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Websterite
Websterite

Pseudotachylite
Pseudotachylite



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Websterite
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Pseudotachylite

Websterite vs Pseudotachylite

Definition

Definition

Websterite is ultramafic and ultrabasic rock that consists of roughly equal proportions of orthopyroxene and clinopyroxene. It is a special type of pyroxenite.
Very fine grained fault rock which is composed of glassy matrix that often contains inclusions of wall-rock fragments.

History

Origin

Webster, North Carolina
USA

Discoverer

Unknown
Unknown

Etymology

From the town of Webster located in North Carolina
From pseudo- +‎ tachylite, a glassy rock generated by frictional heat within faults.

Class

Igneous Rocks
Metamorphic Rocks

Sub-Class

Durable Rock, Hard Rock
Durable Rock, Hard Rock

Family

Group

Plutonic
-

Other Categories

Coarse Grained Rock, Opaque Rock
Fine Grained Rock, Opaque Rock

Texture

Texture

Clastic, Granular, Phaneritic, Porphyritic
Quench

Color

Black to Grey, Bluish - Grey, Dark Greenish - Grey, Green, Light Greenish Grey
Black, Brown, Green, Grey, Pink, White

Maintenance

Less
Less

Durability

Durable
Durable

Water Resistant

Scratch Resistant

Stain Resistant

Wind Resistant

Acid Resistant

Appearance

Layered, Banded, Veined and Shiny
Dull and Soft

Uses

Architecture

Interior Uses

Countertops, Decorative Aggregates, Entryways, Floor Tiles, Flooring, Interior Decoration
Decorative Aggregates, Entryways, Interior Decoration

Exterior Uses

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

Other Architectural Uses

Curbing
Curbing

Industry

Construction Industry

As Dimension Stone, Building houses or walls, Cement Manufacture, Construction Aggregate, for Road Aggregate
As Dimension Stone, Cement Manufacture, for Road Aggregate, Making natural cement

Medical Industry

-
-

Antiquity Uses

Artifacts
Artifacts, Monuments

Other Uses

Commercial Uses

Cemetery Markers, Commemorative Tablets, Creating Artwork, Laboratory bench tops, Jewelry, Sea Defence, Tombstones
Creating Artwork, Gemstone

Types

Types

Ultramafic rock
Cataclastic rock

Features

Generally rough to touch, Is one of the oldest rock
Host Rock for Lead

Archaeological Significance

Monuments

-
-

Famous Monuments

-
-

Sculpture

-
-

Famous Sculptures

-
-

Pictographs

-
-

Petroglyphs

-
-

Figurines

-
-

Fossils

Absent
Absent

Formation

Formation

Websterite can be formed as cumulates in ultramafic intrusions by accumulation of pyroxene crystals at the base of the lava chamber.
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

Amphibole, Augite, Bronzite, Chromite, Diopside, Enstatite, Garnet, Hornblende, Hypersthene, Magnetite, Pyroxene
Iron Oxides, Pyroxene, Quartz, Stishovite, Sulfides

Compound Content

Aluminium Oxide, CaO, Chromium(III) Oxide, Iron(III) Oxide, Potassium Oxide, MgO, Sodium Oxide, Silicon Dioxide, Sulfur Trioxide
Carbon Dioxide, Silicon Dioxide, Sulfur Dioxide, Sulphur

Transformation

Metamorphism

Types of Metamorphism

Burial Metamorphism, Impact Metamorphism
Burial Metamorphism, Cataclastic Metamorphism, Contact Metamorphism

Weathering

Types of Weathering

Biological Weathering, Chemical Weathering, Mechanical Weathering
-

Erosion

Types of Erosion

Chemical Erosion, Coastal Erosion, Glacier Erosion, Water Erosion, Wind Erosion
-

