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Websterite vs Argillite


Argillite vs Websterite


Definition

Definition
Websterite is ultramafic and ultrabasic rock that consists of roughly equal proportions of orthopyroxene and clinopyroxene. It is a special type of pyroxenite.  
Argillites are highly compact sedimentary or slightly metamorphosed rocks that consist largely or wholly of particles of clay or silt but lack the fissility of shale or the cleavage characteristic of slate  

History
  
  

Origin
Webster, North Carolina  
-  

Discoverer
Unknown  
Unknown  

Etymology
From the town of Webster located in North Carolina  
From Latin Argilla (clay) and -ite in English which became agrilla+ -ite = Argillite  

Class
Igneous Rocks  
Sedimentary Rocks  

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

Family
  
  

Group
Plutonic  
-  

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

Texture

Texture
Clastic, Granular, Phaneritic, Porphyritic  
Clastic, Polished  

Color
Black to Grey, Bluish - Grey, Dark Greenish - Grey, Green, Light Greenish Grey  
Dark Grey to Black, Pink, Red, White  

Maintenance
Less  
Less  

Durability
Durable  
Durable  

Water Resistant
Yes  
No  

Scratch Resistant
Yes  
Yes  

Stain Resistant
Yes  
Yes  

Wind Resistant
Yes  
Yes  

Acid Resistant
Yes  
Yes  

Appearance
Layered, Banded, Veined and Shiny  
Rough and Dull  

Uses

Architecture
  
  

Interior Uses
Countertops, Decorative Aggregates, Entryways, Floor Tiles, Flooring, Interior Decoration  
Decorative Aggregates, Homes, Interior Decoration  

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

Other Architectural Uses
Curbing  
Curbing, Whetstones  

Industry
  
  

Construction Industry
As Dimension Stone, Building houses or walls, Cement Manufacture, Construction Aggregate, for Road Aggregate  
Used for flooring, stair treads, borders and window sills.  

Medical Industry
-  
-  

Antiquity Uses
Artifacts  
Artifacts, Monuments, Sculpture  

Other Uses
  
  

Commercial Uses
Cemetery Markers, Commemorative Tablets, Creating Artwork, Laboratory bench tops, Jewelry, Sea Defence, Tombstones  
Fire resistant, Used to manufracture paperweights and bookends  

Types

Types
Ultramafic rock  
Metamorphic rock  

Features
Generally rough to touch, Is one of the oldest rock  
Is one of the oldest rock  

Archaeological Significance
  
  

Monuments
-  
-  

Famous Monuments
-  
-  

Sculpture
-  
-  

Famous Sculptures
-  
-  

Pictographs
-  
-  

Petroglyphs
-  
-  

Figurines
-  
-  

Fossils
Absent  
Present  

Formation

Formation
Websterite can be formed as cumulates in ultramafic intrusions by accumulation of pyroxene crystals at the base of the lava chamber.  
An argillite is a fine-grained sedimentary rock mainly composed of clay particles which forms from lithified muds which contain variable amounts of silt-sized particles.  

Composition
  
  

Mineral Content
Amphibole, Augite, Bronzite, Chromite, Diopside, Enstatite, Garnet, Hornblende, Hypersthene, Magnetite, Pyroxene  
Biotite, Chlorite, Feldspar, Micas, Muscovite or Illite, Plagioclase, Pyrite, Quartz  

Compound Content
Aluminium Oxide, CaO, Chromium(III) Oxide, Iron(III) Oxide, Potassium Oxide, MgO, Sodium Oxide, Silicon Dioxide, Sulfur Trioxide  
Iron(III) Oxide, Potassium Oxide, MgO, Silicon Dioxide  

Transformation
  
  

Metamorphism
Yes  
No  

Types of Metamorphism
Burial Metamorphism, Impact Metamorphism  
-  

Weathering
Yes  
Yes  

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

Erosion
Yes  
Yes  

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

Properties

Physical Properties
  
  

