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Laterite
Laterite

Pseudotachylite
Pseudotachylite



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Pseudotachylite

Laterite and Pseudotachylite

Definition

Definition

Laterite rock is a type of Sedimentary rock which is rich in iron and aluminium, formed in hot and wet tropical areas
Very fine grained fault rock which is composed of glassy matrix that often contains inclusions of wall-rock fragments.

History

Origin

India
USA

Discoverer

Francis Buchanan-Hamilton
Unknown

Etymology

From Latin later brick, tile + -ite1
From pseudo- +‎ tachylite, a glassy rock generated by frictional heat within faults.

Class

Sedimentary Rocks
Metamorphic Rocks

Sub-Class

Durable Rock, Soft Rock
Durable Rock, Hard Rock

Family

Group

-
-

Other Categories

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

Texture

Texture

Earthy, Massive, Porphyritic
Quench

Color

Brown, Buff, Red
Black, Brown, Green, Grey, Pink, White

Maintenance

Less
Less

Durability

Durable
Durable

Water Resistant

Scratch Resistant

Stain Resistant

Wind Resistant

Acid Resistant

Appearance

Rough and Banded
Dull and Soft

Uses

Architecture

Interior Uses

Decorative Aggregates, Flooring, Interior Decoration
Decorative Aggregates, Entryways, Interior Decoration

Exterior Uses

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

Other Architectural Uses

Curbing
Curbing

Industry

Construction Industry

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

Medical Industry

-
-

Antiquity Uses

Artifacts, Monuments, Sculpture
Artifacts, Monuments

Other Uses

Commercial Uses

An Oil and Gas Reservoir, Source of bauxite, Used in aquariums
Creating Artwork, Gemstone

Types

Types

Laterite
Cataclastic rock

Features

Is one of the oldest rock, Very fine grained rock
Host Rock for Lead

Archaeological Significance

Monuments

-
-

Famous Monuments

-
-

Sculpture

-
-

Famous Sculptures

-
-

Pictographs

-
-

Petroglyphs

-
-

Figurines

-
-

Fossils

Present
Absent

Formation

Formation

Laterite is a type of sedimentary rock which is generally a reddish weathering product of basalt.
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

Aluminum Oxides, Biotite, Hematite, Hornblade, Iron Oxides, Manganese Oxides, Micas, Muscovite or Illite, Plagioclase, Pyroxene
Iron Oxides, Pyroxene, Quartz, Stishovite, Sulfides

Compound Content

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

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

27
1 7
👆🏻

Grain Size

Fine Grained
Very fine-grained

Fracture

Conchoidal
Uneven

Streak

White
Light to dark brown

Porosity

Highly Porous
Less Porous

Luster

Dull
Vitreous

Compressive Strength

5.00 N/mm260.00 N/mm2
0.15 450
👆🏻

Cleavage

-
-

Toughness

-
-

Specific Gravity

-99992.46-2.86
0 8.4
👆🏻

Transparency

Opaque
Transparent to Translucent

Density

-9999 g/cm32.7-2.9 g/cm3
0 1400
👆🏻

Thermal Properties

Specific Heat Capacity

0.92 kJ/Kg K0.92 kJ/Kg K
0.14 3.2
👆🏻

Resistance

Heat Resistant, Pressure Resistant
Heat Resistant

Reserves

Deposits in Eastern Continents

Asia

India
South Korea

Africa

East Africa, Western Africa
Western Africa

Europe

England, Romania, Scotland
Great Britain, Switzerland

Others

-
-

Deposits in Western Continents

North America

Canada, USA
-

South America

-
-

Deposits in Oceania Continent

Australia

Central Australia, Western Australia
Central Australia, Western Australia

All about Laterite and Pseudotachylite Properties

Know all about Laterite and Pseudotachylite properties here. All properties of rocks are important as they define the type of rock and its application. Laterite belongs to Sedimentary Rocks while Pseudotachylite belongs to Metamorphic Rocks.Texture of Laterite is Earthy, Massive, Porphyritic whereas that of Pseudotachylite is Quench. Laterite appears Rough and Banded and Pseudotachylite appears Dull and Soft. The luster of Laterite is dull while that of Pseudotachylite is vitreous. Laterite is available in brown, buff, red colors whereas Pseudotachylite is available in black, brown, green, grey, pink, white colors. The commercial uses of Laterite are an oil and gas reservoir, source of bauxite, used in aquariums and that of Pseudotachylite are creating artwork, gemstone.