Pseudotachylite Rock | History

Definition

Very fine grained fault rock which is composed of glassy matrix that often contains inclusions of wall-rock fragments.

History

Origin

USA

Discoverer

Unknown

Etymology

From pseudo- +‎ tachylite, a glassy rock generated by frictional heat within faults.

Class

Metamorphic Rocks

Sub-Class

Durable Rock, Hard Rock

Family

Group

Other Categories

Fine Grained Rock, Opaque Rock

Texture

Quench

Color

Black, Brown, Green, Grey, Pink, White

Maintenance

Less

Durability

Durable

Water Resistant

✔ ✘

81% - Metamorphic Rocks Rocks have it !

Scratch Resistant

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65% - Metamorphic Rocks Rocks have it !

Stain Resistant

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42% - Metamorphic Rocks Rocks

Wind Resistant

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19% - Metamorphic Rocks Rocks have it !

Acid Resistant

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15% - Metamorphic Rocks Rocks have it !

Appearance

Dull and Soft

Uses

Architecture

Interior Uses

Decorative Aggregates, Entryways, Interior Decoration

Exterior Uses

As Building Stone, As Facing Stone, Garden Decoration

Other Architectural Uses

Curbing

Industry

Construction Industry

As Dimension Stone, Cement Manufacture, for Road Aggregate, Making natural cement

Medical Industry

Antiquity Uses

Artifacts, Monuments

Other Uses

Commercial Uses

Creating Artwork, Gemstone

Types

Cataclastic rock

Features

Host Rock for Lead

Archaeological Significance

Monuments

Famous Monuments

Sculpture

Famous Sculptures

Pictographs

Petroglyphs

Figurines

Fossils

Absent

Formation

Due to change in environmental conditions, rocks are heated and pressurized deep inside the Earth's surface. Pseudotachylite is formed from the extreme heat caused by magma or by the intense collisions and friction of tectonic plates.

Composition

Mineral Content

Iron Oxides, Pyroxene, Quartz, Stishovite, Sulfides

Compound Content

Carbon Dioxide, Silicon Dioxide, Sulfur Dioxide, Sulphur

Transformation

Metamorphism

✔ ✘

50% - Metamorphic Rocks Rocks have it !

Types of Metamorphism

Burial Metamorphism, Cataclastic Metamorphism, Contact Metamorphism

Weathering

✔ ✘

65% - Metamorphic Rocks Rocks

Types of Weathering

Erosion

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77% - Metamorphic Rocks Rocks

Types of Erosion

Properties

Physical Properties

Hardness

1 7

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Grain Size

Very fine-grained

Fracture

Uneven

Streak

Light to dark brown

Porosity

Less Porous

Luster

Vitreous

Compressive Strength

60.00 N/mm²

Rank: 37 (Overall)

0.15 450

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Cleavage

Toughness

Specific Gravity

2.46-2.86

0 8.4

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Transparency

Transparent to Translucent

Density

2.7-2.9 g/cm³

0 1400

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Thermal Properties

Specific Heat Capacity

0.92 kJ/Kg K

Rank: 10 (Overall)

0.14 3.2

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Resistance

Heat Resistant

Reserves

Deposits in Eastern Continents

Asia

South Korea

Africa

Western Africa

Europe

Great Britain, Switzerland

Others

Deposits in Western Continents

North America

South America

Deposits in Oceania Continent

Australia

Central Australia, Western Australia