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Scoria vs Pseudotachylite


Pseudotachylite vs Scoria


Definition

Definition
Scoria is a dark-colored extrusive igneous rock with abundant round bubble-like cavities  
Very fine grained fault rock which is composed of glassy matrix that often contains inclusions of wall-rock fragments.  

History
  
  

Origin
-  
USA  

Discoverer
Unknown  
Unknown  

Etymology
From late Middle English (denoting slag from molten metal), from Greek skōria refuse, from skōr dung  
From pseudo- +‎ tachylite, a glassy rock generated by frictional heat within faults.  

Class
Igneous Rocks  
Metamorphic Rocks  

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

Family
  
  

Group
Volcanic  
-  

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

Texture

Texture
Vesicular  
Quench  

Color
Black, Brown, Dark Grey to Black, Red  
Black, Brown, Green, Grey, Pink, White  

Maintenance
More  
Less  

Durability
Durable  
Durable  

Water Resistant
Yes  
Yes  

Scratch Resistant
Yes  
Yes  

Stain Resistant
No  
No  

Wind Resistant
No  
Yes  

Acid Resistant
No  
Yes  

Appearance
Glassy and Vesicular  
Dull and Soft  

Uses

Architecture
  
  

Interior Uses
Decorative Aggregates, Interior Decoration  
Decorative Aggregates, Entryways, Interior Decoration  

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

Other Architectural Uses
Curbing  
Curbing  

Industry
  
  

Construction Industry
Cement Manufacture, Construction Aggregate, for Road Aggregate, In landscaping and drainage works  
As Dimension Stone, Cement Manufacture, for Road Aggregate, Making natural cement  

Medical Industry
-  
-  

Antiquity Uses
Artifacts, Monuments, Sculpture  
Artifacts, Monuments  

Other Uses
  
  

Commercial Uses
As a traction material on snow-covered roads, Creating Artwork, High-temperature insulation, In gas barbecue grills  
Creating Artwork, Gemstone  

Types

Types
Basaltic Scoria and Andesitic Scoria  
Cataclastic rock  

Features
Available in Lots of Colors and Patterns, Generally rough to touch, Surfaces are often shiny  
Host Rock for Lead  

Archaeological Significance
  
  

Monuments
-  
-  

Famous Monuments
-  
-  

Sculpture
-  
-  

Famous Sculptures
-  
-  

Pictographs
-  
-  

Petroglyphs
-  
-  

Figurines
-  
-  

Fossils
Absent  
Absent  

Formation

Formation
Scoria forms when magma containing huge amount of dissolved gas flows from a volcano during an eruption.  
Due to change in environmental conditions, rocks are heated and pressurized deep inside the Earth's surface. Pseudotachylite is formed from the extreme heat caused by magma or by the intense collisions and friction of tectonic plates.  

Composition
  
  

Mineral Content
Apatite, Biotite, Calcite, Feldspar, Hematite, Hornblade, Ilmenite, Magnetite, Olivine, Pyroxene, Quartz, Silica  
Iron Oxides, Pyroxene, Quartz, Stishovite, Sulfides  

Compound Content
Ca, NaCl  
Carbon Dioxide, Silicon Dioxide, Sulfur Dioxide, Sulphur  

Transformation
  
  

Metamorphism
Yes  
Yes  

Types of Metamorphism
Burial Metamorphism, Cataclastic Metamorphism, Contact Metamorphism  
Burial Metamorphism, Cataclastic Metamorphism, Contact Metamorphism  

Weathering
Yes  
No  

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

Erosion
Yes  
No  

Types of Erosion
Chemical Erosion, Coastal Erosion, Glacier Erosion  
-  

Properties

Physical Properties
  
  

