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Gritstone and Tachylite


Tachylite and Gritstone


Definition

Definition
Gritstone or grit is a hard, coarse-grained, siliceous sandstone   
Tachylite is a vitreous form of basaltic volcanic glass. This glass is formed naturally by the rapid cooling of molten basalt   

History
  
  

Origin
Pennines, England   
Iceland   

Discoverer
J.J. Ferber   
Unknown   

Etymology
From Grit + Stone   
From German Tachylite, from tachy- + Greek lutos soluble, melting   

Class
Sedimentary Rocks   
Igneous Rocks   

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

Family
  
  

Group
Not Applicable   
Volcanic   

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

Texture

Texture
Earthy   
Vitreous   

Color
Beige, Black, Brown, Colourless, Cream, Dark Brown, Green, Grey, Light Green, Light to Dark Grey, Pink, Red, White, Yellow   
Black, Dark Brown   

Maintenance
Less   
More   

Durability
Durable   
Durable   

Water Resistant
Yes   
Yes   

Scratch Resistant
Yes   
No   

Stain Resistant
Yes   
No   

Wind Resistant
Yes   
Yes   

Acid Resistant
No   
Yes   

Appearance
Layered and Foliated   
Glassy   

Uses

Architecture
  
  

Interior Uses
Countertops, Decorative Aggregates, Homes, Interior Decoration   
Decorative Aggregates, Interior Decoration   

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

Other Architectural Uses
Curbing   
Curbing   

Industry
  
  

Construction Industry
Construction Aggregate, Roadstone   
Cutting Tool, Knives, Landscaping, Scrapers   

Medical Industry
Not Yet Used   
Not Yet Used   

Antiquity Uses
Artifacts, Monuments, Sculpture   
Artifacts   

Other Uses
  
  

Commercial Uses
An Oil and Gas Reservoir, As a Feed Additive for Livestock, Gemstone, Metallurgical Flux, Production of Lime, Soil Conditioner, Source of Magnesia (MgO), Tombstones   
Cemetery Markers, Creating Artwork   

Types

Types
Not Available   
Not Available   

Features
Available in Lots of Colors and Patterns, Generally rough to touch, Very fine grained rock   
Available in Lots of Colors and Patterns, Clasts are smooth to touch, NA   

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
Not Used   
Used   

Petroglyphs
Not Used   
Used   

Figurines
Used   
Not Yet Used   

Fossils
Present   
Absent   

Formation

Formation
Gritstone is a type of sedimentary rock which was formed on the floors of wide river deltas where the grit deposits were laid down, with every tide or flood dumping another layer of sediment.   
Tachylite 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
Calcite, Clay Minerals, Feldspar, Micas, Quartz   
Feldspar, Olivine   

Compound Content
Aluminium Oxide, CaO, Iron(III) Oxide, Potassium Oxide, MgO, Sodium Oxide, Silicon Dioxide   
Fe, Mg   

Transformation
  
  

Metamorphism
No   
Yes   

Types of Metamorphism
Not Applicable   
Burial Metamorphism, Cataclastic 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, Mechanical Weathering   

Erosion
Yes   
Yes   

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

Properties

Physical Properties
  
  

Hardness
6-7   
5.5   

Grain Size
Coarse Grained   
Medium to Fine Coarse Grained   

Fracture
Conchoidal   
Conchoidal   

Streak
White   
Vermilion   

Porosity
Highly Porous   
Less Porous   

Luster
Dull   
Resinous   

Compressive Strength
70.00 N/mm2   
24
206.00 N/mm2   
8

Cleavage
Perfect   
Not Available   

Toughness
Not Available   
Not Available   

Specific Gravity
2.250   
2.4   

Transparency
Opaque   
Opaque   

Density
2.2 g/cm3   
3.058 g/cm3   

Thermal Properties
  
  

Specific Heat Capacity
0.92 kJ/Kg K   
10
0.56 kJ/Kg K   
22

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

Reserves

Deposits in Eastern Continents
  
  

Asia
China, India, Kazakhstan, Mongolia, Russia, Uzbekistan   
Cambodia, Russia, South Korea   

Africa
Namibia, Nigeria, South Africa   
East Africa   

Europe
Austria, Denmark, Germany, Great Britain, Netherlands, Poland, Sweden, Switzerland, United Kingdom   
England, Germany, Hungary, Iceland, Scotland, Sweden   

Others
Greenland   
Hawaii Islands   

Deposits in Western Continents
  
  

North America
Canada, USA   
USA   

South America
Brazil   
Not Yet Found   

Deposits in Oceania Continent
  
  

Australia
New South Wales, New Zealand, Western Australia   
Victoria   

Summary >>
<< Reserves

All about Gritstone and Tachylite Properties

Know all about Gritstone and Tachylite properties here. All properties of rocks are important as they define the type of rock and its application. Gritstone belongs to Sedimentary Rocks while Tachylite belongs to Igneous Rocks.Texture of Gritstone is Earthy whereas that of Tachylite is Vitreous. Gritstone appears Layered and Foliated and Tachylite appears Glassy. The luster of Gritstone is dull while that of Tachylite is resinous. Gritstone and Tachylite are available in beige, black, brown, colourless, cream, dark brown, green, grey, light green, light to dark grey, pink, red, white, yellow colors. The commercial uses of Gritstone are an oil and gas reservoir, as a feed additive for livestock, gemstone, metallurgical flux, production of lime, soil conditioner, source of magnesia (mgo), tombstones and that of Tachylite are cemetery markers, creating artwork.

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