, Is one of the oldest rock
Generally rough to touch, Is one of the oldest rock, Surfaces are often shiny
4.3 Archaeological Significance
4.3.1 Monuments
Not Yet Used
Used
4.3.2 Famous Monuments
Not Applicable
Data Not Available
4.3.3 Sculpture
Used
Used
4.3.4 Famous Sculptures
Not Applicable
Data Not Available
4.3.5 Pictographs
Not Used
Not Used
4.3.6 Petroglyphs
Not Used
Not Used
4.3.7 Figurines
Used
Used
4.4 Fossils
Absent
Absent
5 Formation
5.1 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.
Porphyry is formed in two stages: the magma cools slowly deep within the crust or the magma is cools rapidly as it erupts from a volcano, creating small grains that are usually invisible to naked eye.
5.2 Composition
5.2.1 Mineral Content
Amphibole, Clinopyroxene, Ilmenite, Magnetite, Olivine, Orthopyroxene
Biotite, Chert, Feldspar, Garnet, Graphite, Quartz, Silica
5.2.2 Compound Content
Ca, CaO, Chromium(III) Oxide, MgO, Sulfur Trioxide
Aluminium Oxide, CaO, Iron(III) Oxide, Potassium Oxide, MgO, Sodium Oxide, Silicon Dioxide, Titanium Dioxide
5.3 Transformation
5.3.1 Metamorphism
97% Igneous Rocks Rocks have it !
97% Igneous Rocks Rocks have it !
5.3.2 Types of Metamorphism
Cataclastic Metamorphism, Contact Metamorphism
Burial Metamorphism, Cataclastic Metamorphism, Contact Metamorphism, Hydrothermal Metamorphism, Impact Metamorphism, Regional Metamorphism
5.3.3 Weathering
99% Igneous Rocks Rocks have it !
99% Igneous Rocks Rocks have it !
5.3.4 Types of Weathering
Biological Weathering
Biological Weathering, Chemical Weathering, Not Registered
5.3.5 Erosion
92% Igneous Rocks Rocks have it !
92% Igneous Rocks Rocks have it !
5.3.6 Types of Erosion
Chemical Erosion, Wind Erosion
Chemical Erosion, Coastal Erosion, Glacier Erosion
6 Properties
6.1 Physical Properties
6.1.1 Hardness
5-6
6-7
6.1.2 Grain Size
Coarse Grained
Fine Grained
6.1.3 Fracture
Irregular
Irregular
6.1.4 Streak
White
White
6.1.5 Porosity
Less Porous
Less Porous
6.1.6 Luster
Pearly to Subvitreous
Dull
6.1.7 Compressive Strength
Flint
Not Available
Rank: N/A (Overall)
Not Available
Rank: N/A (Overall)
Obsidian
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6.1.8 Cleavage
Irregular
Imperfect
6.1.9 Toughness
Not Available
1.7
6.1.10 Specific Gravity
2.62-2.82
2.5-4
6.1.11 Transparency
Translucent
Translucent to Opaque
6.1.12 Density
2.7-4 g/cm3
2.5-2.52 g/cm3
6.2 Thermal Properties
6.2.1 Specific Heat Capacity
Banded iron for..
0.84 kJ/Kg K
Rank: 15 (Overall)
Not Available
Rank: N/A (Overall)
Granulite
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6.2.2 Resistance
Heat Resistant, Impact Resistant, Pressure Resistant, Scratch Resistant, Wear Resistant
Heat Resistant, Impact Resistant
7 Reserves
7.1 Deposits in Eastern Continents
7.1.1 Asia
Not Yet Found
China, Kazakhstan, South Korea, Thailand, Turkey, Vietnam
7.1.2 Africa
Not Yet Found
Egypt, Ethiopia, Ghana, South Africa
7.1.3 Europe
Bulgaria, France, Germany, Greece, Hungary, Italy, Latvia, Lithuania, Malta, Poland, Portugal, Romania, Slovenia, Spain, Sweden, The Czech Republic
Finland, France, Germany, Great Britain, Hungary, Iceland, Ireland, Italy, Netherlands, Norway, Romania, Sweden, Switzerland
7.1.4 Others
Not Yet Found
Greenland
7.2 Deposits in Western Continents
7.2.1 North America
Canada
Canada, Cuba, Jamaica, USA
7.2.2 South America
Bolivia, Colombia
Bolivia, Brazil, Colombia, Ecuador, Paraguay
7.3 Deposits in Oceania Continent
7.3.1 Australia
Central Australia, South Australia, Western Australia
New South Wales, New Zealand, Western Australia

