Pseudotachylite

Soapstone

Pseudotachylite and Soapstone

Pseudotachylite

Soapstone

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1 Definition

1.1 Definition

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

It is a metamorphic magnesium rich rock because it is composed of the mineral talc

1.2 History

1.2.1 Origin

USA

1.2.2 Discoverer

Unknown

1.3 Etymology

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

From 17th century, because of its greasy feel and use like a soap

1.4 Class

Metamorphic Rocks

1.4.1 Sub-Class

Durable Rock, Hard Rock

Durable Rock, Soft Rock

1.5 Family

1.5.1 Group

Not Applicable

1.6 Other Categories

Fine Grained Rock, Opaque Rock

2 Texture

2.1 Texture

Quench

Polished

2.2 Color

Black, Brown, Colourless, Green, Grey, Pink, White

Black, Black to Grey, Green, Grey

2.3 Maintenance

Less

2.4 Durability

Durable

2.4.1 Water Resistant

✔ ✘

81% Metamorphic Rocks Rocks have it !

✔ ✘

81% Metamorphic Rocks Rocks have it !

2.4.2 Scratch Resistant

✔ ✘

65% Metamorphic Rocks Rocks have it !

✔ ✘

65% Metamorphic Rocks Rocks have it !

2.4.3 Stain Resistant

✔ ✘

42% Metamorphic Rocks Rocks have it !

✔ ✘

42% Metamorphic Rocks Rocks have it !

2.4.4 Wind Resistant

✔ ✘

19% Metamorphic Rocks Rocks have it !

✔ ✘

19% Metamorphic Rocks Rocks have it !

2.4.5 Acid Resistant

✔ ✘

15% Metamorphic Rocks Rocks have it !

✔ ✘

15% Metamorphic Rocks Rocks have it !

2.5 Appearance

Dull and Soft

Dull, Banded and Foilated

3 Uses

3.1 Architecture

3.1.1 Interior Uses

Decorative Aggregates, Entryways, Interior Decoration

Bathrooms, Decorative Aggregates, Homes, Interior Decoration

3.1.2 Exterior Uses

As Building Stone, As Facing Stone, Garden Decoration

As Facing Stone, Garden Decoration

3.1.3 Other Architectural Uses

Curbing

3.2 Industry

3.2.1 Construction Industry

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

Manufacture of Magnesium and Dolomite Refractories

3.2.2 Medical Industry

Not Yet Used

Taken as a Supplement for Calcium or Magnesium

3.3 Antiquity Uses

Artifacts, Monuments

Artifacts, Jewellery, Monuments, Sculpture

3.4 Other Uses

3.4.1 Commercial Uses

Creating Artwork, Gemstone

Cemetery Markers, Creating Artwork, Gemstone, Jewelry, Manufacture of Soap, Solvents, Dyes, Plastics and Fibres, Production of Lime, Source of Magnesia (MgO)

4 Types

4.1 Types

Not Available

4.2 Features

Host Rock for Lead

4.3 Archaeological Significance

4.3.1 Monuments

Used

4.3.2 Famous Monuments

Data Not Available

Christ the Redeemer in Rio de Janeiro, Stonehenge in English county of Wiltshire

4.3.3 Sculpture

Not Yet Used

Used

4.3.4 Famous Sculptures

Not Applicable

Data Not Available

4.3.5 Pictographs

Not Used

Used

4.3.6 Petroglyphs

Not Used

Used

4.3.7 Figurines

Not Yet Used

Used

4.4 Fossils

Absent

5 Formation

5.1 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.

Soapstone is a talc-schist, which is a type of metamorphic rock and it is largely composed of the mineral talc and is thus rich inmagnesium.

5.2 Composition

5.2.1 Mineral Content

Iron Oxides, Pyroxene, Quartz, Stishovite, Sulfides

Albite, Apatite, Biotite, Calcite, Carbonate, Clay Minerals, Hornblende, Ilmenite, Micas, Plagioclase, Pyroxene, Quartz

5.2.2 Compound Content

Carbon Dioxide, Silicon Dioxide, Sulfur Dioxide, Sulphur

CaO, Mg, MgO

5.3 Transformation

5.3.1 Metamorphism

✔ ✘

50% Metamorphic Rocks Rocks have it !

