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Schist vs Arkose


Arkose vs Schist


Definition

Definition
Schist is a medium grade metamorphic rock with medium to large, flat, sheet like grains in a preferred orientation   
Arkose is a sedimentary rock, specifically a type of sandstone containing at least 25% feldspar   

History
  
  

Origin
Unknown   
France   

Discoverer
Unknown   
Alexandre Brongniart   

Etymology
From French schiste, Greek skhistos i.e. split   
From Auvergne region of France used by a French geologist Alexandre Brongniart in 1826 who applied this term to some feldspathic sandstones   

Class
Metamorphic Rocks   
Sedimentary Rocks   

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

Family
  
  

Group
Not Applicable   
Not Applicable   

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

Texture

Texture
Foliated, Platy   
Clastic   

Color
Black, Blue, Brown, Dark Brown, Green, Grey, Silver   
Reddish Brown   

Maintenance
Less   
Less   

Durability
Durable   
Durable   

Water Resistant
Yes   
Yes   

Scratch Resistant
No   
Yes   

Stain Resistant
No   
Yes   

Wind Resistant
No   
No   

Acid Resistant
No   
Yes   

Appearance
Layered and Shiny   
Rough and Dull   

Uses

Architecture
  
  

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

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

Other Architectural Uses
Not Yet Used   
Whetstones   

Industry
  
  

Construction Industry
As Dimension Stone, Building houses or walls, Cement Manufacture, for Road Aggregate, Roadstone   
Cement Manufacture, Construction Aggregate, for Road Aggregate, Production of Glass and Ceramics, Raw material for the manufacture of mortar   

Medical Industry
Not Yet Used   
Not Yet Used   

Antiquity Uses
Artifacts   
Artifacts, Sculpture, Small Figurines   

Other Uses
  
  

Commercial Uses
Used in aquariums, Writing Slates   
In aquifers, Soil Conditioner, Source of Magnesia (MgO), Tombstones   

Types

Types
Mica Schists, Calc-Silicate Schists, Graphite Schists, Blueschists, Whiteschists, Greenschists, Hornblende Schist, Talc Schist, Chlorite Schist, Garnet Schist, Glaucophane schist.   
Not Available   

Features
Easily splits into thin plates, Smooth to touch   
Available in Lots of Colors and Patterns, Generally rough to touch, Is one of the oldest rock   

Archaeological Significance
  
  

Monuments
Not Yet Used   
Not Yet Used   

Famous Monuments
Not Applicable   
Not Applicable   

Sculpture
Not Yet Used   
Used   

Famous Sculptures
Not Applicable   
Data Not Available   

Pictographs
Used   
Not Used   

Petroglyphs
Used   
Not Used   

Figurines
Not Yet Used   
Used   

Fossils
Absent   
Present   

Formation

Formation
Schist formed by dynamic metamorphism at high temperatures and pressures that aligns the grains of mica, hornblende and other elongated minerals into thin layers.   
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.   

Composition
  
  

Mineral Content
Alusite, Amphibole, Biotite, Chlorite, Epidote, Feldspar, Garnet, Graphite, Hornblade, Kyanite, Micas, Muscovite or Illite, Porphyroblasts, Quartz, Sillimanite, Staurolite, Talc   
Calcite, Clay, Clay Minerals, Feldspar, Micas, Quartz   

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

Transformation
  
  

Metamorphism
No   
No   

Types of Metamorphism
Not Applicable   
Not Applicable   

Weathering
Yes   
Yes   

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

Erosion
Yes   
Yes   

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

Properties

Physical Properties
  
  

Hardness
3.5-4   
6-7   

Grain Size
Medium to Fine Coarse Grained   
Coarse Grained   

Fracture
Conchoidal   
Conchoidal   

Streak
White   
White   

Porosity
Highly Porous   
Highly Porous   

Luster
Shiny   
Dull   

Cleavage
Slaty   
Not Available   

Toughness
1.5   
Not Available   

Specific Gravity
2.5-2.9   
0   

Transparency
Opaque   
Opaque   

Density
2.8-2.9 g/cm3   
Not Available   

Thermal Properties
  
  

Resistance
Impact Resistant, Pressure Resistant, Water Resistant   
Heat Resistant, Impact Resistant, Pressure Resistant   

Reserves

Deposits in Eastern Continents
  
  

Asia
Afghanistan, Bangladesh, Bhutan, China, India, Japan, Kazakhstan, Malaysia, Pakistan, Russia, Thailand, Turkey, Vietnam   
China, India, Kazakhstan, Mongolia, Russia, Uzbekistan   

Africa
Egypt, Ethiopia, Morocco, Nigeria, South Africa   
Namibia, Nigeria, South Africa   

Europe
Austria, England, France, Georgia, Germany, Italy, Liechtenstein, Monaco, Norway, Slovenia, Spain, Sweden, Switzerland   
Austria, Denmark, Germany, Great Britain, Netherlands, Norway, Poland, Sweden, Switzerland, United Kingdom   

Others
Not Yet Found   
Greenland   

Deposits in Western Continents
  
  

North America
Canada, Costa Rica, Cuba, Mexico, Panama, USA   
Canada, USA   

South America
Brazil, Colombia, Guyana   
Brazil   

Deposits in Oceania Continent
  
  

Australia
New South Wales, New Zealand, Queensland   
New South Wales, New Zealand   

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Schist vs Arkose 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 Schist and Arkose Reserves. Schist is a medium grade metamorphic rock with medium to large, flat, sheet like grains in a preferred orientation. Arkose is a sedimentary rock, specifically a type of sandstone containing at least 25% feldspar. 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 Schist vs Arkose information and Schist vs Arkose characteristics in the upcoming sections.

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

More about Schist and Arkose

Here you can know more about Schist and Arkose. The life cycle of a rock consists of formation of rock, composition of rock and transformation of rock. The composition of Schist and Arkose consists of mineral content and compound content. The mineral content of Schist includes Alusite, Amphibole, Biotite, Chlorite, Epidote, Feldspar, Garnet, Graphite, Hornblade, Kyanite, Micas, Muscovite or Illite, Porphyroblasts, Quartz, Sillimanite, Staurolite, Talc and mineral content of Arkose includes Calcite, Clay, Clay Minerals, Feldspar, Micas, Quartz. You can also check out the list of all Metamorphic Rocks. When we have to compare Schist vs Arkose, the texture, color and appearance plays an important role in determining the type of rock. Schist is available in black, blue, brown, dark brown, green, grey, silver colors whereas, Arkose is available in reddish brown colors. Appearance of Schist is Layered and Shiny and that of Arkose is Rough and Dull. Properties of rock is another aspect for Schist vs Arkose. The hardness of Schist is 3.5-4 and that of Arkose is 6-7. The types of Schist are Mica Schists, Calc-Silicate Schists, Graphite Schists, Blueschists, Whiteschists, Greenschists, Hornblende Schist, Talc Schist, Chlorite Schist, Garnet Schist, Glaucophane schist. whereas types of Arkose are Not Available. Streak of rock is the color of powder produced when it is dragged across an unweathered surface. The streak of Schist and Arkose is white. The specific heat capacity of Schist is Not Available and that of Arkose is Not Available. Depending on the properties like hardness, toughness, specific heat capacity, porosity etc., rocks are resistant to heat, wear, impact, etc.Schist is impact resistant, pressure resistant, water resistant whereas Arkose is heat resistant, impact resistant, pressure resistant.

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