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Andesite Rock



Definition

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

History

Origin
North America

Discoverer
Theodor von Gümbel

Etymology
From Andes mountains, where it is found in abundance

Class
Igneous Rocks

Sub-Class
Durable Rock, Hard Rock

Family

Group
Volcanic

Other Categories
Fine Grained Rock, Opaque Rock

Texture

Texture
Aphanitic to Porphyritic

Color
Bluish - Grey, Grey, Pink, Yellow

Maintenance
More

Durability
Durable

Water Resistant
No

Scratch Resistant
Yes

Stain Resistant
Yes

Wind Resistant
No

Acid Resistant
Yes

Appearance
Dull and Soft

Uses

Architecture

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

Exterior Uses
Office Buildings, Roof Tiles

Other Architectural Uses
Curbing

Industry

Construction Industry
Cobblestones, Construction Aggregate, for Road Aggregate

Medical Industry
-

Antiquity Uses
Artifacts, Monuments, Sculpture, Small Figurines

Other Uses

Commercial Uses
Commemorative Tablets, Creating Artwork

Types

Types
Icelandite

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

Archaeological Significance

Monuments
-

Famous Monuments
Middle of the Earth in Ecuador

Sculpture
-

Famous Sculptures
-

Pictographs
-

Petroglyphs
-

Figurines
-

Fossils
Absent

Formation

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

Compound Content
Silicon Dioxide

Transformation

Metamorphism
Yes

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

Weathering
Yes

Types of Weathering
Biological Weathering, Chemical Weathering, Mechanical Weathering

Erosion
Yes

Types of Erosion
Chemical Erosion, Coastal Erosion, Glacier Erosion

Properties

Physical Properties

Hardness
7

Grain Size
Very fine-grained

Fracture
Uneven

Streak
White

Porosity
Less Porous

Luster
Vitreous

Compressive Strength
225.00 N/mm2 8

Cleavage
-

Toughness
1.1

Specific Gravity
2.5-2.8

Transparency
Opaque

Density
2.11-2.36 g/cm3

Thermal Properties

Specific Heat Capacity
2.39 kJ/Kg K 2

Resistance
Heat Resistant, Pressure Resistant, Wear Resistant

Reserves

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
-

Deposits in Western Continents

North America
Mexico, USA

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

Deposits in Oceania Continent

Australia
New South Wales, New Zealand, Western Australia

Definition >>
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Igneous Rocks

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.

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