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Tuff vs Anorthosite


Anorthosite vs Tuff


Definition

Definition
Tuff is a type of rock made of volcanic ash ejected from a vent during a volcanic eruption  
Anorthosite is a granular igneous rock composed largely of labradorite or plagioclase  

History
  
  

Origin
Italy  
-  

Discoverer
Unknown  
Unknown  

Etymology
From a Latin word tophous then in Italian tufo and finally tuff  
From French anorthose plagioclase + -ite1  

Class
Igneous Rocks  
Igneous Rocks  

Sub-Class
Durable Rock, Medium Hardness Rock  
Durable Rock, Medium Hardness Rock  

Family
  
  

Group
Volcanic  
Plutonic  

Other Categories
Fine Grained Rock, Opaque Rock  
Coarse Grained Rock, Opaque Rock  

Texture

Texture
Clastic, Pyroclastic  
Foliated, Glassy  

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

Maintenance
More  
Less  

Durability
Durable  
Durable  

Water Resistant
Yes  
Yes  

Scratch Resistant
Yes  
No  

Stain Resistant
No  
No  

Wind Resistant
No  
Yes  

Acid Resistant
No  
No  

Appearance
Dull, Vesicular and Foilated  
Layered, Banded, Veined and Shiny  

Uses

Architecture
  
  

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

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

Other Architectural Uses
Curbing  
Curbing  

Industry
  
  

Construction Industry
Building houses or walls, Construction Aggregate  
As Dimension Stone, Cement Manufacture, for Road Aggregate  

Medical Industry
-  
-  

Antiquity Uses
Artifacts, Monuments, Sculpture, Small Figurines  
Artifacts, Sculpture, Small Figurines  

Other Uses
  
  

Commercial Uses
Creating Artwork  
Creating Artwork, Curling  

Types

Types
Welded tuff, Rhyolitic tuff, Basaltic tuff, Trachyte tuff, Andesitic tuff and Ignimbrite.  
Proterozoic Anorthosite and Archean Anorthosite  

Features
Always found as volcanic pipes over deep continental crust  
Generally rough to touch, Is one of the oldest rock  

Archaeological Significance
  
  

Monuments
-  
-  

Famous Monuments
Easter Island in the Polynesian Triangle, Pacific Ocean  
-  

Sculpture
-  
-  

Famous Sculptures
-  
-  

Pictographs
-  
-  

Petroglyphs
-  
-  

Figurines
-  
-  

Fossils
Absent  
Absent  

Formation

Formation
Tuff is formed when large masses of ash and sand which are mixed with hot gases are ejected by a volcano and avalanche rapidly down its slopes.  
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.   

Composition
  
  

Mineral Content
Calcite, Chlorite  
Amphibole, Clinopyroxene, Ilmenite, Magnetite, Olivine, Orthopyroxene  

Compound Content
Hydrogen Sulfide, Sulfur Dioxide  
Ca, CaO, Chromium(III) Oxide, MgO, Sulfur Trioxide  

Transformation
  
  

Metamorphism
Yes  
Yes  

Types of Metamorphism
Burial Metamorphism, Cataclastic Metamorphism, Contact Metamorphism, Hydrothermal Metamorphism, Impact Metamorphism, Regional Metamorphism  
Cataclastic Metamorphism, Contact Metamorphism  

Weathering
Yes  
Yes  

Types of Weathering
Biological Weathering, Chemical Weathering, Mechanical Weathering  
Biological Weathering  

Erosion
Yes  
Yes  

Types of Erosion
Chemical Erosion, Coastal Erosion, Glacier Erosion, Sea Erosion, Water Erosion, Wind Erosion  
Chemical Erosion, Wind Erosion  

Properties

Physical Properties
  
  

Hardness
4-6  
5-6  

Grain Size
Fine Grained  
Coarse Grained  

Fracture
Uneven  
Irregular  

Streak
White  
White  

Porosity
Highly Porous  
Less Porous  

Luster
Vitreous to Dull  
Pearly to Subvitreous  

Compressive Strength
243.80 N/mm2  
6
180.00 N/mm2  
18

Cleavage
-  
-  

Toughness
-  
-  

Specific Gravity
2.73  
2.62-2.82  

Transparency
Opaque  
Translucent  

Density
1-1.8 g/cm3  
2.7-4 g/cm3  

Thermal Properties
  
  

