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Hornfels vs Cataclasite


Cataclasite vs Hornfels


Definition

Definition
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  
Cataclasite is a type of cataclastic rock that is formed by fracturing and comminution during faulting. It is normally cohesive and non-foliated, consisting of angular clasts in a finer-grained matrix  

History
  
  

Origin
New Zealand  
Swiss Alps, Europe  

Discoverer
Unknown  
Michael Tellinger  

Etymology
From German which means hornstone  
From the Italian word cataclasi  

Class
Metamorphic Rocks  
Metamorphic Rocks  

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

Family
  
  

Group
-  
-  

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

Texture

Texture
Granular, Platy  
Clastic  

Color
Brown, Dark Greenish - Grey, Green, Reddish Brown  
Brown, Green, White, Yellow  

Maintenance
Less  
Less  

Durability
Durable  
Durable  

Water Resistant
Yes  
Yes  

Scratch Resistant
No  
No  

Stain Resistant
No  
No  

Wind Resistant
No  
No  

Acid Resistant
No  
No  

Appearance
Dull  
Dull and Banded  

Uses

Architecture
  
  

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

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

Other Architectural Uses
Curbing  
Curbing  

Industry
  
  

Construction Industry
for Road Aggregate, Roadstone  
As Dimension Stone, Building houses or walls, Cement Manufacture, Construction Aggregate, for Road Aggregate  

Medical Industry
-  
-  

Antiquity Uses
Artifacts, Monuments  
Artifacts  

Other Uses
  
  

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

Types

Types
Biotite hornfels  
Protocataclasite, Mesocataclasite, Ultracataclasite and Foliated cataclasite  

Features
Smooth to touch  
Easily splits into thin plates, Is one of the oldest rock  

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. Hornfels is formed from the extreme heat caused by magma or by the intense collisions and friction of tectonic plates.  
Cataclasiste rocks mainly form by pressure deep under the Earth's surface, from the extreme heat caused by magma or by the intense collisions and friction of tectonic plates.  

Composition
  
  

Mineral Content
Andalusite  
Albite, Apatite, Augite, Biotite, Calcite, Enstatite, Epidote, Feldspar, Micas, Muscovite or Illite, Pyroxene, Quartz  

Compound Content
Fe, Mg  
Silicon Dioxide  

Transformation
  
  

Metamorphism
No  
No  

Types of Metamorphism
-  
-  

Weathering
Yes  
Yes  

Types of Weathering
Biological Weathering  
Mechanical Weathering  

Erosion
Yes  
Yes  

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

Properties

Physical Properties
  
  

Hardness
2-3  
3-4  

Grain Size
Fine Grained  
Fine Grained  

Fracture
Conchoidal  
-  

Streak
-  
Black  

Porosity
Highly Porous  
Less Porous  

Luster
Shiny  
Vitreous  

Compressive Strength
5.80 N/mm2  
99+
50.00 N/mm2  
39

Cleavage
Perfect  
-  

Toughness
-  
-  

Specific Gravity
3.4-3.9  
2.1  

Transparency
Opaque  
Translucent to Opaque  

Density
0.25-0.30 g/cm3  
2.9-3.1 g/cm3  

Thermal Properties
  
  

Specific Heat Capacity
0.84 kJ/Kg K  
15
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
Bangladesh, Bhutan, China, India, North Korea, Qatar, Russia, Saudi Arabia, South Korea, Thailand  
China, India, Russia, Saudi Arabia, South Korea  

Africa
Cameroon, East Africa, Tanzania, Western Africa  
Egypt, Ethiopia, Kenya, Madagascar, Morocco, South Africa  

Europe
United Kingdom  
England, Finland, France, Spain, United Kingdom  

Others
-  
-  

Deposits in Western Continents
  
  

North America
Canada, USA  
Canada, USA  

South America
Bolivia, Brazil, Colombia, Ecuador  
Argentina, Colombia  

Deposits in Oceania Continent
  
  

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

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Hornfels vs Cataclasite 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 Hornfels and Cataclasite Reserves. 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. Cataclasite is a type of cataclastic rock that is formed by fracturing and comminution during faulting. It is normally cohesive and non-foliated, consisting of angular clasts in a finer-grained matrix. 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 Hornfels vs Cataclasite information and Hornfels vs Cataclasite characteristics in the upcoming sections.

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

More about Hornfels and Cataclasite

Here you can know more about Hornfels and Cataclasite. The life cycle of a rock consists of formation of rock, composition of rock and transformation of rock. The composition of Hornfels and Cataclasite consists of mineral content and compound content. The mineral content of Hornfels includes Andalusite and mineral content of Cataclasite includes Albite, Apatite, Augite, Biotite, Calcite, Enstatite, Epidote, Feldspar, Micas, Muscovite or Illite, Pyroxene, Quartz. You can also check out the list of all Metamorphic Rocks. When we have to compare Hornfels vs Cataclasite, the texture, color and appearance plays an important role in determining the type of rock. Hornfels is available in brown, dark greenish - grey, green, reddish brown colors whereas, Cataclasite is available in brown, green, white, yellow colors. Appearance of Hornfels is Dull and that of Cataclasite is Dull and Banded. Properties of rock is another aspect for Hornfels vs Cataclasite. The hardness of Hornfels is 2-3 and that of Cataclasite is 3-4. The types of Hornfels are Biotite hornfels whereas types of Cataclasite are Protocataclasite, Mesocataclasite, Ultracataclasite and Foliated cataclasite. Streak of rock is the color of powder produced when it is dragged across an unweathered surface. The streak of Hornfels is while that of Cataclasite is black. The specific heat capacity of Hornfels is 0.84 kJ/Kg K and that of Cataclasite 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.Hornfels is heat resistant, impact resistant, pressure resistant whereas Cataclasite is heat resistant, impact resistant, pressure resistant.

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