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Mylonite vs Hornfels


Hornfels vs Mylonite


Definition

Definition
Mylonite is a metamorphic rock formed by ductile deformation during intense shearing encountered during folding and faulting, a process termed cataclastic or dynamic metamorphism   
Hornfels is a metamorphic rock formed by the contact between mudstone or other clay rich rock, and a hot igneous body, and represents a heat altered equivalent of the original rock   

History
  
  

Origin
New Zealand   
New Zealand   

Discoverer
Unknown   
Unknown   

Etymology
From Greek mulōn mill + -ite   
From German which means hornstone   

Class
Metamorphic Rocks   
Metamorphic Rocks   

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

Family
  
  

Group
Not Applicable   
Not Applicable   

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

Texture

Texture
Foliated   
Granular, Platy   

Color
Black to Grey   
Brown, Dark Greenish - Grey, Green, Reddish Brown   

Maintenance
Less   
Less   

Durability
Durable   
Durable   

Water Resistant
Yes   
Yes   

Scratch Resistant
Yes   
No   

Stain Resistant
No   
No   

Wind Resistant
No   
No   

Acid Resistant
No   
No   

Appearance
Dull, Banded and Foilated   
Dull   

Uses

Architecture
  
  

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

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

Other Architectural Uses
Curbing   
Curbing   

Industry
  
  

Construction Industry
for Road Aggregate, Landscaping, Roadstone   
for Road Aggregate, Roadstone   

Medical Industry
Not Yet Used   
Not Yet Used   

Antiquity Uses
Artifacts, Monuments   
Artifacts, Monuments   

Other Uses
  
  

Commercial Uses
Creating Artwork, Gemstone, Jewelry   
Cemetery Markers, Commemorative Tablets, Creating Artwork   

Types

Types
Blastomylonites, Ultramylonites and Phyllonites   
Biotite hornfels   

Features
Surfaces are often shiny   
Smooth to touch   

Archaeological Significance
  
  

Monuments
Used   
Used   

Famous Monuments
Data Not Available   
Data Not Available   

Sculpture
Used   
Not Yet Used   

Famous Sculptures
Data Not Available   
Not Applicable   

Pictographs
Used   
Used   

Petroglyphs
Used   
Used   

Figurines
Used   
Not Yet Used   

Fossils
Absent   
Absent   

Formation

Formation
Mylonites are ductilely deformed rocks formed by the accumulation of large shear strain, in ductile fault zones.   
Due to change in environmental conditions, rocks are heated and pressurized deep inside the Earth's surface. Hornfels is formed from the extreme heat caused by magma or by the intense collisions and friction of tectonic plates.   

Composition
  
  

Mineral Content
Porphyroblasts   
Andalusite   

Compound Content
Aluminium Oxide, Calcium Sulfate, Chromium(III) Oxide, Iron(III) Oxide, Magnesium Carbonate, Silicon Dioxide   
Fe, Mg   

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   

Erosion
Yes   
Yes   

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

Properties

Physical Properties
  
  

Hardness
3-4   
2-3   

Grain Size
Fine Grained   
Fine Grained   

Fracture
Conchoidal   
Conchoidal   

Streak
White   
Unknown   

Porosity
Highly Porous   
Highly Porous   

Luster
Shiny   
Shiny   

Compressive Strength
1.28 N/mm2   
32
5.80 N/mm2   
31

Cleavage
Conchoidal   
Perfect   

Toughness
Not Available   
Not Yet Found   

Specific Gravity
2.97-3.05   
3.4-3.9   

Transparency
Opaque   
Opaque   

Density
2.6-4.8 g/cm3   
0.25-0.30 g/cm3   

Thermal Properties
  
  

Specific Heat Capacity
1.50 kJ/Kg K   
3
0.84 kJ/Kg K   
15

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

Reserves

Deposits in Eastern Continents
  
  

Asia
China, India, Indonesia, Saudi Arabia, South Korea   
Bangladesh, Bhutan, China, India, North Korea, Qatar, Russia, Saudi Arabia, South Korea, Thailand   

Africa
Eritrea, Ethiopia, Ghana, South Africa, Western Africa   
Cameroon, East Africa, Tanzania, Western Africa   

Europe
England, Finland, France, Germany, Great Britain, Greece, United Kingdom   
United Kingdom   

Others
Not Yet Found   
Not Yet Found   

Deposits in Western Continents
  
  

North America
USA   
Canada, USA   

South America
Not Yet Found   
Bolivia, Brazil, Colombia, Ecuador   

Deposits in Oceania Continent
  
  

Australia
Central Australia, Western Australia   
New South Wales, New Zealand, Queensland, Western Australia   

Definition >>
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Mylonite vs Hornfels 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 Mylonite and Hornfels Reserves. Mylonite is a metamorphic rock formed by ductile deformation during intense shearing encountered during folding and faulting, a process termed cataclastic or dynamic metamorphism. Hornfels is a metamorphic rock formed by the contact between mudstone or other clay rich rock, and a hot igneous body, and represents a heat altered equivalent of the original rock. 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 Mylonite vs Hornfels information and Mylonite vs Hornfels characteristics in the upcoming sections.

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Mylonite vs Hornfels 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. Mylonite vs Hornfels characteristics assist us to distinguish and recognize rocks. Also you can check about Properties of Mylonite and Properties of Hornfels. Learn more about Mylonite vs Hornfels in the next section. The interior uses of Mylonite include Decorative aggregates and Interior decoration whereas the interior uses of Hornfels include Decorative aggregates, Flooring, Homes and Interior decoration. Due to some exceptional properties of Mylonite and Hornfels, they have various applications in construction industry. The uses of Mylonite in construction industry include For road aggregate, Landscaping, Roadstone and that of Hornfels include For road aggregate, Roadstone.

More about Mylonite and Hornfels

Here you can know more about Mylonite and Hornfels. The life cycle of a rock consists of formation of rock, composition of rock and transformation of rock. The composition of Mylonite and Hornfels consists of mineral content and compound content. The mineral content of Mylonite includes Porphyroblasts and mineral content of Hornfels includes Andalusite. You can also check out the list of all Metamorphic Rocks. When we have to compare Mylonite vs Hornfels, the texture, color and appearance plays an important role in determining the type of rock. Mylonite is available in black to grey colors whereas, Hornfels is available in brown, dark greenish - grey, green, reddish brown colors. Appearance of Mylonite is Dull, Banded and Foilated and that of Hornfels is Dull. Properties of rock is another aspect for Mylonite vs Hornfels. The hardness of Mylonite is 3-4 and that of Hornfels is 2-3. The types of Mylonite are Blastomylonites, Ultramylonites and Phyllonites whereas types of Hornfels are Biotite hornfels. Streak of rock is the color of powder produced when it is dragged across an unweathered surface. The streak of Mylonite is white while that of Hornfels is unknown. The specific heat capacity of Mylonite is 1.50 kJ/Kg K and that of Hornfels 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.Mylonite is heat resistant, impact resistant, pressure resistant whereas Hornfels is heat resistant, impact resistant, pressure resistant.

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