Hardness
5-6  
7  

Grain Size
Fine Grained  
Very fine-grained  

Fracture
Conchoidal  
Uneven  

Streak
White  
Light to dark brown  

Porosity
Highly Porous  
Less Porous  

Luster
Subvitreous to Dull  
Vitreous  

Compressive Strength
70.00 N/mm2  
35
60.00 N/mm2  
37

Cleavage
Perfect  
-  

Toughness
2.1  
-  

Specific Gravity
-9999  
2.46-2.86  

Transparency
Opaque  
Transparent to Translucent  

Density
-9999 g/cm3  
2.7-2.9 g/cm3  

Thermal Properties
  
  

Specific Heat Capacity
0.84 kJ/Kg K  
15
0.92 kJ/Kg K  
10

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

Reserves

Deposits in Eastern Continents
  
  

Asia
Afghanistan, Indonesia, Japan, Russia  
South Korea  

Africa
Ethiopia, Kenya, Tanzania  
Western Africa  

Europe
Greece, Hungary, Iceland, Italy, Turkey  
Great Britain, Switzerland  

Others
-  
-  

Deposits in Western Continents
  
  

North America
Bahamas, Barbados, Canada, Costa Rica, Cuba, Jamaica, Mexico, USA  
-  

South America
Argentina, Chile, Ecuador, Peru  
-  

Deposits in Oceania Continent
  
  

Australia
New Zealand, Western Australia  
Central Australia, Western Australia  

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Scoria vs Pseudotachylite 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 Scoria and Pseudotachylite Reserves. Scoria is a dark-colored extrusive igneous rock with abundant round bubble-like cavities. Very fine grained fault rock which is composed of glassy matrix that often contains inclusions of wall-rock fragments.. 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 Scoria vs Pseudotachylite information and Scoria vs Pseudotachylite characteristics in the upcoming sections.

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Scoria vs Pseudotachylite 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. Scoria vs Pseudotachylite characteristics assist us to distinguish and recognize rocks. Also you can check about Properties of Scoria and Properties of Pseudotachylite. Learn more about Scoria vs Pseudotachylite in the next section. The interior uses of Scoria include Decorative aggregates and Interior decoration whereas the interior uses of Pseudotachylite include Decorative aggregates, Entryways and Interior decoration. Due to some exceptional properties of Scoria and Pseudotachylite, they have various applications in construction industry. The uses of Scoria in construction industry include Cement manufacture, Construction aggregate, For road aggregate, In landscaping and drainage works and that of Pseudotachylite include As dimension stone, Cement manufacture, For road aggregate, Making natural cement.

More about Scoria and Pseudotachylite

Here you can know more about Scoria and Pseudotachylite. The life cycle of a rock consists of formation of rock, composition of rock and transformation of rock. The composition of Scoria and Pseudotachylite consists of mineral content and compound content. The mineral content of Scoria includes Apatite, Biotite, Calcite, Feldspar, Hematite, Hornblade, Ilmenite, Magnetite, Olivine, Pyroxene, Quartz, Silica and mineral content of Pseudotachylite includes Iron Oxides, Pyroxene, Quartz, Stishovite, Sulfides. You can also check out the list of all Igneous Rocks. When we have to compare Scoria vs Pseudotachylite, the texture, color and appearance plays an important role in determining the type of rock. Scoria is available in black, brown, dark grey to black, red colors whereas, Pseudotachylite is available in black, brown, green, grey, pink, white colors. Appearance of Scoria is Glassy and Vesicular and that of Pseudotachylite is Dull and Soft. Properties of rock is another aspect for Scoria vs Pseudotachylite. The hardness of Scoria is 5-6 and that of Pseudotachylite is 7. The types of Scoria are Basaltic Scoria and Andesitic Scoria whereas types of Pseudotachylite are Cataclastic rock. Streak of rock is the color of powder produced when it is dragged across an unweathered surface. The streak of Scoria is white while that of Pseudotachylite is light to dark brown. The specific heat capacity of Scoria is 0.84 kJ/Kg K and that of Pseudotachylite is 0.92 kJ/Kg K. Depending on the properties like hardness, toughness, specific heat capacity, porosity etc., rocks are resistant to heat, wear, impact, etc.Scoria is heat resistant, impact resistant, pressure resistant, wear resistant whereas Pseudotachylite is heat resistant.

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