Blueschist

Turbidite

Blueschist and Turbidite

Blueschist

Turbidite

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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

A sedimentary rock, deposit of a submarine turbidity currents and are composed of layered particles

History

Origin

USA

European Foreland Basins

Discoverer

Edgar Bailey

Arnold H. Bouma

Etymology

From French schiste, Greek skhistos i.e. split

From Medieval Latin turbiditas, from Latin turbidus (turbid). Turbidity current is from 1939

Class

Metamorphic Rocks

Sedimentary Rocks

Sub-Class

Durable Rock, Medium Hardness Rock

Durable Rock, Soft Rock

Family

Group

Other Categories

Fine Grained Rock, Medium Grained Rock, Opaque Rock

Coarse Grained Rock, Fine Grained Rock, Opaque Rock

Texture

Foliated

Mud-rich, Sandy

Color

Blue, Bluish - Grey, Purple, Shades of Blue

Black, Brown, Green, Grey, Pink

Maintenance

Less

Durability

Durable

Water Resistant

✔ ✘

Scratch Resistant

✔ ✘

Stain Resistant

✔ ✘

Wind Resistant

✔ ✘

Acid Resistant

✔ ✘

Appearance

Dull and Banded

Uses

Architecture

Interior Uses

Floor Tiles, Flooring, Homes, Hotels, Kitchens

Bathrooms, Countertops, Decorative Aggregates, Flooring, Homes, Interior Decoration

Exterior Uses

Garden Decoration, Office Buildings

As Building Stone, As Facing Stone, Paving Stone, Garden Decoration

Other Architectural Uses

Curbing

Industry

Construction Industry

As Dimension Stone, Cobblestones, Rail Track Ballast, Roadstone

As Dimension Stone, Cement Manufacture, Construction Aggregate, for Road Aggregate, Making natural cement

Medical Industry

Antiquity Uses

Artifacts, Monuments, Sculpture

Other Uses

Commercial Uses

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

Cemetery Markers, Creating Artwork

Types

Metamorphic rock

Sedimentary rock

Features

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

High silica content, Host Rock for Lead

Archaeological Significance

Monuments

Famous Monuments

Sculpture

Famous Sculptures

Pictographs

Petroglyphs

Figurines

Fossils

Absent

Present

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.

Turbidite is a type of sedimentary rock formed when a river carries or transports pieces of broken rock as it flows. These particles then settle down and are subjected to high temperature and pressures hence forming Turbidite.

Composition

Mineral Content

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

Coesite, Quartz, Sand

Compound Content

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

CaO, Carbon Dioxide, 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

Chemical Erosion, Coastal Erosion, Sea Erosion, Water Erosion, Wind Erosion

Properties

Physical Properties

Hardness

3.5-43

1 7

👆🏻

Grain Size

Fine to Medium Grained

Fine to Coarse Grained

Fracture

Conchoidal

Splintery

Streak

White to Grey

White, Greenish White or Grey

Porosity

Highly Porous

Very Less Porous

Luster

Dull

Metallic

Compressive Strength

220.00 N/mm²200.00 N/mm²

0.15 450

👆🏻

Cleavage

Slaty

Disjunctive

Toughness

1.5

2.4

Specific Gravity

3-3.22.46-2.73

0 8.4

👆🏻

Transparency

Opaque

Density

2.8-2.9 g/cm³1.6-2.5 g/cm³

0 1400

👆🏻

Thermal Properties

Specific Heat Capacity

0.84 kJ/Kg K0.92 kJ/Kg K

0.14 3.2

👆🏻

Resistance

Impact Resistant, Pressure Resistant

Heat Resistant

Reserves

Deposits in Eastern Continents

Asia

Japan, Turkey

Africa

Egypt, Ethiopia, South Africa

Western Africa

Europe

France, Greece, Iceland

Austria, Belarus, Romania, Switzerland, United Kingdom

Others

Deposits in Western Continents

North America

USA

Canada, USA

South America

Brazil, Colombia

Deposits in Oceania Continent

Australia

New Zealand

New Zealand, Western Australia

All about Blueschist and Turbidite Properties

Know all about Blueschist and Turbidite properties here. All properties of rocks are important as they define the type of rock and its application. Blueschist belongs to Metamorphic Rocks while Turbidite belongs to Sedimentary Rocks.Texture of Blueschist is Foliated whereas that of Turbidite is Mud-rich, Sandy. Blueschist appears Dull and Banded and Turbidite appears Dull and Banded. The luster of Blueschist is dull while that of Turbidite is metallic. Blueschist is available in blue, bluish - grey, purple, shades of blue colors whereas Turbidite is available in black, brown, green, grey, pink colors. The commercial uses of Blueschist and Turbidite are cemetery markers, commemorative tablets, creating artwork, curling, tombstones.