✔ ✘

50% Metamorphic Rocks Rocks have it !

5.3.2 Types of Metamorphism

Burial Metamorphism, Cataclastic Metamorphism, Contact Metamorphism

Burial Metamorphism, Cataclastic Metamorphism, Contact Metamorphism, Hydrothermal Metamorphism, Impact Metamorphism, Regional Metamorphism

5.3.3 Weathering

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65% Metamorphic Rocks Rocks have it !

✔ ✘

65% Metamorphic Rocks Rocks have it !

5.3.4 Types of Weathering

Not Applicable

5.3.5 Erosion

✔ ✘

77% Metamorphic Rocks Rocks have it !

✔ ✘

77% Metamorphic Rocks Rocks have it !

5.3.6 Types of Erosion

Not Applicable

6 Properties

6.1 Physical Properties

6.1.1 Hardness

6.1.2 Grain Size

Very fine-grained

Fine Grained

6.1.3 Fracture

Uneven

Conchoidal

6.1.4 Streak

Light to dark brown

Black

6.1.5 Porosity

Less Porous

6.1.6 Luster

Vitreous

Greasy

6.1.7 Compressive Strength

What Is Flint

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▶

▼

60.00 N/mm²

Rank: 25 (Overall)▶

225.00 N/mm²

Rank: 7 (Overall)▶

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What Is Obsidian

⊕

▶

175 (What Is Grani..)

◀ ▶ ADD ⊕

6.1.8 Cleavage

Irregular

Perfect

6.1.9 Toughness

Not Available

6.1.10 Specific Gravity

2.46-2.86

2.86

6.1.11 Transparency

Transparent to Translucent

Opaque

6.1.12 Density

2.7-2.9 g/cm³

2.8-2.9 g/cm³

6.2 Thermal Properties

6.2.1 Specific Heat Capacity

What Is Banded ..

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▶

▼

0.92 kJ/Kg K

Rank: 10 (Overall)▶

0.88 kJ/Kg K

Rank: 13 (Overall)▶

▲

What Is Granulite

⊕

▶

1.09 (What Is Trave..)

◀ ▶ ADD ⊕

6.2.2 Resistance

Heat Resistant

Heat Resistant, Pressure Resistant

7 Reserves

7.1 Deposits in Eastern Continents

7.1.1 Asia

South Korea

China, India, Indonesia, Japan, North Korea, Russia, Saudi Arabia, Singapore, South Korea, Sri Lanka, Tajikistan, Thailand

7.1.2 Africa

Western Africa

Egypt, Ethiopia, Ghana, South Africa, Western Africa

7.1.3 Europe

Great Britain, Switzerland

Austria, England, Finland, France, Germany, Greece, Spain, Sweden, Switzerland, United Kingdom

7.1.4 Others

Not Yet Found

7.2 Deposits in Western Continents

7.2.1 North America

Not Yet Found

Canada, USA

7.2.2 South America

Not Yet Found

Colombia

7.3 Deposits in Oceania Continent

7.3.1 Australia

Central Australia, Western Australia

Central Australia, New Zealand, Queensland

All about Pseudotachylite and Soapstone Properties

Know all about Pseudotachylite and Soapstone properties here. All properties of rocks are important as they define the type of rock and its application. Pseudotachylite and Soapstone belong to Metamorphic Rocks.Texture of Pseudotachylite is Quench whereas that of Soapstone is Polished. Pseudotachylite appears Dull and Soft and Soapstone appears Dull, Banded and Foilated. The luster of Pseudotachylite is vitreous while that of Soapstone is greasy. Pseudotachylite is available in black, brown, colourless, green, grey, pink, white colors whereas Soapstone is available in black, black to grey, green, grey colors. The commercial uses of Pseudotachylite are creating artwork, gemstone and that of Soapstone are cemetery markers, creating artwork, gemstone, jewelry, manufacture of soap, solvents, dyes, plastics and fibres, production of lime, source of magnesia (mgo).