Pseudotachylite

Granulite

Pseudotachylite and Granulite

Pseudotachylite

Granulite

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Definition

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

Granulite is fine to medium grained metamorphic rock with a granular of polygonal crystals.

History

Origin

USA

Central Europe

Discoverer

Unknown

Etymology

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

From Latin granulum, a little grain or fine grained

Class

Metamorphic Rocks

Sub-Class

Durable Rock, Hard Rock

Family

Group

Other Categories

Fine Grained Rock, Opaque Rock

Coarse Grained Rock, Medium Grained Rock, Opaque Rock

Texture

Quench

Granoblastic

Color

Black, Brown, Green, Grey, Pink, White

Black, Brown

Maintenance

Less

Durability

Durable

Water Resistant

✔ ✘

Scratch Resistant

✔ ✘

Stain Resistant

✔ ✘

Wind Resistant

✔ ✘

Acid Resistant

✔ ✘

Appearance

Dull and Soft

Veined or Pebbled

Uses

Architecture

Interior Uses

Decorative Aggregates, Entryways, Interior Decoration

Bathrooms, Countertops, Decorative Aggregates, Entryways, Flooring, Homes, Hotels, Interior Decoration, Kitchens, Stair Treads

Exterior Uses

As Building Stone, As Facing Stone, Garden Decoration

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

Other Architectural Uses

Curbing

Industry

Construction Industry

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

As Dimension Stone, Building houses or walls

Medical Industry

Antiquity Uses

Artifacts, Monuments

Artifacts, Monuments, Sculpture

Other Uses

Commercial Uses

Creating Artwork, Gemstone

Curling, Gemstone, Laboratory bench tops, Soil Conditioner, Tombstones

Types

Cataclastic rock

Metamorphic rock

Features

Host Rock for Lead

Clasts are smooth to touch

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.

Granulite is a fine-grained granular metamorphic rock in which the main component minerals are feldspars and quartz and forms at high temperature and pressure conditions.

Composition

Mineral Content

Iron Oxides, Pyroxene, Quartz, Stishovite, Sulfides

Amphibole, Biotite, Feldspar, Hornblade, Micas, Muscovite or Illite, Plagioclase, Quartz

Compound Content

Carbon Dioxide, Silicon Dioxide, Sulfur Dioxide, Sulphur

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

Transformation

Metamorphism

✔ ✘

Types of Metamorphism

Burial Metamorphism, Cataclastic Metamorphism, Contact Metamorphism

Weathering

✔ ✘

Types of Weathering

Biological Weathering, Chemical Weathering

Erosion

✔ ✘

Types of Erosion

Chemical Erosion, Water Erosion, Wind Erosion

Properties

Physical Properties

Hardness

76-7

1 7

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Grain Size

Very fine-grained

Medium to Coarse Grained

Fracture

Uneven

Streak

Light to dark brown

White

Porosity

Less Porous

Very Less Porous

Luster

Vitreous

Compressive Strength

60.00 N/mm²175.00 N/mm²

0.15 450

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Cleavage

Toughness

Specific Gravity

2.46-2.862.8-3.0

0 8.4

👆🏻

Transparency

Transparent to Translucent

Opaque

Density

2.7-2.9 g/cm³3.06-3.33 g/cm³

0 1400

👆🏻

Thermal Properties

Specific Heat Capacity

0.92 kJ/Kg K0.14 kJ/Kg K

0.14 3.2

👆🏻

Resistance

Heat Resistant

Heat Resistant, Wear Resistant

Reserves

Deposits in Eastern Continents

Asia

South Korea

China, India, Iran, Saudi Arabia, Sri Lanka, Taiwan, Thailand, Turkey, Vietnam

Africa

Western Africa

Angola, Egypt, Madagascar, Nigeria, South Africa

Europe

Great Britain, Switzerland

Austria, Belgium, Finland, France, Germany, Italy, Norway, Sardinia, Spain, Switzerland, The Czech Republic

Others

Deposits in Western Continents

North America

Canada, USA

South America

Deposits in Oceania Continent

Australia

Central Australia, Western Australia

All about Pseudotachylite and Granulite Properties

Know all about Pseudotachylite and Granulite properties here. All properties of rocks are important as they define the type of rock and its application. Pseudotachylite and Granulite belong to Metamorphic Rocks.Texture of Pseudotachylite is Quench whereas that of Granulite is Granoblastic. Pseudotachylite appears Dull and Soft and Granulite appears Veined or Pebbled. The luster of Pseudotachylite and Granulite is vitreous. Pseudotachylite and Granulite are available in black, brown, green, grey, pink, white colors. The commercial uses of Pseudotachylite are creating artwork, gemstone and that of Granulite are curling, gemstone, laboratory bench tops, soil conditioner, tombstones.