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Blueschist vs Epidosite


Epidosite vs Blueschist


Definition

Definition
Blueschist is a metamorphic rock which is generally blue in color and is formed under conditions of high pressure and low temperature  
Epidosite is a highly altered epidote and quartz bearing rock which is a type of metasomatite, essentially altered basalt  

History
  
  

Origin
USA  
-  

Discoverer
Edgar Bailey  
Unknown  

Etymology
From French schiste, Greek skhistos i.e. split  
-  

Class
Metamorphic Rocks  
Igneous Rocks  

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

Family
  
  

Group
-  
Volcanic  

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

Texture

Texture
Foliated  
Glassy, Massive, Porphyritic, Scoriaceous, Vesicular  

Color
Blue, Bluish - Grey, Purple, Shades of Blue  
Black, Brown, Light to Dark Grey  

Maintenance
Less  
Less  

Durability
Durable  
Durable  

Water Resistant
No  
Yes  

Scratch Resistant
No  
Yes  

Stain Resistant
No  
Yes  

Wind Resistant
No  
Yes  

Acid Resistant
No  
No  

Appearance
Dull and Banded  
Dull and Soft  

Uses

Architecture
  
  

Interior Uses
Floor Tiles, Flooring, Homes, Hotels, Kitchens  
Decorative Aggregates, Floor Tiles, Homes, Hotels, Interior Decoration  

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

Other Architectural Uses
-  
Curbing  

Industry
  
  

Construction Industry
As Dimension Stone, Cobblestones, Rail Track Ballast, Roadstone  
As Dimension Stone, Cobblestones, Rail Track Ballast, Roadstone  

Medical Industry
-  
-  

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

Other Uses
  
  

Commercial Uses
Cemetery Markers, Commemorative Tablets, Creating Artwork, Curling, Tombstones  
Commemorative Tablets, Creating Artwork  

Types

Types
Metamorphic rock  
Alkaline Basalt, Boninite, High Alumina Basalt, Mid Ocean Ridge Basalt (MORB), Tholeiitic Basalt, Basaltic trachyandesite, Mugearite and Shoshonite  

Features
Has High structural resistance against erosion and climate, Very fine grained rock  
Has High structural resistance against erosion and climate, Very fine grained rock  

Archaeological Significance
  
  

Monuments
-  
-  

Famous Monuments
-  
-  

Sculpture
-  
-  

Famous Sculptures
-  
-  

Pictographs
-  
-  

Petroglyphs
-  
-  

Figurines
-  
-  

Fossils
Absent  
Absent  

Formation

Formation
Blueschist forms due to the metamorphism of basalt and other rocks with similar composition at high pressures and low temperatures and approximately corresponding to a depth of 15 to 30 kilometers and 200 to 500 °C.  
Epidosite is a fine-grained, hard rock which is a type of metasomatite, essentially altered basalt. It forms with or without crystallization, either below the surface as intrusive rocks or on the surface as extrusive rocks.  

Composition
  
  

Mineral Content
Albite, Chlorite, Epidote, Garnet, Glaucophane, Lawsonite, Muscovite or Illite, Quartz  
Olivine, Plagioclase, Pyroxene  

Compound Content
Aluminium Oxide, CaO, Iron(III) Oxide, FeO, Potassium Oxide, MgO, MnO, Sodium Oxide, Phosphorus Pentoxide, Silicon Dioxide, Titanium Dioxide  
Aluminium Oxide, CaO, Iron(III) Oxide, FeO, Potassium Oxide, MgO, MnO, Sodium Oxide, Phosphorus Pentoxide, Silicon Dioxide, Titanium Dioxide  

Transformation
  
  

Metamorphism
No  
Yes  

Types of Metamorphism
-  
Burial Metamorphism, Cataclastic Metamorphism, Hydrothermal Metamorphism, Impact Metamorphism  

Weathering
Yes  
Yes  

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

Erosion
Yes  
No  

Types of Erosion
Chemical Erosion, Coastal Erosion, Water Erosion, Wind Erosion  
-  