Properties

Physical Properties

Hardness

77
1 7
👆🏻

Grain Size

Coarse Grained
Very fine-grained

Fracture

Uneven
Uneven

Streak

White, Greenish White or Grey
Light to dark brown

Porosity

Less Porous
Less Porous

Luster

Dull to Vitreous to Submetallic
Vitreous

Compressive Strength

95.00 N/mm260.00 N/mm2
0.15 450
👆🏻

Cleavage

-
-

Toughness

-
-

Specific Gravity

3.2-3.52.46-2.86
0 8.4
👆🏻

Transparency

Opaque
Transparent to Translucent

Density

3.1-3.6 g/cm32.7-2.9 g/cm3
0 1400
👆🏻

Thermal Properties

Specific Heat Capacity

0.79 kJ/Kg K0.92 kJ/Kg K
0.14 3.2
👆🏻

Resistance

Impact Resistant, Pressure Resistant, Wear Resistant
Heat Resistant

Reserves

Deposits in Eastern Continents

Asia

India, Russia
South Korea

Africa

South Africa
Western Africa

Europe

Germany, Greece, Italy, Scotland, Turkey
Great Britain, Switzerland

Others

Greenland
-

Deposits in Western Continents

North America

Canada, USA
-

South America

Brazil, Colombia, Venezuela
-

Deposits in Oceania Continent

Australia

New Zealand, Queensland
Central Australia, Western Australia

Websterite vs Pseudotachylite 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 Websterite and Pseudotachylite Reserves. Websterite is ultramafic and ultrabasic rock that consists of roughly equal proportions of orthopyroxene and clinopyroxene. It is a special type of pyroxenite.. Very fine grained fault rock which is composed of glassy matrix that often contains inclusions of wall-rock fragments.. 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 Websterite vs Pseudotachylite information and Websterite vs Pseudotachylite characteristics in the upcoming sections.

Websterite vs Pseudotachylite 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. Websterite vs Pseudotachylite characteristics assist us to distinguish and recognize rocks. Also you can check about Properties of Websterite and Properties of Pseudotachylite. Learn more about Websterite vs Pseudotachylite in the next section. The interior uses of Websterite include Countertops, Decorative aggregates, Entryways, Floor tiles, Flooring and Interior decoration whereas the interior uses of Pseudotachylite include Decorative aggregates, Entryways and Interior decoration. Due to some exceptional properties of Websterite and Pseudotachylite, they have various applications in construction industry. The uses of Websterite in construction industry include As dimension stone, Building houses or walls, Cement manufacture, Construction aggregate, For road aggregate and that of Pseudotachylite include As dimension stone, Cement manufacture, For road aggregate, Making natural cement.

More about Websterite and Pseudotachylite

Here you can know more about Websterite and Pseudotachylite. The life cycle of a rock consists of formation of rock, composition of rock and transformation of rock. The composition of Websterite and Pseudotachylite consists of mineral content and compound content. The mineral content of Websterite includes Amphibole, Augite, Bronzite, Chromite, Diopside, Enstatite, Garnet, Hornblende, Hypersthene, Magnetite, Pyroxene and mineral content of Pseudotachylite includes Iron Oxides, Pyroxene, Quartz, Stishovite, Sulfides. You can also check out the list of all Igneous Rocks. When we have to compare Websterite vs Pseudotachylite, the texture, color and appearance plays an important role in determining the type of rock. Websterite is available in black to grey, bluish - grey, dark greenish - grey, green, light greenish grey colors whereas, Pseudotachylite is available in black, brown, green, grey, pink, white colors. Appearance of Websterite is Layered, Banded, Veined and Shiny and that of Pseudotachylite is Dull and Soft. Properties of rock is another aspect for Websterite vs Pseudotachylite. Hardness of Websterite and Pseudotachylite is 7. The types of Websterite are Ultramafic rock whereas types of Pseudotachylite are Cataclastic rock. Streak of rock is the color of powder produced when it is dragged across an unweathered surface. The streak of Websterite is white, greenish white or grey while that of Pseudotachylite is light to dark brown. The specific heat capacity of Websterite is 0.79 kJ/Kg K and that of Pseudotachylite is 0.92 kJ/Kg K. Depending on the properties like hardness, toughness, specific heat capacity, porosity etc., rocks are resistant to heat, wear, impact, etc.Websterite is impact resistant, pressure resistant, wear resistant whereas Pseudotachylite is heat resistant.