Anorthosite

Laterite

Anorthosite and Laterite

Anorthosite

Laterite

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Definition

Anorthosite is a granular igneous rock composed largely of labradorite or plagioclase

Laterite rock is a type of Sedimentary rock which is rich in iron and aluminium, formed in hot and wet tropical areas

History

Origin

India

Discoverer

Unknown

Francis Buchanan-Hamilton

Etymology

From French anorthose plagioclase + -ite1

From Latin later brick, tile + -ite1

Class

Igneous Rocks

Sedimentary Rocks

Sub-Class

Durable Rock, Medium Hardness Rock

Durable Rock, Soft Rock

Family

Group

Plutonic

Other Categories

Coarse Grained Rock, Opaque Rock

Fine Grained Rock, Opaque Rock

Texture

Foliated, Glassy

Earthy, Massive, Porphyritic

Color

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

Brown, Buff, Red

Maintenance

Less

Durability

Durable

Water Resistant

✔ ✘

Scratch Resistant

✔ ✘

Stain Resistant

✔ ✘

Wind Resistant

✔ ✘

Acid Resistant

✔ ✘

Appearance

Layered, Banded, Veined and Shiny

Rough and Banded

Uses

Architecture

Interior Uses

Decorative Aggregates, Floor Tiles, Homes, Interior Decoration

Decorative Aggregates, Flooring, 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

Cobblestones, for Road Aggregate, Landscaping, Roadstone

Medical Industry

Antiquity Uses

Artifacts, Sculpture, Small Figurines

Artifacts, Monuments, Sculpture

Other Uses

Commercial Uses

Creating Artwork, Curling

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

Types

Proterozoic Anorthosite and Archean Anorthosite

Laterite

Features

Generally rough to touch, Is one of the oldest rock

Is one of the oldest rock, Very fine grained rock

Archaeological Significance

Monuments

Famous Monuments

Sculpture

Famous Sculptures

Pictographs

Petroglyphs

Figurines

Fossils

Absent

Present

Formation

Anorthosite is a phaneritic, intrusive igneous rock which is characterized by a predominance of plagioclase feldspar which is almost 90–100%, and a minimal mafic component.

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

Composition

Mineral Content

Amphibole, Clinopyroxene, Ilmenite, Magnetite, Olivine, Orthopyroxene

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

Compound Content

Ca, CaO, Chromium(III) Oxide, MgO, Sulfur Trioxide

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

Transformation

Metamorphism

✔ ✘

Types of Metamorphism

Cataclastic Metamorphism, Contact Metamorphism

Weathering

✔ ✘

Types of Weathering

Biological Weathering

Biological Weathering, Chemical Weathering

Erosion

✔ ✘

Types of Erosion

Chemical Erosion, Wind Erosion

Chemical Erosion, Water Erosion, Wind Erosion

Properties

Physical Properties

Hardness

5-62

1 7

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Grain Size

Coarse Grained

Fine Grained

Fracture

Irregular

Conchoidal

Streak

White

Porosity

Less Porous

Highly Porous

Luster

Pearly to Subvitreous

Dull

Compressive Strength

180.00 N/mm²5.00 N/mm²

0.15 450

👆🏻

Cleavage

Toughness

Specific Gravity

2.62-2.82-9999

0 8.4

👆🏻

Transparency

Translucent

Opaque

Density

2.7-4 g/cm³-9999 g/cm³

0 1400

👆🏻

Thermal Properties

Specific Heat Capacity

0.84 kJ/Kg K0.92 kJ/Kg K

0.14 3.2

👆🏻

Resistance

Heat Resistant, Impact Resistant, Pressure Resistant, Scratch Resistant, Wear Resistant

Heat Resistant, Pressure Resistant

Reserves

Deposits in Eastern Continents

Asia

India

Africa

East Africa, Western Africa

Europe

Bulgaria, France, Germany, Greece, Hungary, Italy, Latvia, Lithuania, Malta, Poland, Portugal, Romania, Slovenia, Spain, Sweden, The Czech Republic

England, Romania, Scotland

Others

Deposits in Western Continents

North America

Canada

Canada, USA

South America

Bolivia, Colombia

Deposits in Oceania Continent

Australia

Central Australia, South Australia, Western Australia

Central Australia, Western Australia

All about Anorthosite and Laterite Properties

Know all about Anorthosite and Laterite properties here. All properties of rocks are important as they define the type of rock and its application. Anorthosite belongs to Igneous Rocks while Laterite belongs to Sedimentary Rocks.Texture of Anorthosite is Foliated, Glassy whereas that of Laterite is Earthy, Massive, Porphyritic. Anorthosite appears Layered, Banded, Veined and Shiny and Laterite appears Rough and Banded. The luster of Anorthosite is pearly to subvitreous while that of Laterite is dull. Anorthosite is available in black, bluish - grey, brown, green, grey, light greenish grey, pink, white colors whereas Laterite is available in brown, buff, red colors. The commercial uses of Anorthosite are creating artwork, curling and that of Laterite are an oil and gas reservoir, source of bauxite, used in aquariums.