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Andesite
Andesite

Syenite
Syenite



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Andesite
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Syenite

Andesite and Syenite

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1 Definition
1.1 Definition
Andesite is a dark, fine-grained, brown or greyish intermediate volcanic rock which is a commonly found in lava
Syenite is a coarse-grained igneous rock which is composed mainly of alkali feldspar and various ferromagnesian minerals
1.2 History
1.2.1 Origin
North America
Unknown
1.2.2 Discoverer
Unknown
Unknown
1.3 Etymology
From Andes mountains, where it is found in abundance
From French syénite, from Latin Syenites (lapis ) (stone) of Syene
1.4 Class
Igneous Rocks
Igneous Rocks
1.4.1 Sub-Class
Durable Rock, Hard Rock
Durable Rock, Medium Hardness Rock
1.5 Family
1.5.1 Group
Volcanic
Plutonic
1.6 Other Categories
Fine Grained Rock, Opaque Rock
Coarse Grained Rock, Fine Grained Rock, Medium Grained Rock, Opaque Rock
2 Texture
2.1 Texture
Aphanitic to Porphyritic
Earthy
2.2 Color
Bluish - Grey, Grey, Pink, Yellow
Brown, Buff, Cream, Green, Grey, Pink, White
2.3 Maintenance
More
Less
2.4 Durability
Durable
Durable
2.4.1 Water Resistant
2.4.2 Scratch Resistant
2.4.3 Stain Resistant
2.4.4 Wind Resistant
2.4.5 Acid Resistant
2.5 Appearance
Dull and Soft
Banded and Foilated
3 Uses
3.1 Architecture
3.1.1 Interior Uses
Decorative Aggregates, Floor Tiles, Homes, Interior Decoration, Kitchens
Flooring, Homes, Hotels, Interior Decoration
3.1.2 Exterior Uses
Office Buildings, Roof Tiles
As Building Stone, As Facing Stone, Paving Stone, Garden Decoration, Office Buildings
3.1.3 Other Architectural Uses
Curbing
Curbing
3.2 Industry
3.2.1 Construction Industry
Cobblestones, Construction Aggregate, for Road Aggregate
As Dimension Stone, Cement Manufacture, Construction Aggregate, for Road Aggregate, Landscaping, Making natural cement, Manufacture of Magnesium and Dolomite Refractories
3.2.2 Medical Industry
Not Yet Used
Not Yet Used
3.3 Antiquity Uses
Artifacts, Monuments, Sculpture, Small Figurines
Artifacts, Monuments, Sculpture, Small Figurines
3.4 Other Uses
3.4.1 Commercial Uses
Commemorative Tablets, Creating Artwork
Cemetery Markers, Creating Artwork
4 Types
4.1 Types
Icelandite
Shonkinite
4.2 Features
Generally rough to touch, High silica content, Is one of the oldest rock
Available in Lots of Colors and Patterns, Is one of the oldest rock, Matrix variable
4.3 Archaeological Significance
4.3.1 Monuments
Used
Used
4.3.2 Famous Monuments
Middle of the Earth in Ecuador
Data Not Available
4.3.3 Sculpture
Used
Used
4.3.4 Famous Sculptures
Data Not Available
Data Not Available
4.3.5 Pictographs
Not Used
Used
4.3.6 Petroglyphs
Not Used
Used
4.3.7 Figurines
Used
Used
4.4 Fossils
Absent
Absent
5 Formation
5.1 Formation
Andesite is a fine-grained igneous rock that forms when the magma is erupted onto the surface and is crystallized quickly.
Syenites are formed due to alkaline igneous activities and are generally formed in thick continental crustal areas or in Cordilleran subduction zones.
5.2 Composition
5.2.1 Mineral Content
Amphibole, Apatite, Biotite, Feldspar, Garnet, Hornblade, Ilmenite, Magnetite, Plagioclase, Pyroxene, Zircon
