Mylonite

Trachyandesite

Mylonite and Trachyandesite

Mylonite

Trachyandesite

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1 Definition

1.1 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

Trachyandesite is an extrusive igneous rock.

1.2 History

1.2.1 Origin

New Zealand

Indonesia

1.2.2 Discoverer

Unknown

1.3 Etymology

From Greek mulōn mill + -ite

From French trachyandésite, trachy + andésite andesite, a lava intermediate in composition between trachyte and andesite

1.4 Class

Metamorphic Rocks

Igneous Rocks

1.4.1 Sub-Class

Durable Rock, Medium Hardness Rock

1.5 Family

1.5.1 Group

Not Applicable

Volcanic

1.6 Other Categories

Fine Grained Rock, Opaque Rock

2 Texture

2.1 Texture

Foliated

Glassy, Massive, Porphyritic, Scoriaceous, Vesicular

2.2 Color

Black to Grey

Black, Brown, Light to Dark Grey

2.3 Maintenance

Less

2.4 Durability

Durable

2.4.1 Water Resistant

✔ ✘

2.4.2 Scratch Resistant

✔ ✘

2.4.3 Stain Resistant

✔ ✘

2.4.4 Wind Resistant

✔ ✘

2.4.5 Acid Resistant

✔ ✘

2.5 Appearance

Dull, Banded and Foilated

Dull and Soft

3 Uses

3.1 Architecture

3.1.1 Interior Uses

Decorative Aggregates, Interior Decoration

Countertops, Decorative Aggregates, Homes, Interior Decoration

3.1.2 Exterior Uses

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

As Building Stone, As Facing Stone, Garden Decoration

3.1.3 Other Architectural Uses

Curbing

3.2 Industry

3.2.1 Construction Industry

for Road Aggregate, Landscaping, Roadstone

Building houses or walls, Cobblestones, for Road Aggregate, Rail Track Ballast, Roadstone

3.2.2 Medical Industry

Not Yet Used

3.3 Antiquity Uses

Artifacts, Monuments

Artifacts, Sculpture

3.4 Other Uses

3.4.1 Commercial Uses

Creating Artwork, Gemstone, Jewelry

Creating Artwork, Pottery

4 Types

4.1 Types

Blastomylonites, Ultramylonites and Phyllonites

Basaltic Trachyandesite

4.2 Features

Surfaces are often shiny

Has High structural resistance against erosion and climate, Very fine grained rock

4.3 Archaeological Significance

4.3.1 Monuments

Used

Not Yet Used

4.3.2 Famous Monuments

Data Not Available

Not Applicable

4.3.3 Sculpture

Used

4.3.4 Famous Sculptures

Data Not Available

4.3.5 Pictographs

Used

4.3.6 Petroglyphs

Used

4.3.7 Figurines

Used

4.4 Fossils

Absent

5 Formation

5.1 Formation

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

Trachyandesite is a fine-grained, hard rock which is a type of metasomatite, essentially altered basalt. It forms with or without crystallization, either below the surface as intrusive rocks or on the surface as extrusive rocks.

5.2 Composition

5.2.1 Mineral Content

Porphyroblasts

Alkali feldspar, Biotite, Olivine, Plagioclase, Pyroxene, Sodic plagioclase

5.2.2 Compound Content

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

Aluminium Oxide, CaO, Iron(III) Oxide, FeO, Potassium Oxide, MgO, MnO, Sodium Oxide, Phosphorus Pentoxide, Silicon Dioxide, Titanium Dioxide

5.3 Transformation

5.3.1 Metamorphism

✔ ✘

5.3.2 Types of Metamorphism

Not Applicable

Cataclastic Metamorphism, Contact Metamorphism, Regional Metamorphism

5.3.3 Weathering

✔ ✘

5.3.4 Types of Weathering

Biological Weathering, Chemical Weathering, Mechanical Weathering

5.3.5 Erosion

✔ ✘

5.3.6 Types of Erosion

Chemical Erosion, Sea Erosion, Wind Erosion

Chemical Erosion, Coastal Erosion, Water Erosion, Wind Erosion

6 Properties

6.1 Physical Properties

6.1.1 Hardness

3-44-5

1 7

6.1.2 Grain Size

Fine Grained

6.1.3 Fracture

Conchoidal

6.1.4 Streak

White

Light to dark brown

6.1.5 Porosity

Highly Porous

Less Porous

6.1.6 Luster

Shiny

Earthy

6.1.7 Compressive Strength

1.28 N/mm²37.40 N/mm²

0.15 450

6.1.8 Cleavage

Conchoidal

Perfect

6.1.9 Toughness

Not Available

2.3

6.1.10 Specific Gravity

2.97-3.052.8-3

0 8.4

6.1.11 Transparency

Opaque

6.1.12 Density

2.6-4.8 g/cm³2.9-3.1 g/cm³

0 1400

6.2 Thermal Properties

6.2.1 Specific Heat Capacity

1.50 kJ/Kg K0.84 kJ/Kg K

0.14 3.2

6.2.2 Resistance

Heat Resistant, Impact Resistant, Pressure Resistant

Heat Resistant, Pressure Resistant, Wear Resistant

7 Reserves

7.1 Deposits in Eastern Continents

7.1.1 Asia

China, India, Indonesia, Saudi Arabia, South Korea

India, Russia

7.1.2 Africa

Eritrea, Ethiopia, Ghana, South Africa, Western Africa

South Africa

7.1.3 Europe

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

Iceland

7.1.4 Others

Not Yet Found

7.2 Deposits in Western Continents

7.2.1 North America

USA

Canada, USA

7.2.2 South America

Not Yet Found

Brazil

7.3 Deposits in Oceania Continent

7.3.1 Australia

Central Australia, Western Australia

Not Yet Found

All about Mylonite and Trachyandesite Properties

Know all about Mylonite and Trachyandesite properties here. All properties of rocks are important as they define the type of rock and its application. Mylonite belongs to Metamorphic Rocks while Trachyandesite belongs to Igneous Rocks.Texture of Mylonite is Foliated whereas that of Trachyandesite is Glassy, Massive, Porphyritic, Scoriaceous, Vesicular. Mylonite appears Dull, Banded and Foilated and Trachyandesite appears Dull and Soft. The luster of Mylonite is shiny while that of Trachyandesite is earthy. Mylonite is available in black to grey colors whereas Trachyandesite is available in black, brown, light to dark grey colors. The commercial uses of Mylonite are creating artwork, gemstone, jewelry and that of Trachyandesite are creating artwork, pottery.