Mylonite

Argillite

Mylonite vs Argillite

Mylonite

Argillite

Add ⊕

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

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

New Zealand

Discoverer

Unknown

Etymology

From Greek mulōn mill + -ite

From Latin Argilla (clay) and -ite in English which became agrilla+ -ite = Argillite

Class

Metamorphic Rocks

Sedimentary Rocks

Sub-Class

Durable Rock, Medium Hardness Rock

Durable Rock, Soft Rock

Family

Group

Other Categories

Fine Grained Rock, Opaque Rock

Texture

Foliated

Clastic, Polished

Color

Black to Grey

Dark Grey to Black, Pink, Red, White

Maintenance

Less

Durability

Durable

Water Resistant

✔ ✘

Scratch Resistant

✔ ✘

Stain Resistant

✔ ✘

Wind Resistant

✔ ✘

Acid Resistant

✔ ✘

Appearance

Dull, Banded and Foilated

Rough and Dull

Uses

Architecture

Interior Uses

Decorative Aggregates, Interior Decoration

Decorative Aggregates, Homes, Interior Decoration

Exterior Uses

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

As Building Stone, Garden Decoration, Office Buildings

Other Architectural Uses

Curbing

Curbing, Whetstones

Industry

Construction Industry

for Road Aggregate, Landscaping, Roadstone

Used for flooring, stair treads, borders and window sills.

Medical Industry

Antiquity Uses

Artifacts, Monuments

Artifacts, Monuments, Sculpture

Other Uses

Commercial Uses

Creating Artwork, Gemstone, Jewelry

Fire resistant, Used to manufracture paperweights and bookends

Types

Blastomylonites, Ultramylonites and Phyllonites

Metamorphic rock

Features

Surfaces are often shiny

Is one of the oldest rock

Archaeological Significance

Monuments

Famous Monuments

Sculpture

Famous Sculptures

Pictographs

Petroglyphs

Figurines

Fossils

Absent

Present

Formation

Mylonites are ductilely deformed rocks formed by the accumulation of large shear strain, in ductile fault zones.

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

Porphyroblasts

Biotite, Chlorite, Feldspar, Micas, Muscovite or Illite, Plagioclase, Pyrite, Quartz

Compound Content

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

Iron(III) Oxide, Potassium Oxide, MgO, Silicon Dioxide

Transformation

Metamorphism

✔ ✘

Types of Metamorphism

Weathering

✔ ✘

Types of Weathering

Biological Weathering, Chemical Weathering, Mechanical Weathering

Biological Weathering

Erosion

✔ ✘

Types of Erosion

Chemical Erosion, Sea Erosion, Wind Erosion

Chemical Erosion

Properties

Physical Properties

Hardness

3-42-3

1 7

👆🏻

Grain Size

Fine Grained

Fracture

Conchoidal

Conchoidal to Uneven

Streak

White

White to Grey

Porosity

Highly Porous

Luster

Shiny

Waxy and Dull

Compressive Strength

1.28 N/mm²-

0.15 450

👆🏻

Cleavage

Conchoidal

Slaty

Toughness

2.6

Specific Gravity

2.97-3.052.56-2.68

0 8.4

👆🏻

Transparency

Opaque

Density

2.6-4.8 g/cm³2.54-2.66 g/cm³

0 1400

👆🏻

Thermal Properties

Specific Heat Capacity

1.50 kJ/Kg K0.87 kJ/Kg K

0.14 3.2

👆🏻

Resistance

Heat Resistant, Impact Resistant, Pressure Resistant

Heat Resistant, Impact Resistant

Reserves

Deposits in Eastern Continents

Asia

China, India, Indonesia, Saudi Arabia, South Korea

Bangladesh, China, India, Russia

Africa

Eritrea, Ethiopia, Ghana, South Africa, Western Africa

Ethiopia, Kenya, Morocco, South Africa, Tanzania

Europe

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

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

Others

Deposits in Western Continents

North America

USA

South America

Bolivia, Chile, Colombia, Ecuador, Peru, Venezuela

Deposits in Oceania Continent

Australia

Central Australia, Western Australia

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

Mylonite 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 Mylonite and Argillite 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. 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 Mylonite vs Argillite information and Mylonite vs Argillite characteristics in the upcoming sections.

Compare Metamorphic Rocks » More

Mylonite vs Skarn

Mylonite vs Serpentinite

Mylonite vs Pseudotachylite

» More Compare Metamorphic Rocks

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

More about Mylonite and Argillite

Here you can know more about Mylonite and Argillite. The life cycle of a rock consists of formation of rock, composition of rock and transformation of rock. The composition of Mylonite and Argillite consists of mineral content and compound content. The mineral content of Mylonite includes Porphyroblasts 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 Metamorphic Rocks. When we have to compare Mylonite vs Argillite, the texture, color and appearance plays an important role in determining the type of rock. Mylonite is available in black to grey colors whereas, Argillite is available in dark grey to black, pink, red, white colors. Appearance of Mylonite is Dull, Banded and Foilated and that of Argillite is Rough and Dull. Properties of rock is another aspect for Mylonite vs Argillite. The hardness of Mylonite is 3-4 and that of Argillite is 2-3. The types of Mylonite are Blastomylonites, Ultramylonites and Phyllonites 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 Mylonite is white while that of Argillite is white to grey. The specific heat capacity of Mylonite is 1.50 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.Mylonite is heat resistant, impact resistant, pressure resistant whereas Argillite is heat resistant, impact resistant.