Amphibole, Biotite, Feldspar, Hornblade, Micas, Muscovite or Illite, Plagioclase, Pyroxene, Quartz
5.2.2 Compound Content
Silicon Dioxide
Aluminium Oxide, CaO, Iron(III) Oxide, FeO, Potassium Oxide, MgO, MnO, Sodium Oxide, Phosphorus Pentoxide, Silicon Dioxide, Titanium Dioxide
5.3 Transformation
5.3.1 Metamorphism
5.3.2 Types of Metamorphism
Burial Metamorphism, Cataclastic Metamorphism, Contact Metamorphism, Hydrothermal Metamorphism, Impact Metamorphism, Regional Metamorphism
Burial Metamorphism, Cataclastic Metamorphism, Contact Metamorphism, Hydrothermal Metamorphism, Impact Metamorphism, Regional Metamorphism
5.3.3 Weathering
5.3.4 Types of Weathering
Biological Weathering, Chemical Weathering, Mechanical Weathering
Biological Weathering, Chemical Weathering, Mechanical Weathering
5.3.5 Erosion
5.3.6 Types of Erosion
Chemical Erosion, Coastal Erosion, Glacier Erosion
Chemical Erosion, Coastal Erosion, Glacier Erosion, Sea Erosion, Water Erosion, Wind Erosion
6 Properties
6.1 Physical Properties
6.1.1 Hardness
75.5-6
Coal
1 7
6.1.2 Grain Size
Very fine-grained
Medium to Fine Coarse Grained
6.1.3 Fracture
Uneven
Not Available
6.1.4 Streak
White
White
6.1.5 Porosity
Less Porous
Less Porous
6.1.6 Luster
Vitreous
Subvitreous to Dull
6.1.7 Compressive Strength
225.00 N/mm2150.00 N/mm2
What Is Obsidian
0.15 450
6.1.8 Cleavage
Not Available
Perfect
6.1.9 Toughness
1.1
Not Available
6.1.10 Specific Gravity
2.5-2.82.6-2.7
Granite
0 8.4
6.1.11 Transparency
Opaque
Opaque
6.1.12 Density
2.11-2.36 g/cm32.6-2.8 g/cm3
Granite
0 1400
6.2 Thermal Properties
6.2.1 Specific Heat Capacity
2.39 kJ/Kg K0.92 kJ/Kg K
What Is Granulite
0.14 3.2
6.2.2 Resistance
Heat Resistant, Pressure Resistant, Wear Resistant
Heat Resistant, Impact Resistant, Wear Resistant
7 Reserves
7.1 Deposits in Eastern Continents
7.1.1 Asia
India, Indonesia, Japan, Nepal, South Korea
China, India, Iran, Saudi Arabia, Sri Lanka, Taiwan, Thailand, Turkey, Vietnam
7.1.2 Africa
Egypt, Ethiopia, Morocco, Namibia, South Africa, Tanzania
Angola, Egypt, Madagascar, Namibia, Nigeria, South Africa
7.1.3 Europe
Austria, Finland, Germany, Italy, Romania, Turkey, United Kingdom
Bulgaria, England, Germany, Norway, Romania, Switzerland
7.1.4 Others
Not Yet Found
Not Yet Found
7.2 Deposits in Western Continents
7.2.1 North America
Mexico, USA
USA
7.2.2 South America
Argentina, Bolivia, Chile, Colombia, Ecuador, Peru, Venezuela
Brazil, Chile
7.3 Deposits in Oceania Continent
7.3.1 Australia
New South Wales, New Zealand, Western Australia
New Zealand, Queensland, South Australia, Western Australia

All about Andesite and Syenite Properties

Know all about Andesite and Syenite properties here. All properties of rocks are important as they define the type of rock and its application. Andesite and Syenite belong to Igneous Rocks.Texture of Andesite is Aphanitic to Porphyritic whereas that of Syenite is Earthy. Andesite appears Dull and Soft and Syenite appears Banded and Foilated. The luster of Andesite is vitreous while that of Syenite is subvitreous to dull. Andesite is available in bluish - grey, grey, pink, yellow colors whereas Syenite is available in brown, buff, cream, green, grey, pink, white colors. The commercial uses of Andesite are commemorative tablets, creating artwork and that of Syenite are cemetery markers, creating artwork.