Anorthosite vs Porphyry Information

Earth’s outer layer is covered by rocks and these rocks have different physical and chemical properties. As two rocks are not same, it’s fun to compare them. You can also know more about Anorthosite and Porphyry Reserves. Anorthosite is a granular igneous rock composed largely of labradorite or plagioclase. Porphyry is a reddish-brown to purple igneous rock containing large phenocrysts of various minerals embedded in a fine-grained matrix. These rocks are composed of many distinct minerals. The process of formation of rocks is different for various rocks. Rocks are quarried from many years for various purposes. You can check out Anorthosite vs Porphyry information and Anorthosite vs Porphyry characteristics in the upcoming sections.

Anorthosite vs Porphyry Characteristics

Though some rocks look identical, they have certain characteristics which distinguish them from others. Characteristics of rocks include texture, appearance, color, fracture, streak, hardness etc. Anorthosite vs Porphyry characteristics assist us to distinguish and recognize rocks. Also you can check about Properties of Anorthosite and Properties of Porphyry. Learn more about Anorthosite vs Porphyry in the next section. The interior uses of Anorthosite include Decorative aggregates, Floor tiles, Homes and Interior decoration whereas the interior uses of Porphyry include Decorative aggregates and Interior decoration. Due to some exceptional properties of Anorthosite and Porphyry, they have various applications in construction industry. The uses of Anorthosite in construction industry include As dimension stone, Cement manufacture, For road aggregate and that of Porphyry include Construction aggregate.

More about Anorthosite and Porphyry

Here you can know more about Anorthosite and Porphyry. The life cycle of a rock consists of formation of rock, composition of rock and transformation of rock. The composition of Anorthosite and Porphyry consists of mineral content and compound content. The mineral content of Anorthosite includes Amphibole, Clinopyroxene, Ilmenite, Magnetite, Olivine, Orthopyroxene and mineral content of Porphyry includes Biotite, Chert, Feldspar, Garnet, Graphite, Quartz, Silica. You can also check out the list of all Igneous Rocks. When we have to compare Anorthosite vs Porphyry, the texture, color and appearance plays an important role in determining the type of rock. Anorthosite is available in black, bluish - grey, brown, green, grey, light greenish grey, pink, white colors whereas, Porphyry is available in black, brown, colourless, green, grey, red, rust, white colors. Appearance of Anorthosite is Layered, Banded, Veined and Shiny and that of Porphyry is Dull. Properties of rock is another aspect for Anorthosite vs Porphyry. The hardness of Anorthosite is 5-6 and that of Porphyry is 6-7. The types of Anorthosite are Proterozoic Anorthosite and Archean Anorthosite whereas types of Porphyry are Rhomb Porphyry. Streak of rock is the color of powder produced when it is dragged across an unweathered surface. The streak of Anorthosite and Porphyry is white. The specific heat capacity of Anorthosite is 0.84 kJ/Kg K and that of Porphyry is Not Available. Depending on the properties like hardness, toughness, specific heat capacity, porosity etc., rocks are resistant to heat, wear, impact, etc.Anorthosite is heat resistant, impact resistant, pressure resistant, scratch resistant, wear resistant whereas Porphyry is heat resistant, impact resistant.