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Schist and Lherzolite


Lherzolite and Schist


Definition

Definition
Schist is a medium grade metamorphic rock with medium to large, flat, sheet like grains in a preferred orientation   
Lherzolite is a type of ultramafic igneous rock which contains essential olivine and clinopyroxene and orthopyroxene in equal proportions   

History
  
  

Origin
Unknown   
France   

Discoverer
Unknown   
Unknown   

Etymology
From French schiste, Greek skhistos i.e. split   
From the Lherz Massif, an alpine peridotite complex, at Étang de Lers, near Massat in the French Pyrenees; Lherz is the archaic spelling of this location   

Class
Metamorphic Rocks   
Igneous Rocks   

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

Family
  
  

Group
Not Applicable   
Plutonic   

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

Texture

Texture
Foliated, Platy   
Grenue   

Color
Black, Blue, Brown, Dark Brown, Green, Grey, Silver   
Black, Dark Greenish - Grey, Green, Pink, Purple   

Maintenance
Less   
Less   

Durability
Durable   
Durable   

Water Resistant
Yes   
No   

Scratch Resistant
No   
Yes   

Stain Resistant
No   
Yes   

Wind Resistant
No   
No   

Acid Resistant
No   
Yes   

Appearance
Layered and Shiny   
Glassy, Vesicular and Foilated   

Uses

Architecture
  
  

Interior Uses
Decorative Aggregates, Floor Tiles, Interior Decoration   
Decorative Aggregates, Entryways, Homes, Interior Decoration   

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

Other Architectural Uses
Not Yet Used   
Curbing   

Industry
  
  

Construction Industry
As Dimension Stone, Building houses or walls, Cement Manufacture, for Road Aggregate, Roadstone   
Landscaping, Manufacture of Magnesium and Dolomite Refractories, Used for flooring, stair treads, borders and window sills.   

Medical Industry
Not Yet Used   
Not Yet Used   

Antiquity Uses
Artifacts   
Artifacts, Sculpture   

Other Uses
  
  

Commercial Uses
Used in aquariums, Writing Slates   
As armour rock for sea walls, Source of Magnesia (MgO), Used in aquariums   

Types

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

Features
Easily splits into thin plates, Smooth to touch   
Host Rock for Lead   

Archaeological Significance
  
  

Monuments
Not Yet Used   
Not Yet Used   

Famous Monuments
Not Applicable   
Not Applicable   

Sculpture
Not Yet Used   
Used   

Famous Sculptures
Not Applicable   
Data Not Available   

Pictographs
Used   
Not Used   

Petroglyphs
Used   
Not Used   

Figurines
Not Yet Used   
Used   

Fossils
Absent   
Absent   

Formation

Formation
Schist formed by dynamic metamorphism at high temperatures and pressures that aligns the grains of mica, hornblende and other elongated minerals into thin layers.   
Lherzolite is a fine-grained, hard rock which is a type of metasomatite, essentially altered basalt. It forms with or without crystallization, either below the surface as intrusive rocks or on the surface as extrusive rocks.   

Composition
  
  

Mineral Content
Alusite, Amphibole, Biotite, Chlorite, Epidote, Feldspar, Garnet, Graphite, Hornblade, Kyanite, Micas, Muscovite or Illite, Porphyroblasts, Quartz, Sillimanite, Staurolite, Talc   
Harzburgite, Olivine, Pyroxene, Pyrrhotite   

Compound Content
CaO, Carbon Dioxide, MgO   
CaO, Cr, Chromium(III) Oxide, MgO   

Transformation
  
  

Metamorphism
No   
Yes   

Types of Metamorphism
Not Applicable   
Cataclastic Metamorphism, Contact Metamorphism   

Weathering
Yes   
Yes   

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

Erosion
Yes   
Yes   

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

Properties

Physical Properties
  
  

Hardness
3.5-4   
6.5   

Grain Size
Medium to Fine Coarse Grained   
Fine Grained   

Fracture
Conchoidal   
Conchoidal   

Streak
White   
White   

Porosity
Highly Porous   
Less Porous   

Luster
Shiny   
Subvitreous to Dull   

Compressive Strength
Not Available   
290.00 N/mm2   
3

Cleavage
Slaty   
Perfect   

Toughness
1.5   
2.7   

Specific Gravity
2.5-2.9   
2.86   

Transparency
Opaque   
Opaque   

Density
2.8-2.9 g/cm3   
2.8-2.9 g/cm3   

Thermal Properties
  
  

Specific Heat Capacity
Not Available   
0.95 kJ/Kg K   
9

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

Reserves

Deposits in Eastern Continents
  
  

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

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

Europe
Austria, England, France, Georgia, Germany, Italy, Liechtenstein, Monaco, Norway, Slovenia, Spain, Sweden, Switzerland   
United Kingdom   

Others
Not Yet Found   
Not Yet Found   

Deposits in Western Continents
  
  

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

South America
Brazil, Colombia, Guyana   
Not Yet Found   

Deposits in Oceania Continent
  
  

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

Summary >>
<< Reserves

All about Schist and Lherzolite Properties

Know all about Schist and Lherzolite properties here. All properties of rocks are important as they define the type of rock and its application. Schist belongs to Metamorphic Rocks while Lherzolite belongs to Igneous Rocks.Texture of Schist is Foliated, Platy whereas that of Lherzolite is Grenue. Schist appears Layered and Shiny and Lherzolite appears Glassy, Vesicular and Foilated. The luster of Schist is shiny while that of Lherzolite is subvitreous to dull. Schist is available in black, blue, brown, dark brown, green, grey, silver colors whereas Lherzolite is available in black, dark greenish - grey, green, pink, purple colors. The commercial uses of Schist are used in aquariums, writing slates and that of Lherzolite are as armour rock for sea walls, source of magnesia (mgo), used in aquariums.

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