Hardness
7  
2-3  

Grain Size
Coarse Grained  
Fine Grained  

Fracture
Uneven  
Conchoidal to Uneven  

Streak
White, Greenish White or Grey  
White to Grey  

Porosity
Less Porous  
Highly Porous  

Luster
Dull to Vitreous to Submetallic  
Waxy and Dull  

Compressive Strength
95.00 N/mm2  
30
-  

Cleavage
-  
Slaty  

Toughness
-  
2.6  

Specific Gravity
3.2-3.5  
2.56-2.68  

Transparency
Opaque  
Opaque  

Density
3.1-3.6 g/cm3  
2.54-2.66 g/cm3  

Thermal Properties
  
  

Specific Heat Capacity
0.79 kJ/Kg K  
17
0.87 kJ/Kg K  
14

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

Reserves

Deposits in Eastern Continents
  
  

Asia
India, Russia  
Bangladesh, China, India, Russia  

Africa
South Africa  
Ethiopia, Kenya, Morocco, South Africa, Tanzania  

Europe
Germany, Greece, Italy, Scotland, Turkey  
Austria, France, Germany, Greece, Italy, Romania, Scotland, Spain, Switzerland  

Others
Greenland  
-  

Deposits in Western Continents
  
  

North America
Canada, USA  
USA  

South America
Brazil, Colombia, Venezuela  
Bolivia, Chile, Colombia, Ecuador, Peru, Venezuela  

Deposits in Oceania Continent
  
  

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

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Websterite vs Argillite 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 Websterite and Argillite Reserves. Websterite is ultramafic and ultrabasic rock that consists of roughly equal proportions of orthopyroxene and clinopyroxene. It is a special type of pyroxenite.. Argillites are highly compact sedimentary or slightly metamorphosed rocks that consist largely or wholly of particles of clay or silt but lack the fissility of shale or the cleavage characteristic of slate. 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 Websterite vs Argillite information and Websterite vs Argillite characteristics in the upcoming sections.

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Websterite vs Argillite 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. Websterite vs Argillite characteristics assist us to distinguish and recognize rocks. Also you can check about Properties of Websterite and Properties of Argillite. Learn more about Websterite vs Argillite in the next section. The interior uses of Websterite include Countertops, Decorative aggregates, Entryways, Floor tiles, Flooring and Interior decoration whereas the interior uses of Argillite include Decorative aggregates, Homes and Interior decoration. Due to some exceptional properties of Websterite and Argillite, they have various applications in construction industry. The uses of Websterite in construction industry include As dimension stone, Building houses or walls, Cement manufacture, Construction aggregate, For road aggregate and that of Argillite include Used for flooring, stair treads, borders and window sills..

More about Websterite and Argillite

Here you can know more about Websterite and Argillite. The life cycle of a rock consists of formation of rock, composition of rock and transformation of rock. The composition of Websterite and Argillite consists of mineral content and compound content. The mineral content of Websterite includes Amphibole, Augite, Bronzite, Chromite, Diopside, Enstatite, Garnet, Hornblende, Hypersthene, Magnetite, Pyroxene and mineral content of Argillite includes Biotite, Chlorite, Feldspar, Micas, Muscovite or Illite, Plagioclase, Pyrite, Quartz. You can also check out the list of all Igneous Rocks. When we have to compare Websterite vs Argillite, the texture, color and appearance plays an important role in determining the type of rock. Websterite is available in black to grey, bluish - grey, dark greenish - grey, green, light greenish grey colors whereas, Argillite is available in dark grey to black, pink, red, white colors. Appearance of Websterite is Layered, Banded, Veined and Shiny and that of Argillite is Rough and Dull. Properties of rock is another aspect for Websterite vs Argillite. The hardness of Websterite is 7 and that of Argillite is 2-3. The types of Websterite are Ultramafic rock whereas types of Argillite are Metamorphic rock. Streak of rock is the color of powder produced when it is dragged across an unweathered surface. The streak of Websterite is white, greenish white or grey while that of Argillite is white to grey. The specific heat capacity of Websterite is 0.79 kJ/Kg K and that of Argillite is 0.87 kJ/Kg K. Depending on the properties like hardness, toughness, specific heat capacity, porosity etc., rocks are resistant to heat, wear, impact, etc.Websterite is impact resistant, pressure resistant, wear resistant whereas Argillite is heat resistant, impact resistant.

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