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Laterite and Schist


Schist and Laterite


Definition

Definition
Laterite rock is a type of Sedimentary rock which is rich in iron and aluminium, formed in hot and wet tropical areas  
Schist is a medium grade metamorphic rock with medium to large, flat, sheet like grains in a preferred orientation  

History
  
  

Origin
India  
-  

Discoverer
Francis Buchanan-Hamilton  
Unknown  

Etymology
From Latin later brick, tile + -ite1  
From French schiste, Greek skhistos i.e. split  

Class
Sedimentary Rocks  
Metamorphic Rocks  

Sub-Class
Durable Rock, Soft Rock  
Durable Rock, Medium Hardness Rock  

Family
  
  

Group
-  
-  

Other Categories
Fine Grained Rock, Opaque Rock  
Coarse Grained Rock, Fine Grained Rock, Medium Grained Rock, Opaque Rock  

Texture

Texture
Earthy, Massive, Porphyritic  
Foliated, Platy  

Color
Brown, Buff, Red  
Black, Blue, Brown, Dark Brown, Green, Grey, Silver  

Maintenance
Less  
Less  

Durability
Durable  
Durable  

Water Resistant
No  
Yes  

Scratch Resistant
No  
No  

Stain Resistant
No  
No  

Wind Resistant
No  
No  

Acid Resistant
No  
No  

Appearance
Rough and Banded  
Layered and Shiny  

Uses

Architecture
  
  

Interior Uses
Decorative Aggregates, Flooring, Interior Decoration  
Decorative Aggregates, Floor Tiles, Interior Decoration  

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

Other Architectural Uses
Curbing  
-  

Industry
  
  

Construction Industry
Cobblestones, for Road Aggregate, Landscaping, Roadstone  
As Dimension Stone, Building houses or walls, Cement Manufacture, for Road Aggregate, Roadstone  

Medical Industry
-  
-  

Antiquity Uses
Artifacts, Monuments, Sculpture  
Artifacts  

Other Uses
  
  

Commercial Uses
An Oil and Gas Reservoir, Source of bauxite, Used in aquariums  
Used in aquariums, Writing Slates  

Types

Types
Laterite  
Mica Schists, Calc-Silicate Schists, Graphite Schists, Blueschists, Whiteschists, Greenschists, Hornblende Schist, Talc Schist, Chlorite Schist, Garnet Schist, Glaucophane schist.  

Features
Is one of the oldest rock, Very fine grained rock  
Easily splits into thin plates, Smooth to touch  

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.   
Schist formed by dynamic metamorphism at high temperatures and pressures that aligns the grains of mica, hornblende and other elongated minerals into thin layers.  

Composition
  
  

Mineral Content
Aluminum Oxides, Biotite, Hematite, Hornblade, Iron Oxides, Manganese Oxides, Micas, Muscovite or Illite, Plagioclase, Pyroxene  
Alusite, Amphibole, Biotite, Chlorite, Epidote, Feldspar, Garnet, Graphite, Hornblade, Kyanite, Micas, Muscovite or Illite, Porphyroblasts, Quartz, Sillimanite, Staurolite, Talc  

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

Transformation
  
  

Metamorphism
No  
No  

Types of Metamorphism
-  
-  

Weathering
Yes  
Yes  

Types of Weathering
Biological Weathering, Chemical Weathering  
Biological Weathering, Chemical Weathering, Mechanical Weathering  

Erosion
Yes  
Yes  

Types of Erosion
Chemical Erosion, Water Erosion, Wind Erosion  
Chemical Erosion, Coastal Erosion, Glacier Erosion  

Properties

Physical Properties
  
  

Hardness
2  
3.5-4  

Grain Size
Fine Grained  
Medium to Fine Coarse Grained  

Fracture
Conchoidal  
Conchoidal  

Streak
White  
White  

Porosity
Highly Porous  
Highly Porous  

Luster
Dull  
Shiny  

Compressive Strength
5.00 N/mm2  
99+
150.00 N/mm2  
22

Cleavage
-  
Slaty  

Toughness
-  
1.5  

Specific Gravity
-9999  
2.5-2.9  

Transparency
Opaque  
Opaque  

Density
-9999 g/cm3  
2.8-2.9 g/cm3  

Thermal Properties
  
  

Specific Heat Capacity
0.92 kJ/Kg K  
10
0.70 kJ/Kg K  
24

Resistance
Heat Resistant, Pressure Resistant  
Impact Resistant, Pressure Resistant, Water Resistant  

Reserves

Deposits in Eastern Continents
  
  

Asia
India  
Afghanistan, Bangladesh, Bhutan, China, India, Japan, Kazakhstan, Malaysia, Pakistan, Russia, Thailand, Turkey, Vietnam  

Africa
East Africa, Western Africa  
Egypt, Ethiopia, Morocco, Nigeria, South Africa  

Europe
England, Romania, Scotland  
Austria, England, France, Georgia, Germany, Italy, Liechtenstein, Monaco, Norway, Slovenia, Spain, Sweden, Switzerland  

Others
-  
-  

Deposits in Western Continents
  
  

North America
Canada, USA  
Canada, Costa Rica, Cuba, Mexico, Panama, USA  

South America
-  
Brazil, Colombia, Guyana  

Deposits in Oceania Continent
  
  

Australia
Central Australia, Western Australia  
New South Wales, New Zealand, Queensland  

Summary >>
<< Reserves

All about Laterite and Schist Properties

Know all about Laterite and Schist properties here. All properties of rocks are important as they define the type of rock and its application. Laterite belongs to Sedimentary Rocks while Schist belongs to Metamorphic Rocks.Texture of Laterite is Earthy, Massive, Porphyritic whereas that of Schist is Foliated, Platy. Laterite appears Rough and Banded and Schist appears Layered and Shiny. The luster of Laterite is dull while that of Schist is shiny. Laterite is available in brown, buff, red colors whereas Schist is available in black, blue, brown, dark brown, green, grey, silver colors. The commercial uses of Laterite are an oil and gas reservoir, source of bauxite, used in aquariums and that of Schist are used in aquariums, writing slates.

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