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Mylonite
Mylonite

Schist
Schist



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Mylonite
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Mylonite vs Schist

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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
Schist is a medium grade metamorphic rock with medium to large, flat, sheet like grains in a preferred orientation

History

Origin

New Zealand
-

Discoverer

Unknown
Unknown

Etymology

From Greek mulōn mill + -ite
From French schiste, Greek skhistos i.e. split

Class

Metamorphic Rocks
Metamorphic Rocks

Sub-Class

Durable Rock, Medium Hardness Rock
Durable Rock, Medium Hardness Rock

Family

Group

-
-

Other Categories

Fine Grained Rock, Opaque Rock
Coarse Grained Rock, Fine Grained Rock, Medium Grained Rock, Opaque Rock

Texture

Texture

Foliated
Foliated, Platy

Color

Black to Grey
Black, Blue, Brown, Dark Brown, Green, Grey, Silver

Maintenance

Less
Less

Durability

Durable
Durable

Water Resistant

Scratch Resistant

Stain Resistant

Wind Resistant

Acid Resistant

Appearance

Dull, Banded and Foilated
Layered and Shiny

Uses

Architecture

Interior Uses

Decorative Aggregates, Interior Decoration
Decorative Aggregates, Floor Tiles, Interior Decoration

Exterior Uses

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

Other Architectural Uses

Curbing
-

Industry

Construction Industry

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

Medical Industry

-
-

Antiquity Uses

Artifacts, Monuments
Artifacts

Other Uses

Commercial Uses

Creating Artwork, Gemstone, Jewelry
Used in aquariums, Writing Slates

Types

Types

Blastomylonites, Ultramylonites and Phyllonites
Mica Schists, Calc-Silicate Schists, Graphite Schists, Blueschists, Whiteschists, Greenschists, Hornblende Schist, Talc Schist, Chlorite Schist, Garnet Schist, Glaucophane schist.

Features

Surfaces are often shiny
Easily splits into thin plates, Smooth to touch

Archaeological Significance

Monuments

-
-

Famous Monuments

-
-

Sculpture

-
-

Famous Sculptures

-
-

Pictographs

-
-

Petroglyphs

-
-

Figurines

-
-

Fossils

Absent
Absent

Formation

Formation

Mylonites are ductilely deformed rocks formed by the accumulation of large shear strain, in ductile fault zones.
Schist formed by dynamic metamorphism at high temperatures and pressures that aligns the grains of mica, hornblende and other elongated minerals into thin layers.

Composition

Mineral Content

Porphyroblasts
Alusite, Amphibole, Biotite, Chlorite, Epidote, Feldspar, Garnet, Graphite, Hornblade, Kyanite, Micas, Muscovite or Illite, Porphyroblasts, Quartz, Sillimanite, Staurolite, Talc

Compound Content

Aluminium Oxide, Calcium Sulfate, Chromium(III) Oxide, Iron(III) Oxide, Magnesium Carbonate, Silicon Dioxide
CaO, Carbon Dioxide, MgO

Transformation

Metamorphism

Types of Metamorphism

-
-

Weathering

Types of Weathering

Biological Weathering, Chemical Weathering, Mechanical Weathering
Biological Weathering, Chemical Weathering, Mechanical Weathering

Erosion

Types of Erosion

Chemical Erosion, Sea Erosion, Wind Erosion
Chemical Erosion, Coastal Erosion, Glacier Erosion

Properties

Physical Properties

Hardness

3-43.5-4
1 7
👆🏻

Grain Size

Fine Grained
Medium to Fine Coarse Grained

Fracture

Conchoidal
Conchoidal

Streak

White
White

Porosity

Highly Porous
Highly Porous

Luster

Shiny
Shiny

Compressive Strength

1.28 N/mm2150.00 N/mm2
0.15 450
👆🏻

Cleavage

Conchoidal
Slaty

Toughness

-
1.5

Specific Gravity

2.97-3.052.5-2.9
0 8.4
👆🏻

Transparency

Opaque
Opaque

Density

2.6-4.8 g/cm32.8-2.9 g/cm3
0 1400
👆🏻

Thermal Properties

Specific Heat Capacity

1.50 kJ/Kg K0.70 kJ/Kg K
0.14 3.2
👆🏻

Resistance

Heat Resistant, Impact Resistant, Pressure Resistant
Impact Resistant, Pressure Resistant, Water Resistant

Reserves

Deposits in Eastern Continents

Asia

China, India, Indonesia, Saudi Arabia, South Korea
Afghanistan, Bangladesh, Bhutan, China, India, Japan, Kazakhstan, Malaysia, Pakistan, Russia, Thailand, Turkey, Vietnam

Africa

Eritrea, Ethiopia, Ghana, South Africa, Western Africa
Egypt, Ethiopia, Morocco, Nigeria, South Africa

Europe

England, Finland, France, Germany, Great Britain, Greece, United Kingdom
Austria, England, France, Georgia, Germany, Italy, Liechtenstein, Monaco, Norway, Slovenia, Spain, Sweden, Switzerland

Others

-
-

Deposits in Western Continents

North America

USA
Canada, Costa Rica, Cuba, Mexico, Panama, USA

South America

-
Brazil, Colombia, Guyana

Deposits in Oceania Continent

Australia

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

Mylonite vs Schist 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 Schist 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. Schist is a medium grade metamorphic rock with medium to large, flat, sheet like grains in a preferred orientation. 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 Schist information and Mylonite vs Schist characteristics in the upcoming sections.

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

More about Mylonite and Schist

Here you can know more about Mylonite and Schist. The life cycle of a rock consists of formation of rock, composition of rock and transformation of rock. The composition of Mylonite and Schist consists of mineral content and compound content. The mineral content of Mylonite includes Porphyroblasts and mineral content of Schist includes Alusite, Amphibole, Biotite, Chlorite, Epidote, Feldspar, Garnet, Graphite, Hornblade, Kyanite, Micas, Muscovite or Illite, Porphyroblasts, Quartz, Sillimanite, Staurolite, Talc. You can also check out the list of all Metamorphic Rocks. When we have to compare Mylonite vs Schist, the texture, color and appearance plays an important role in determining the type of rock. Mylonite is available in black to grey colors whereas, Schist is available in black, blue, brown, dark brown, green, grey, silver colors. Appearance of Mylonite is Dull, Banded and Foilated and that of Schist is Layered and Shiny. Properties of rock is another aspect for Mylonite vs Schist. The hardness of Mylonite is 3-4 and that of Schist is 3.5-4. The types of Mylonite are Blastomylonites, Ultramylonites and Phyllonites whereas types of Schist are Mica Schists, Calc-Silicate Schists, Graphite Schists, Blueschists, Whiteschists, Greenschists, Hornblende Schist, Talc Schist, Chlorite Schist, Garnet Schist, Glaucophane schist.. Streak of rock is the color of powder produced when it is dragged across an unweathered surface. The streak of Mylonite and Schist is white. The specific heat capacity of Mylonite is 1.50 kJ/Kg K and that of Schist is 0.70 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 Schist is impact resistant, pressure resistant, water resistant.