Andesite and Granodiorite

Andesite

Granodiorite

Definition

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

Granodiorite is a coarse-grained intrusive igneous rock containing quartz and plagioclase, and which has composition in between granite and diorite

History

Origin

North America

Unknown

Discoverer

Unknown

Etymology

From Andes mountains, where it is found in abundance

From granite + diorite

Class

Igneous Rocks

Sub-Class

Durable Rock, Hard Rock

Durable Rock, Medium Hardness Rock

Family

Group

Volcanic

Plutonic

Other Categories

Fine Grained Rock, Opaque Rock

Coarse Grained Rock, Medium Grained Rock, Opaque Rock

Texture

Aphanitic to Porphyritic

Granular, Phaneritic

Color

Bluish - Grey, Grey, Pink, Yellow

Black, Grey, Orange, Pink, White

Maintenance

Durability

Durable

Water Resistant

Yes

Scratch Resistant

Yes

Stain Resistant

Yes

Wind Resistant

Yes

Acid Resistant

Yes

Appearance

Dull and Soft

Veined or Pebbled

Uses

Architecture

Interior Uses

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

Bathrooms, Countertops, Decorative Aggregates, Entryways, Floor Tiles, Flooring, Homes, Hotels, Interior Decoration, Stair Treads

Exterior Uses

Office Buildings, Roof Tiles

As Building Stone, Bridges, Paving Stone, Garden Decoration, Office Buildings, Resorts

Other Architectural Uses

Curbing

Not Yet Used

Industry

Construction Industry

Cobblestones, Construction Aggregate, for Road Aggregate

As Dimension Stone

Medical Industry

Not Yet Used

Antiquity Uses

Artifacts, Monuments, Sculpture, Small Figurines

Artifacts, Monuments, Sculpture

Other Uses

Commercial Uses

Commemorative Tablets, Creating Artwork

Curling, Gemstone, Laboratory bench tops, Tombstones

Types

Icelandite

Not Available

Features

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

Available in Lots of Colors and Patterns

Archaeological Significance

Monuments

Used

Famous Monuments

Middle of the Earth in Ecuador

Data Not Available

Sculpture

Used

Famous Sculptures

Data Not Available

Pictographs

Not Used

Used

Petroglyphs

Not Used

Used

Figurines

Used

Fossils

Absent

Formation

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

Granodiorite is an intrusive igneous rock which is very hard, crystalline and is visibly homogeneous in texture and forms by melting of continental rocks.

Composition

Mineral Content

Amphibole, Apatite, Biotite, Feldspar, Garnet, Hornblade, Ilmenite, Magnetite, Plagioclase, Pyroxene, Zircon

Amphibole, Biotite, Feldspar, Hornblade, Micas, Muscovite or Illite, Plagioclase, Pyroxene, Quartz

Compound Content

Silicon Dioxide

Aluminium Oxide, CaO, Iron(III) Oxide, FeO, Potassium Oxide, MgO, MnO, Sodium Oxide, Phosphorus Pentoxide, Silicon Dioxide, Titanium 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

Chemical Weathering

Erosion

Yes

Types of Erosion

Chemical Erosion, Coastal Erosion, Glacier Erosion

Chemical Erosion, Glacier Erosion, Wind Erosion

Properties

Physical Properties

Hardness

Grain Size

Very fine-grained

Medium to Coarse Grained

Fracture

Uneven

Not Available

Streak

White

Porosity

Less Porous

Luster

Vitreous

Grainy, Pearly and Vitreous

Compressive Strength

225.00 N/mm²

175.00 N/mm²

Cleavage

Not Available

Toughness

1.1

Not Available

Specific Gravity

2.5-2.8

2.6-2.7

Transparency

Opaque

Density

2.11-2.36 g/cm³

2.6-2.8 g/cm³

Thermal Properties

Specific Heat Capacity

2.39 kJ/Kg K

0.79 kJ/Kg K

Resistance

Heat Resistant, Pressure Resistant, Wear Resistant

Heat Resistant, Wear Resistant

Reserves

Deposits in Eastern Continents

Asia

India, Indonesia, Japan, Nepal, South Korea

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

Africa

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

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

Europe

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

Austria, Belgium, Finland, France, Germany, Italy, Norway, Sardinia, Spain, Switzerland, The Czech Republic, Venezuela

Others

Not Yet Found

Deposits in Western Continents

North America

Mexico, USA

Canada, USA

South America

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

Not Yet Found

Deposits in Oceania Continent

Australia

New South Wales, New Zealand, Western Australia

Not Yet Found

Summary >>

<< Reserves

All about Andesite and Granodiorite Properties

Know all about Andesite and Granodiorite properties here. All properties of rocks are important as they define the type of rock and its application. Andesite and Granodiorite belong to Igneous Rocks.Texture of Andesite is Aphanitic to Porphyritic whereas that of Granodiorite is Granular, Phaneritic. Andesite appears Dull and Soft and Granodiorite appears Veined or Pebbled. The luster of Andesite is vitreous while that of Granodiorite is grainy, pearly and vitreous. Andesite is available in bluish - grey, grey, pink, yellow colors whereas Granodiorite is available in black, grey, orange, pink, white colors. The commercial uses of Andesite are commemorative tablets, creating artwork and that of Granodiorite are curling, gemstone, laboratory bench tops, tombstones.