Blueschist

Metapelite

Blueschist and Metapelite

Blueschist

Metapelite

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Definition

Blueschist is a metamorphic rock which is generally blue in color and is formed under conditions of high pressure and low temperature

Metapelite is an old and currently not widely used field geological term for a clay rich fine-grained clastic sediment or sedimentary rock, i.e. mud or a mudstone

History

Origin

USA

Discoverer

Edgar Bailey

Unknown

Etymology

From French schiste, Greek skhistos i.e. split

From Pelos or clay in Greek

Class

Metamorphic Rocks

Sub-Class

Durable Rock, Medium Hardness Rock

Family

Group

Other Categories

Fine Grained Rock, Medium Grained Rock, Opaque Rock

Coarse Grained Rock, Fine Grained Rock, Medium Grained Rock, Opaque Rock

Texture

Foliated

Color

Blue, Bluish - Grey, Purple, Shades of Blue

Dark Greenish - Grey, Green, Light Green, Light Greenish Grey

Maintenance

Less

Durability

Durable

Water Resistant

✔ ✘

Scratch Resistant

✔ ✘

Stain Resistant

✔ ✘

Wind Resistant

✔ ✘

Acid Resistant

✔ ✘

Appearance

Dull and Banded

Banded

Uses

Architecture

Interior Uses

Floor Tiles, Flooring, Homes, Hotels, Kitchens

Decorative Aggregates, Interior Decoration

Exterior Uses

Garden Decoration, Office Buildings

As Building Stone, As Facing Stone

Other Architectural Uses

Curbing

Industry

Construction Industry

As Dimension Stone, Cobblestones, Rail Track Ballast, Roadstone

Cement Manufacture, Construction Aggregate, for Road Aggregate

Medical Industry

Antiquity Uses

Artifacts, Monuments, Sculpture

Artifacts

Other Uses

Commercial Uses

Cemetery Markers, Commemorative Tablets, Creating Artwork, Curling, Tombstones

Commemorative Tablets, Creating Artwork

Types

Metamorphic rock

Features

Has High structural resistance against erosion and climate, Very fine grained rock

Easily splits into thin plates, It is One of the Oldest, Strongest and Hardest Rock

Archaeological Significance

Monuments

Famous Monuments

Sculpture

Famous Sculptures

Pictographs

Petroglyphs

Figurines

Fossils

Absent

Formation

Blueschist forms due to the metamorphism of basalt and other rocks with similar composition at high pressures and low temperatures and approximately corresponding to a depth of 15 to 30 kilometers and 200 to 500 °C.

Due to change in environmental conditions, rocks are heated and pressurized deep inside the Earth's surface. Metapelite is formed from the extreme heat caused by magma or by the intense collisions and friction of tectonic plates.

Composition

Mineral Content

Albite, Chlorite, Epidote, Garnet, Glaucophane, Lawsonite, Muscovite or Illite, Quartz

Albite, Chlorite, Quartz

Compound Content

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

Aluminium Oxide, CaO, MgO

Transformation

Metamorphism

✔ ✘

Types of Metamorphism

Weathering

✔ ✘

Types of Weathering

Mechanical Weathering

Biological Weathering, Chemical Weathering, Mechanical Weathering

Erosion

✔ ✘

Types of Erosion

Chemical Erosion, Coastal Erosion, Water Erosion, Wind Erosion

Properties

Physical Properties

Hardness

3.5-45-6

1 7

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Grain Size

Fine to Medium Grained

Medium to Fine Coarse Grained

Fracture

Conchoidal

Fibrous

Streak

White to Grey

Porosity

Highly Porous

Luster

Dull

Earthy

Compressive Strength

220.00 N/mm²40.00 N/mm²

0.15 450

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Cleavage

Slaty

Toughness

1.5

Specific Gravity

3-3.23.4-3.7

0 8.4

👆🏻

Transparency

Opaque

Density

2.8-2.9 g/cm³0-300 g/cm³

0 1400

👆🏻

Thermal Properties

Specific Heat Capacity

0.84 kJ/Kg K0.72 kJ/Kg K

0.14 3.2

👆🏻

Resistance

Impact Resistant, Pressure Resistant

Heat Resistant, Impact Resistant, Pressure Resistant

Reserves

Deposits in Eastern Continents

Asia

Japan, Turkey

Africa

Egypt, Ethiopia, South Africa

Western Africa

Europe

France, Greece, Iceland

United Kingdom

Others

Deposits in Western Continents

North America

USA

South America

Brazil, Colombia, Ecuador

Deposits in Oceania Continent

Australia

New Zealand

Central Australia, Western Australia

All about Blueschist and Metapelite Properties

Know all about Blueschist and Metapelite properties here. All properties of rocks are important as they define the type of rock and its application. Blueschist and Metapelite belong to Metamorphic Rocks.Texture of Blueschist is Foliated whereas that of Metapelite is Foliated. Blueschist appears Dull and Banded and Metapelite appears Banded. The luster of Blueschist is dull while that of Metapelite is earthy. Blueschist is available in blue, bluish - grey, purple, shades of blue colors whereas Metapelite is available in dark greenish - grey, green, light green, light greenish grey colors. The commercial uses of Blueschist and Metapelite are cemetery markers, commemorative tablets, creating artwork, curling, tombstones.