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Shoshonite and Trachyte


Trachyte and Shoshonite


Definition

Definition
Shoshonite is a basaltic rock, properly a potassic trachyandesite, composed of olivine, augite and plagioclase phenocrysts in a groundmass with calcic plagioclase and sanidine and some dark-colored volcanic glass  
Trachyte is a grey fine-grained volcanic rock which mainly consists of alkali feldspar  

History
  
  

Origin
Wyoming,USA  
-  

Discoverer
Iddings  
Alexandre Brongniart and René Just Haüy  

Etymology
From the place of origin called Shoshone riverin Wyoming  
From Greek trakhus rough’ or trakhutēs roughness  

Class
Igneous Rocks  
Igneous Rocks  

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

Family
  
  

Group
Volcanic  
Volcanic  

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

Texture

Texture
Porphyritic  
Aphanitic to Porphyritic  

Color
Brown- Black, Dark Brown  
Black, Brown, Dark Greenish - Grey, Green, Grey, Light to Dark Grey, White  

Maintenance
Less  
Less  

Durability
Durable  
Durable  

Water Resistant
Yes  
Yes  

Scratch Resistant
Yes  
Yes  

Stain Resistant
Yes  
Yes  

Wind Resistant
Yes  
Yes  

Acid Resistant
Yes  
No  

Appearance
Dull  
Banded  

Uses

Architecture
  
  

Interior Uses
Decorative Aggregates, Homes, Interior Decoration  
Decorative Aggregates, Flooring, Homes, Interior Decoration  

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

Other Architectural Uses
Curbing  
Curbing  

Industry
  
  

Construction Industry
As Dimension Stone, Cobblestones, Rail Track Ballast, Roadstone  
As Dimension Stone, Building houses or walls, Cement Manufacture, Construction Aggregate, for Road Aggregate, Landscaping, Making natural cement, Manufacture of Magnesium and Dolomite Refractories  

Medical Industry
-  
-  

Antiquity Uses
Sculpture  
Artifacts, Monuments, Sculpture, Small Figurines  

Other Uses
  
  

Commercial Uses
Cemetery Markers, Creating Artwork  
Cemetery Markers, Creating Artwork  

Types

Types
Intermediate volcanic rock  
Felsic volcanic rock  

Features
Has High structural resistance against erosion and climate, Very fine grained rock  
Available in Lots of Colors and Patterns, Is one of the oldest rock, Matrix variable  

Archaeological Significance
  
  

Monuments
-  
-  

Famous Monuments
-  
-  

Sculpture
-  
-  

Famous Sculptures
-  
-  

Pictographs
-  
-  

Petroglyphs
-  
-  

Figurines
-  
-  

Fossils
Absent  
Absent  

Formation

Formation
Shoshonite 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.  
Trachyte is an igneous volcanic rock with an aphanitic to porphyritic texture. It is the volcanic equivalent of syenite rock and forms as a result of magmatic differentiation.  

Composition
  
  

Mineral Content
Pyroxene  
Augite, Biotite, Feldspar, Hornblade, Plagioclase, Quartz  

Compound Content
Aluminium Oxide, Iron(III) Oxide, Potassium Oxide, Sodium Oxide, Titanium Dioxide  
Potassium Oxide, Sodium Oxide, Silicon Dioxide  

Transformation
  
  

Metamorphism
Yes  
Yes  

Types of Metamorphism
Burial Metamorphism, Cataclastic Metamorphism, Contact Metamorphism  
Cataclastic Metamorphism, Contact 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, Glacier Erosion  
Chemical Erosion, Coastal Erosion, Glacier Erosion, Sea Erosion, Water Erosion, Wind Erosion  

Properties

Physical Properties
  
  

Hardness
6  
6  

Grain Size
Medium to Fine Coarse Grained  
Fine Grained  

Fracture
Uneven  
-  

Streak
White to Grey  
White  

Porosity
Less Porous  
Less Porous  

Luster
Dull  
Metallic  

Compressive Strength
175.00 N/mm2  
20
150.00 N/mm2  
22

Cleavage
-  
-  

Toughness
1.6  
-  

Specific Gravity
2.98  
2.7  

Transparency
Opaque  
Opaque  

Density
2.9-3 g/cm3  
2.43-2.45 g/cm3  

Thermal Properties
  
  

Specific Heat Capacity
0.79 kJ/Kg K  
17
0.84 kJ/Kg K  
15

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

Reserves

Deposits in Eastern Continents
  
  

Asia
India, Russia  
China, India, Iran, Saudi Arabia, Sri Lanka, Taiwan, Thailand, Turkey, Vietnam  

Africa
South Africa  
Angola, Egypt, Madagascar, Namibia, Nigeria, South Africa  

Europe
Iceland  
Bulgaria, England, Germany, Norway, Romania, Switzerland  

Others
-  
-  

Deposits in Western Continents
  
  

North America
Canada, USA  
USA  

South America
Brazil  
Brazil, Chile  

Deposits in Oceania Continent
  
  

Australia
-  
New Zealand, Queensland, South Australia, Western Australia  

Summary >>
<< Reserves

All about Shoshonite and Trachyte Properties

Know all about Shoshonite and Trachyte properties here. All properties of rocks are important as they define the type of rock and its application. Shoshonite and Trachyte belong to Igneous Rocks.Texture of Shoshonite is Porphyritic whereas that of Trachyte is Aphanitic to Porphyritic. Shoshonite appears Dull and Trachyte appears Banded. The luster of Shoshonite is dull while that of Trachyte is metallic. Shoshonite is available in brown- black, dark brown colors whereas Trachyte is available in black, brown, dark greenish - grey, green, grey, light to dark grey, white colors. The commercial uses of Shoshonite and Trachyte are cemetery markers, creating artwork.

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