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Andesite Rock

Types of Hard Rocks

Novaculite
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Granite
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Basalt
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Andesite Definition

Definition
Andesite is a dark, fine-grained, brown or greyish intermediate volcanic rock which is a commonly found in lava

History of Andesite

Origin
North America
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Discoverer
Unknown

Etymology
From Andes mountains, where it is found in abundance

Class
Igneous Rocks
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Sub-Class
Durable Rock, Hard Rock
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Andesite Family

Group
Volcanic

Other Categories
Fine Grained Rock, Opaque Rock

Andesite Texture

Texture
Aphanitic to Porphyritic
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Andesite Color
Bluish - Grey, Grey, Pink, Yellow

Maintenance
More
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Durability
Durable

Water Resistant
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Scratch Resistant
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Stain Resistant
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Wind Resistant
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Acid Resistant
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Appearance
Dull and Soft
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Andesite Uses

Architecture

Interior Uses
Decorative Aggregates, Floor Tiles, Homes, Interior Decoration, Kitchens
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Exterior Uses
Office Buildings, Roof Tiles
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Other Architectural Uses
Curbing

Industry

Construction Industry
Cobblestones, Construction Aggregate, for Road Aggregate

Medical Industry
Not Yet Used

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

Commercial Uses
Commemorative Tablets, Creating Artwork
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Andesite Types

Types
Icelandite

Features
Generally rough to touch, High silica content, Is one of the oldest rock
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Archaeological Significance of Andesite

Monuments
Used

Famous Monuments
Middle of the Earth in Ecuador

Sculpture
Used

Famous Sculptures
Data Not Available

Pictographs
Not Used

Petroglyphs
Not Used

Figurines
Used

Fossils
Absent

Formation of Andesite

Formation
Andesite is a fine-grained igneous rock that forms when the magma is erupted onto the surface and is crystallized quickly.

Composition

Mineral Content
Amphibole, Apatite, Biotite, Feldspar, Garnet, Hornblade, Ilmenite, Magnetite, Plagioclase, Pyroxene, Zircon
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Compound Content
Silicon Dioxide
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Transformation

Metamorphism

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

Weathering

Types of Weathering
Biological Weathering, Chemical Weathering, Mechanical Weathering

Erosion

Types of Erosion
Chemical Erosion, Coastal Erosion, Glacier Erosion

Properties of Andesite

Physical Properties of Andesite

Hardness
7

Grain Size
Very fine-grained
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Fracture
Uneven
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Streak
White
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Porosity
Less Porous
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Luster
Vitreous
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Compressive Strength
225.00 N/mm2
8
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Cleavage
Not Available
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Toughness
1.1

Specific Gravity
2.5-2.8

Transparency
Opaque
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Density
2.11-2.36 g/cm3

Thermal Properties of Andesite

Specific Heat Capacity
2.39 kJ/Kg K
2
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Resistance
Heat Resistant, Pressure Resistant, Wear Resistant
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Andesite Reserves

Andesite Deposits in Eastern Continents

Asia
India, Indonesia, Japan, Nepal, South Korea

Africa
Egypt, Ethiopia, Morocco, Namibia, South Africa, Tanzania

Europe
Austria, Finland, Germany, Italy, Romania, Turkey, United Kingdom

Others
Not Yet Found

Andesite Deposits in Western Continents

North America
Mexico, USA

South America
Argentina, Bolivia, Chile, Colombia, Ecuador, Peru, Venezuela

Andesite Deposits in Oceania Continent

Australia
New South Wales, New Zealand, Western Australia

Information about Andesite

Rocks are naturally occurring solids which are composed of minerals & have been used by humans since ages. From Stone Age, rocks are used for various purposes. Also, the metals and minerals found in rock play an important role in our life. Get to know all the Andesite Uses. We have provided you with all information about Andesite rock here. Andesite is a dark, fine-grained, brown or greyish intermediate volcanic rock which is a commonly found in lava. Andesite is available in bluish - grey, grey, pink, yellow colors. The streak of a rock is the color of powder produced when it is dragged across an unweathered surface. The streak of Andesite is white. Get to know more about Andesite rock and characteristics of Andesite rock in the next sections.

Characteristics of Andesite

Many rocks have distinct characteristics. Some of the Properties of Andesite are hardness, structure, streak, fracture etc. Andesite is significant as it is composed of minerals and has variety of uses in our day to day life. The characteristics of Andesite plays an important role in its identification. The hardness of Andesite is 7 on Moh’s hardness scale. Rocks according to their hardness are divided into:Hard Rocks, Soft Rocks and Rocks with Medium Hardness. Fracture of Andesite rock is uneven. Its specific heat capacity is 2.39 kJ/Kg K. Andesite is heat resistant, pressure resistant, wear resistant. Some of its uses are:

  • Interior Uses: Decorative aggregates, Floor tiles, Homes, Interior decoration and Kitchens.
  • Construction Industry: Cobblestones, Construction aggregate, For road aggregate.

Know more about Andesite rock in the next section.

More About Andesite

Andesite is a type of Igneous Rocks. The color of rock is one of its important property. Andesite rock is available in bluish - grey, grey, pink, yellow colors. It is Dull and Soft in appearance. The Andesite mineral content includes Amphibole, Apatite, Biotite, Feldspar, Garnet, Hornblade, Ilmenite, Magnetite, Plagioclase, Pyroxene, Zircon. Its compound content includes Silicon Dioxide. Let’s move on to the types of Andesite. The types of Andesite include Icelandite. Fossils are the remains of prehistoric plants or animals which are embedded in rock and preserved in petrified form. Fossils are found only in sedimentary rocks. As Andesite belongs to Igneous Rocks, fossils are not found in it.