Specific Heat Capacity
0.20 kJ/Kg K  
32
0.84 kJ/Kg K  
15

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

Reserves

Deposits in Eastern Continents
  
  

Asia
Afghanistan, Armenia, Azerbaijan, Burma, Cambodia, China, India, Indonesia, Iran, Japan, Malaysia, Mongolia, Nepal, North Korea, Pakistan, Saudi Arabia, Syria, Taiwan, Thailand, Turkey, Vietnam, Yemen  
-  

Africa
Cameroon, Cape Verde, Eritrea, Ethiopia, Kenya, Libya, Madagascar, Nigeria, Rwanda, South Africa, Sudan, Uganda  
-  

Europe
France, Georgia, Germany, Greece, Iceland, Italy, Netherlands, Poland, Portugal, Spain, United Kingdom  
Bulgaria, France, Germany, Greece, Hungary, Italy, Latvia, Lithuania, Malta, Poland, Portugal, Romania, Slovenia, Spain, Sweden, The Czech Republic  

Others
Antarctica, Hawaii Islands  
-  

Deposits in Western Continents
  
  

North America
Canada, Costa Rica, Panama, USA  
Canada  

South America
Argentina, Bolivia, Brazil, Chile, Ecuador, Paraguay  
Bolivia, Colombia  

Deposits in Oceania Continent
  
  

Australia
Central Australia, Western Australia  
Central Australia, South Australia, Western Australia  

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Tuff vs Anorthosite 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 Tuff and Anorthosite Reserves. Tuff is a type of rock made of volcanic ash ejected from a vent during a volcanic eruption. Anorthosite is a granular igneous rock composed largely of labradorite or plagioclase. 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 Tuff vs Anorthosite information and Tuff vs Anorthosite characteristics in the upcoming sections.

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Tuff vs Anorthosite 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. Tuff vs Anorthosite characteristics assist us to distinguish and recognize rocks. Also you can check about Properties of Tuff and Properties of Anorthosite. Learn more about Tuff vs Anorthosite in the next section. The interior uses of Tuff include Decorative aggregates, Entryways, Flooring, Homes and Interior decoration whereas the interior uses of Anorthosite include Decorative aggregates, Floor tiles, Homes and Interior decoration. Due to some exceptional properties of Tuff and Anorthosite, they have various applications in construction industry. The uses of Tuff in construction industry include Building houses or walls, Construction aggregate and that of Anorthosite include As dimension stone, Cement manufacture, For road aggregate.

More about Tuff and Anorthosite

Here you can know more about Tuff and Anorthosite. The life cycle of a rock consists of formation of rock, composition of rock and transformation of rock. The composition of Tuff and Anorthosite consists of mineral content and compound content. The mineral content of Tuff includes Calcite, Chlorite and mineral content of Anorthosite includes Amphibole, Clinopyroxene, Ilmenite, Magnetite, Olivine, Orthopyroxene. You can also check out the list of all Igneous Rocks. When we have to compare Tuff vs Anorthosite, the texture, color and appearance plays an important role in determining the type of rock. Tuff is available in brown, grey, yellow colors whereas, Anorthosite is available in black, bluish - grey, brown, green, grey, light greenish grey, pink, white colors. Appearance of Tuff is Dull, Vesicular and Foilated and that of Anorthosite is Layered, Banded, Veined and Shiny. Properties of rock is another aspect for Tuff vs Anorthosite. The hardness of Tuff is 4-6 and that of Anorthosite is 5-6. The types of Tuff are Welded tuff, Rhyolitic tuff, Basaltic tuff, Trachyte tuff, Andesitic tuff and Ignimbrite. whereas types of Anorthosite are Proterozoic Anorthosite and Archean Anorthosite. Streak of rock is the color of powder produced when it is dragged across an unweathered surface. The streak of Tuff and Anorthosite is white. The specific heat capacity of Tuff is 0.20 kJ/Kg K and that of Anorthosite is 0.84 kJ/Kg K. Depending on the properties like hardness, toughness, specific heat capacity, porosity etc., rocks are resistant to heat, wear, impact, etc.Tuff is heat resistant, impact resistant, pressure resistant, wear resistant whereas Anorthosite is heat resistant, impact resistant, pressure resistant, scratch resistant, wear resistant.

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