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Adakite and Pumice


Pumice and Adakite


Definition

Definition
Adakite is an intermediate to felsic volcanic rock that has geochemical characteristics of magma which is said to be formed by partial melting of altered basalt that is subducted below volcanic arcs   
Pumice is a volcanic rock that consists of highly vesicular rough textured volcanic glass, which may or may not contain crystals   

History
  
  

Origin
Adak, Aleutian Islands   
Spain   

Discoverer
Defant and Drummond   
Unknown   

Etymology
From Adak, Aleutian Islands   
From Old French pomis, from a Latin dialect variant of pumex   

Class
Igneous Rocks   
Igneous Rocks   

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

Family
  
  

Group
Volcanic   
Volcanic   

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

Texture

Texture
Porphyritic   
Vesicular   

Color
Black, Brown, Light to Dark Grey   
Beige, Colourless, Grey, Light Green, Light Grey, Pink, White, Yellow- grey   

Maintenance
Less   
Less   

Durability
Durable   
Durable   

Water Resistant
No   
Yes   

Scratch Resistant
No   
Yes   

Stain Resistant
No   
Yes   

Wind Resistant
Yes   
No   

Acid Resistant
Yes   
Yes   

Appearance
Dull and Soft   
Vesicular   

Uses

Architecture
  
  

Interior Uses
Decorative Aggregates, Floor Tiles, Homes, Hotels, Kitchens   
Decorative Aggregates, Flooring, Homes, Interior Decoration   

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

Other Architectural Uses
Whetstones   
Curbing, Powder   

Industry
  
  

Construction Industry
As Dimension Stone, Cobblestones, Rail Track Ballast, Roadstone   
As Dimension Stone, Cement Manufacture, for Road Aggregate, In landscaping and horticulture, Making natural cement, Production of lightweight concrete blocks   

Medical Industry
Not Yet Used   
As an abrasive in skin exfoliating products, In Chemical and Pharmaceutical Industry, Medicines and Cosmetics   

Antiquity Uses
Monuments, Sculpture, Small Figurines   
Artifacts   

Other Uses
  
  

Commercial Uses
Commemorative Tablets, Pottery, Used in aquariums   
As a traction material on snow-covered roads, As an abrasive in pencil erasers, Fine abrasive used for polishing, Manufacture of Soap, Solvents, Dyes, Plastics and Fibres, Used in aquariums   

Types

Types
Not Available   
Scoria   

Features
Has High structural resistance against erosion and climate, Host rock for Diamond, Very fine grained rock   
Host Rock for Lead   

Archaeological Significance
  
  

Monuments
Used   
Not Yet Used   

Famous Monuments
Data Not Available   
Not Applicable   

Sculpture
Used   
Not Yet Used   

Famous Sculptures
Data Not Available   
Not Applicable   

Pictographs
Used   
Used   

Petroglyphs
Used   
Used   

Figurines
Used   
Not Yet Used   

Fossils
Absent   
Absent   

Formation

Formation
Adakite rocks are formed when the hydrous fluids are released from minerals that break down in metamorphosed basalt, and rise into the mantle they initiate partial melting.   
Pumice rock forms when the magma cools so quickly that atoms in the melt are not able to arrange themselves into a crystalline structure.   

Composition
  
  

Mineral Content
Olivine, Plagioclase, Pyroxene   
Aluminum Oxides, Calcite, Carbonate, Iron Oxides, Silica   

Compound Content
Aluminium Oxide, MgO, Silicon Dioxide   
Al, Aluminium Oxide, CaO, Carbon Dioxide, MgO, Silicon Dioxide   

Transformation
  
  

Metamorphism
Yes   
Yes   

Types of Metamorphism
Cataclastic Metamorphism, Contact Metamorphism, Impact Metamorphism, Regional Metamorphism   
Burial Metamorphism, Impact Metamorphism   

Weathering
Yes   
Yes   

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

Erosion
Yes   
Yes   

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

Properties

Physical Properties
  
  

Hardness
3-4   
6   

Grain Size
Fine to Medium Grained   
Fine Grained   

Fracture
Conchoidal   
Planar   

Streak
Bluish Black   
White, Greenish White or Grey   

Porosity
Less Porous   
Highly Porous   

Luster
Grainy, Pearly and Vitreous   
Earthy   

Compressive Strength
Not Available   
51.20 N/mm2   
26

Cleavage
Not Available   
Perfect   

Toughness
Not Available   
3   

Specific Gravity
Not Available   
2.86   

Transparency
Opaque   
Opaque   

Density
Not Available   
0.25-0.3 g/cm3   

Thermal Properties
  
  

Specific Heat Capacity
Not Available   
0.87 kJ/Kg K   
14

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

Reserves

Deposits in Eastern Continents
  
  

Asia
India, Russia   
Afghanistan, Indonesia, Japan, Russia   

Africa
Ethiopia, Somalia, South Africa   
Ethiopia, Kenya, Tanzania   

Europe
Iceland   
Greece, Hungary, Iceland, Italy, Turkey   

Others
Not Yet Found   
Not Yet Found   

Deposits in Western Continents
  
  

North America
Canada, USA   
Bahamas, Barbados, Canada, Costa Rica, Cuba, Jamaica, Mexico, USA   

South America
Brazil   
Argentina, Chile, Ecuador, Peru   

Deposits in Oceania Continent
  
  

Australia
Not Yet Found   
New Zealand, Western Australia   

Summary >>
<< Reserves

All about Adakite and Pumice Properties

Know all about Adakite and Pumice properties here. All properties of rocks are important as they define the type of rock and its application. Adakite and Pumice belong to Igneous Rocks.Texture of Adakite is Porphyritic whereas that of Pumice is Vesicular. Adakite appears Dull and Soft and Pumice appears Vesicular. The luster of Adakite is grainy, pearly and vitreous while that of Pumice is earthy. Adakite is available in black, brown, light to dark grey colors whereas Pumice is available in beige, colourless, grey, light green, light grey, pink, white, yellow- grey colors. The commercial uses of Adakite are commemorative tablets, pottery, used in aquariums and that of Pumice are as a traction material on snow-covered roads, as an abrasive in pencil erasers, fine abrasive used for polishing, manufacture of soap, solvents, dyes, plastics and fibres, used in aquariums.

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