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Whiteschist and Ignimbrite


Ignimbrite and Whiteschist


Definition

Definition
Whiteschist is an uncommon rock type belonging to a class of metamorphic rock, this is formed at high-ultra-high pressures   
Ignimbrite is a volcanic rock consisting mainly of pumice fragments, formed by the consolidation of material deposited by pyroclastic flows   

History
  
  

Origin
Tasmania   
New Zealand   

Discoverer
Unknown   
Patrick Marshall   

Etymology
From French schiste, Greek skhistos i.e. split   
From Latin ignis fire + imber, imbr- shower of rain, storm cloud + -ite   

Class
Metamorphic Rocks   
Igneous Rocks   

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

Family
  
  

Group
Not Applicable   
Volcanic   

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

Texture

Texture
Foliated   
Aphanitic   

Color
Colourless, Green, Grey, White   
Beige, Black, Brown, Grey, Pink, White   

Maintenance
Less   
More   

Durability
Durable   
Durable   

Water Resistant
No   
Yes   

Scratch Resistant
Yes   
Yes   

Stain Resistant
Yes   
No   

Wind Resistant
No   
Yes   

Acid Resistant
No   
No   

Appearance
Banded and Foilated   
Dull, Vesicular and Foilated   

Uses

Architecture
  
  

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

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

Other Architectural Uses
Curbing   
Curbing   

Industry
  
  

Construction Industry
for Road Aggregate   
Building houses or walls, Construction Aggregate   

Medical Industry
Not Yet Used   
Not Yet Used   

Antiquity Uses
Artifacts, Monuments, Sculpture, Small Figurines   
Artifacts, Monuments, Sculpture, Small Figurines   

Other Uses
  
  

Commercial Uses
Creating Artwork, Gemstone, Jewelry, Production of Lime   
Cemetery Markers, Commemorative Tablets, Creating Artwork   

Types

Types
Not Available   
Not Available   

Features
High percentage of mica, Host Rock for Lead   
Always found as volcanic pipes over deep continental crust   

Archaeological Significance
  
  

Monuments
Used   
Used   

Famous Monuments
Data Not Available   
Data Not Available   

Sculpture
Used   
Used   

Famous Sculptures
Data Not Available   
Data Not Available   

Pictographs
Used   
Used   

Petroglyphs
Used   
Used   

Figurines
Used   
Used   

Fossils
Absent   
Absent   

Formation

Formation
Whiteschist is formed by dynamic metamorphism at high temperatures and pressures that aligns the grains of mica, hornblende and other elongated minerals into thin layers.   
Ignimbrites are formed from very poorly sorted mixture of volcanic ash or tuff and pumice lapilli, commonly with scattered lithic fragments.   

Composition
  
  

Mineral Content
Carbonate, Coesite, Quartz, Silica   
Apatite, Biotite, Calcite, Chlorite, Feldspar, Hematite, Hornblade, Ilmenite, Magnetite, Olivine, Pyroxene, Quartz   

Compound Content
CaO, Mg, MgO, Silicon Dioxide   
Ca, NaCl   

Transformation
  
  

Metamorphism
No   
Yes   

Types of Metamorphism
Not Applicable   
Burial Metamorphism, Contact Metamorphism, Hydrothermal Metamorphism, Impact Metamorphism, Regional Metamorphism   

Weathering
Yes   
Yes   

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

Erosion
Yes   
Yes   

Types of Erosion
Chemical Erosion, Coastal Erosion, Glacier Erosion   
Chemical Erosion, Coastal Erosion   

Properties

Physical Properties
  
  

Hardness
1.5   
4-6   

Grain Size
Fine to Medium Grained   
Fine Grained   

Fracture
Conchoidal   
Uneven   

Streak
White   
White   

Porosity
Less Porous   
Highly Porous   

Luster
Subvitreous to Dull   
Vitreous to Dull   

Compressive Strength
200.00 N/mm2   
10
243.80 N/mm2   
5

Cleavage
Perfect   
Not Available   

Toughness
1   
Not Available   

Specific Gravity
2.86   
2.73   

Transparency
Opaque   
Opaque   

Density
2.8-2.9 g/cm3   
1-1.8 g/cm3   

Thermal Properties
  
  

Specific Heat Capacity
0.92 kJ/Kg K   
10
0.20 kJ/Kg K   
25

Resistance
Heat 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   
Afghanistan, Armenia, Azerbaijan, Burma, Cambodia, China, India, Indonesia, Iran, Japan, Malaysia, Mongolia, Nepal, North Korea, Pakistan, Saudi Arabia, Syria, Taiwan, Thailand, Turkey, Vietnam, Yemen   

Africa
Egypt, Ethiopia, Morocco, Nigeria, South Africa   
Cameroon, Cape Verde, Chad, Djibouti, Eritrea, Ethiopia, Kenya, Libya, Madagascar, Nigeria, Rwanda, South Africa, Sudan, Tanzania, Uganda   

Europe
Austria, England, France, Georgia, Germany, Italy, Liechtenstein, Monaco, Norway, Slovenia, Spain, Sweden, Switzerland   
France, Georgia, Germany, Greece, Iceland, Italy, Netherlands, Poland, Portugal, Spain, United Kingdom   

Others
Not Yet Found   
Antarctica, Hawaii Islands   

Deposits in Western Continents
  
  

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

South America
Brazil, Colombia, Guyana   
Argentina, Bolivia, Brazil, Chile, Colombia, Ecuador   

Deposits in Oceania Continent
  
  

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

Summary >>
<< Reserves

All about Whiteschist and Ignimbrite Properties

Know all about Whiteschist and Ignimbrite properties here. All properties of rocks are important as they define the type of rock and its application. Whiteschist belongs to Metamorphic Rocks while Ignimbrite belongs to Igneous Rocks.Texture of Whiteschist is Foliated whereas that of Ignimbrite is Aphanitic. Whiteschist appears Banded and Foilated and Ignimbrite appears Dull, Vesicular and Foilated. The luster of Whiteschist is subvitreous to dull while that of Ignimbrite is vitreous to dull. Whiteschist is available in colourless, green, grey, white colors whereas Ignimbrite is available in beige, black, brown, grey, pink, white colors. The commercial uses of Whiteschist are creating artwork, gemstone, jewelry, production of lime and that of Ignimbrite are cemetery markers, commemorative tablets, creating artwork.

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