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Pseudotachylite vs Trondhjemite


Trondhjemite vs Pseudotachylite


Definition

Definition
Very fine grained fault rock which is composed of glassy matrix that often contains inclusions of wall-rock fragments.  
Trondhjemite is a leucocratic (light-colored) intrusive igneous rock. It is a variety of tonalite in which the plagioclase is mostly in the form of oligoclase. Trondhjemites are sometimes known as plagiogranites.  

History
  
  

Origin
USA  
Tonale, Italy  

Discoverer
Unknown  
Unknown  

Etymology
From pseudo- +‎ tachylite, a glassy rock generated by frictional heat within faults.  
From Trondheim, Norway  

Class
Metamorphic Rocks  
Igneous Rocks  

Sub-Class
Durable Rock, Hard Rock  
Durable Rock, Hard Rock  

Family
  
  

Group
-  
Plutonic  

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

Texture

Texture
Quench  
Phaneritic  

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

Maintenance
Less  
Less  

Durability
Durable  
Durable  

Water Resistant
Yes  
Yes  

Scratch Resistant
Yes  
Yes  

Stain Resistant
No  
Yes  

Wind Resistant
Yes  
No  

Acid Resistant
Yes  
No  

Appearance
Dull and Soft  
Banded and Foilated  

Uses

Architecture
  
  

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

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

Other Architectural Uses
Curbing  
Curbing  

Industry
  
  

Construction Industry
As Dimension Stone, Cement Manufacture, for Road Aggregate, Making natural cement  
As Dimension Stone, Cement Manufacture, Cobblestones, Construction Aggregate, for Road Aggregate  

Medical Industry
-  
-  

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

Other Uses
  
  

Commercial Uses
Creating Artwork, Gemstone  
Cemetery Markers, Creating Artwork  

Types

Types
Cataclastic rock  
Intermediate intrusive rock  

Features
Host Rock for Lead  
Is one of the oldest rock, Typically speckled black and white.  

Archaeological Significance
  
  

Monuments
-  
-  

Famous Monuments
-  
-  

Sculpture
-  
-  

Famous Sculptures
-  
-  

Pictographs
-  
-  

Petroglyphs
-  
-  

Figurines
-  
-  

Fossils
Absent  
Absent  

Formation

Formation
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.  
When alkali feldspar is extracted from granite, it changes to granitoid and later, it becomes trondhjemite with quartz as major mineral.  

Composition
  
  

Mineral Content
Iron Oxides, Pyroxene, Quartz, Stishovite, Sulfides  
Albite, Amphibole, Apatite, Biotite, Feldspar, Hornblade, Ilmenite, Magnetite, Manganese Oxides, Olivine, Plagioclase, Pyroxene, Quartz, Sulfides, Titanite, Zircon  

Compound Content
Carbon Dioxide, Silicon Dioxide, Sulfur Dioxide, Sulphur  
NaCl, CaO, MgO, Silicon Dioxide  

Transformation
  
  

Metamorphism
Yes  
Yes  

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

Weathering
No  
Yes  

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

Erosion
No  
Yes  

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

Properties

Physical Properties
  
  

Hardness
7  
6-7  

Grain Size
Very fine-grained  
Medium to Fine Coarse Grained  

Fracture
Uneven  
Conchoidal  

Streak
Light to dark brown  
Bluish Black  

Porosity
Less Porous  
Very Less Porous  

Luster
Vitreous  
Subvitreous to Dull  

Compressive Strength
60.00 N/mm2  
37
130.00 N/mm2  
24

Cleavage
-  
-  

Toughness
-  
2.1  

Specific Gravity
2.46-2.86  
2.86-3  

Transparency
Transparent to Translucent  
Opaque  

Density
2.7-2.9 g/cm3  
2.73 g/cm3  

Thermal Properties
  
  

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

Resistance
Heat Resistant  
Heat Resistant, Pressure Resistant, Wear Resistant  

Reserves

Deposits in Eastern Continents
  
  

Asia
South Korea  
-  

Africa
Western Africa  
Egypt  

Europe
Great Britain, Switzerland  
Finland, Germany, Italy, Romania, Sweden, Turkey  

Others
-  
-  

Deposits in Western Continents
  
  

North America
-  
USA  

South America
-  
Argentina, Bolivia, Chile, Colombia, Ecuador, Peru  

Deposits in Oceania Continent
  
  

Australia
Central Australia, Western Australia  
New Zealand, South Australia, Western Australia  

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Pseudotachylite vs Trondhjemite 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 Pseudotachylite and Trondhjemite Reserves. Very fine grained fault rock which is composed of glassy matrix that often contains inclusions of wall-rock fragments.. Trondhjemite is a leucocratic (light-colored) intrusive igneous rock. It is a variety of tonalite in which the plagioclase is mostly in the form of oligoclase. Trondhjemites are sometimes known as plagiogranites.. 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 Pseudotachylite vs Trondhjemite information and Pseudotachylite vs Trondhjemite characteristics in the upcoming sections.

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

More about Pseudotachylite and Trondhjemite

Here you can know more about Pseudotachylite and Trondhjemite. The life cycle of a rock consists of formation of rock, composition of rock and transformation of rock. The composition of Pseudotachylite and Trondhjemite consists of mineral content and compound content. The mineral content of Pseudotachylite includes Iron Oxides, Pyroxene, Quartz, Stishovite, Sulfides and mineral content of Trondhjemite includes Albite, Amphibole, Apatite, Biotite, Feldspar, Hornblade, Ilmenite, Magnetite, Manganese Oxides, Olivine, Plagioclase, Pyroxene, Quartz, Sulfides, Titanite, Zircon. You can also check out the list of all Metamorphic Rocks. When we have to compare Pseudotachylite vs Trondhjemite, the texture, color and appearance plays an important role in determining the type of rock. Pseudotachylite is available in black, brown, green, grey, pink, white colors whereas, Trondhjemite is available in black, brown, light to dark grey, white colors. Appearance of Pseudotachylite is Dull and Soft and that of Trondhjemite is Banded and Foilated. Properties of rock is another aspect for Pseudotachylite vs Trondhjemite. The hardness of Pseudotachylite is 7 and that of Trondhjemite is 6-7. The types of Pseudotachylite are Cataclastic rock whereas types of Trondhjemite are Intermediate intrusive rock. Streak of rock is the color of powder produced when it is dragged across an unweathered surface. The streak of Pseudotachylite is light to dark brown while that of Trondhjemite is bluish black. The specific heat capacity of Pseudotachylite is 0.92 kJ/Kg K and that of Trondhjemite 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.Pseudotachylite is heat resistant whereas Trondhjemite is heat resistant, pressure resistant, wear resistant.

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