Andesite

Whiteschist

Andesite and Whiteschist

Andesite

Whiteschist

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Definition

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

Whiteschist is an uncommon rock type belonging to a class of metamorphic rock, this is formed at high-ultra-high pressures

History

Origin

North America

Tasmania

Discoverer

Theodor von Gümbel

Unknown

Etymology

From Andes mountains, where it is found in abundance

From French schiste, Greek skhistos i.e. split

Class

Igneous Rocks

Metamorphic Rocks

Sub-Class

Durable Rock, Hard Rock

Durable Rock, Soft Rock

Family

Group

Volcanic

Other Categories

Fine Grained Rock, Opaque Rock

Fine Grained Rock, Medium Grained Rock, Opaque Rock

Texture

Aphanitic to Porphyritic

Foliated

Color

Bluish - Grey, Grey, Pink, Yellow

Green, Grey, White

Maintenance

Less

Durability

Durable

Water Resistant

✔ ✘

Scratch Resistant

✔ ✘

Stain Resistant

✔ ✘

Wind Resistant

✔ ✘

Acid Resistant

✔ ✘

Appearance

Dull and Soft

Banded and Foilated

Uses

Architecture

Interior Uses

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

Decorative Aggregates, Interior Decoration

Exterior Uses

Office Buildings, Roof Tiles

Garden Decoration, Paving Stone

Other Architectural Uses

Curbing

Industry

Construction Industry

Cobblestones, Construction Aggregate, for Road Aggregate

for Road Aggregate

Medical Industry

Antiquity Uses

Artifacts, Monuments, Sculpture, Small Figurines

Other Uses

Commercial Uses

Commemorative Tablets, Creating Artwork

Creating Artwork, Gemstone, Jewelry, Production of Lime

Types

Icelandite

Features

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

High percentage of mica, Host Rock for Lead

Archaeological Significance

Monuments

Famous Monuments

Middle of the Earth in Ecuador

Sculpture

Famous Sculptures

Pictographs

Petroglyphs

Figurines

Fossils

Absent

Formation

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

Whiteschist is formed by dynamic metamorphism at high temperatures and pressures that aligns the grains of mica, hornblende and other elongated minerals into thin layers.

Composition

Mineral Content

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

Carbonate, Coesite, Quartz, Silica

Compound Content

Silicon Dioxide

CaO, Mg, MgO, Silicon Dioxide

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

Physical Properties

Hardness

71.5

1 7

👆🏻

Grain Size

Very fine-grained

Fine to Medium Grained

Fracture

Uneven

Conchoidal

Streak

White

Porosity

Less Porous

Luster

Vitreous

Subvitreous to Dull

Compressive Strength

225.00 N/mm²200.00 N/mm²

0.15 450

👆🏻

Cleavage

Perfect

Toughness

1.1

Specific Gravity

2.5-2.82.86

0 8.4

👆🏻

Transparency

Opaque

Density

2.11-2.36 g/cm³2.8-2.9 g/cm³

0 1400

👆🏻

Thermal Properties

Specific Heat Capacity

2.39 kJ/Kg K0.92 kJ/Kg K

0.14 3.2

👆🏻

Resistance

Heat Resistant, Pressure Resistant, Wear Resistant

Heat Resistant

Reserves

Deposits in Eastern Continents

Asia

India, Indonesia, Japan, Nepal, South Korea

Afghanistan, Bangladesh, Bhutan, China, India, Japan, Kazakhstan, Malaysia, Pakistan, Russia, Thailand, Turkey, Vietnam

Africa

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

Egypt, Ethiopia, Morocco, Nigeria, South Africa

Europe

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

Austria, England, France, Georgia, Germany, Italy, Liechtenstein, Monaco, Norway, Slovenia, Spain, Sweden, Switzerland

Others

Deposits in Western Continents

North America

Mexico, USA

Canada, Costa Rica, Cuba, Mexico, Panama, USA

South America

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

Brazil, Colombia, Guyana

Deposits in Oceania Continent

Australia

New South Wales, New Zealand, Western Australia

New South Wales, New Zealand, Queensland

All about Andesite and Whiteschist Properties

Know all about Andesite and Whiteschist properties here. All properties of rocks are important as they define the type of rock and its application. Andesite belongs to Igneous Rocks while Whiteschist belongs to Metamorphic Rocks.Texture of Andesite is Aphanitic to Porphyritic whereas that of Whiteschist is Foliated. Andesite appears Dull and Soft and Whiteschist appears Banded and Foilated. The luster of Andesite is vitreous while that of Whiteschist is subvitreous to dull. Andesite is available in bluish - grey, grey, pink, yellow colors whereas Whiteschist is available in green, grey, white colors. The commercial uses of Andesite are commemorative tablets, creating artwork and that of Whiteschist are creating artwork, gemstone, jewelry, production of lime.