Properties

Physical Properties
  
  

Hardness
3.5-4  
6  

Grain Size
Fine to Medium Grained  
Fine to Coarse Grained  

Fracture
Conchoidal  
Conchoidal  

Streak
White to Grey  
White to Grey  

Porosity
Highly Porous  
Less Porous  

Luster
Dull  
-  

Compressive Strength
220.00 N/mm2  
9
160.00 N/mm2  
21

Cleavage
Slaty  
-  

Toughness
1.5  
2.3  

Specific Gravity
3-3.2  
2.8-3  

Transparency
Opaque  
Opaque  

Density
2.8-2.9 g/cm3  
-9999 g/cm3  

Thermal Properties
  
  

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

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

Reserves

Deposits in Eastern Continents
  
  

Asia
Japan, Turkey  
India, Russia  

Africa
Egypt, Ethiopia, South Africa  
South Africa  

Europe
France, Greece, Iceland  
Iceland  

Others
-  
-  

Deposits in Western Continents
  
  

North America
USA  
Canada, USA  

South America
-  
Brazil  

Deposits in Oceania Continent
  
  

Australia
New Zealand  
-  

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Blueschist vs Epidosite 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 Blueschist and Epidosite Reserves. Blueschist is a metamorphic rock which is generally blue in color and is formed under conditions of high pressure and low temperature. Epidosite is a highly altered epidote and quartz bearing rock which is a type of metasomatite, essentially altered basalt. 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 Blueschist vs Epidosite information and Blueschist vs Epidosite characteristics in the upcoming sections.

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Blueschist vs Epidosite 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. Blueschist vs Epidosite characteristics assist us to distinguish and recognize rocks. Also you can check about Properties of Blueschist and Properties of Epidosite. Learn more about Blueschist vs Epidosite in the next section. The interior uses of Blueschist include Floor tiles, Flooring, Homes, Hotels and Kitchens whereas the interior uses of Epidosite include Decorative aggregates, Floor tiles, Homes, Hotels and Interior decoration. Due to some exceptional properties of Blueschist and Epidosite, they have various applications in construction industry. The uses of Blueschist in construction industry include As dimension stone, Cobblestones, Rail track ballast, Roadstone and that of Epidosite include As dimension stone, Cobblestones, Rail track ballast, Roadstone.

More about Blueschist and Epidosite

Here you can know more about Blueschist and Epidosite. The life cycle of a rock consists of formation of rock, composition of rock and transformation of rock. The composition of Blueschist and Epidosite consists of mineral content and compound content. The mineral content of Blueschist includes Albite, Chlorite, Epidote, Garnet, Glaucophane, Lawsonite, Muscovite or Illite, Quartz and mineral content of Epidosite includes Olivine, Plagioclase, Pyroxene. You can also check out the list of all Igneous Rocks. When we have to compare Blueschist vs Epidosite, the texture, color and appearance plays an important role in determining the type of rock. Blueschist is available in blue, bluish - grey, purple, shades of blue colors whereas, Epidosite is available in black, brown, light to dark grey colors. Appearance of Blueschist is Dull and Banded and that of Epidosite is Dull and Soft. Properties of rock is another aspect for Blueschist vs Epidosite. The hardness of Blueschist is 3.5-4 and that of Epidosite is 6. The types of Blueschist are Metamorphic rock whereas types of Epidosite are Alkaline Basalt, Boninite, High Alumina Basalt, Mid Ocean Ridge Basalt (MORB), Tholeiitic Basalt, Basaltic trachyandesite, Mugearite and Shoshonite. Streak of rock is the color of powder produced when it is dragged across an unweathered surface. The streak of Blueschist and Epidosite is white to grey. The specific heat capacity of Blueschist is 0.84 kJ/Kg K and that of Epidosite 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.Blueschist is impact resistant, pressure resistant whereas Epidosite is heat resistant, pressure resistant, wear resistant.

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