Blueschist

Oolite

Blueschist and Oolite

Blueschist

Oolite

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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

Oolite is a sedimentary rock formed from ooids, spherical grains which are composed of concentric layers of calcite

History

Origin

USA

Discoverer

Edgar Bailey

William Smith

Etymology

From French schiste, Greek skhistos i.e. split

From oo- + -lite, after German Oolit. A rock consisting of fine grains of carbonate of lime

Class

Metamorphic Rocks

Sedimentary Rocks

Sub-Class

Durable Rock, Medium Hardness Rock

Family

Group

Volcanic

Other Categories

Fine Grained Rock, Medium Grained Rock, Opaque Rock

Fine Grained Rock, Opaque Rock

Texture

Foliated

Clastic or Non-Clastic

Color

Blue, Bluish - Grey, Purple, Shades of Blue

Black, Blue, Brown, Cream, Green, Grey, Pink, Red, Silver, White, Yellow

Maintenance

Less

Durability

Durable

Water Resistant

✔ ✘

Scratch Resistant

✔ ✘

Stain Resistant

✔ ✘

Wind Resistant

✔ ✘

Acid Resistant

✔ ✘

Appearance

Dull and Banded

Rounded and Rough

Uses

Architecture

Interior Uses

Floor Tiles, Flooring, Homes, Hotels, Kitchens

Decorative Aggregates, Flooring, Interior Decoration

Exterior Uses

Garden Decoration, Office Buildings

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

Other Architectural Uses

Industry

Construction Industry

As Dimension Stone, Cobblestones, Rail Track Ballast, Roadstone

Cement Manufacture, Cobblestones, Landscaping

Medical Industry

Antiquity Uses

Artifacts, Monuments, Sculpture

Artifacts

Other Uses

Commercial Uses

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

Creating Artwork, Jewelry, Used in aquariums

Types

Metamorphic rock

Pisolitic Oolite and Oncolitic Oolite

Features

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

Available in lots of colors, Generally rough to touch, Very fine grained rock

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.

Oolites form when layers of calcite are deposited around a sand grain or fossil piece and are rolled around in calm water, which makes them round.

Composition

Mineral Content

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

Calcite, Chert, Clay, Dolomite, Quartz, Sand, Silt

Compound Content

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

Aluminium Oxide, Ca, NaCl, CaO, Iron(III) Oxide, FeO, 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

Properties

Physical Properties

Hardness

3.5-43-4

1 7

👆🏻

Grain Size

Fine to Medium Grained

Fine Grained

Fracture

Conchoidal

Streak

White to Grey

White

Porosity

Highly Porous

Less Porous

Luster

Dull

Pearly to Shiny

Compressive Strength

220.00 N/mm²40.00 N/mm²

0.15 450

👆🏻

Cleavage

Slaty

Toughness

1.5

Specific Gravity

3-3.2-9999

0 8.4

👆🏻

Transparency

Opaque

Density

2.8-2.9 g/cm³-9999 g/cm³

0 1400

👆🏻

Thermal Properties

Specific Heat Capacity

0.84 kJ/Kg K0.65 kJ/Kg K

0.14 3.2

👆🏻

Resistance

Impact Resistant, Pressure Resistant

Heat Resistant, Wear Resistant

Reserves

Deposits in Eastern Continents

Asia

Japan, Turkey

Brunei, India, Indonesia, Malaysia, Singapore, Thailand, Vietnam

Africa

Egypt, Ethiopia, South Africa

Cameroon, Chad, Ghana, Kenya, Malawi, Sudan, Tanzania, Togo, Zambia, Zimbabwe

Europe

France, Greece, Iceland

United Kingdom

Others

Deposits in Western Continents

North America

USA

South America

Colombia

Deposits in Oceania Continent

Australia

New Zealand

Adelaide, New Zealand, Queensland, Victoria, Yorke Peninsula

All about Blueschist and Oolite Properties

Know all about Blueschist and Oolite properties here. All properties of rocks are important as they define the type of rock and its application. Blueschist belongs to Metamorphic Rocks while Oolite belongs to Sedimentary Rocks.Texture of Blueschist is Foliated whereas that of Oolite is Clastic or Non-Clastic. Blueschist appears Dull and Banded and Oolite appears Rounded and Rough. The luster of Blueschist is dull while that of Oolite is pearly to shiny. Blueschist is available in blue, bluish - grey, purple, shades of blue colors whereas Oolite is available in black, blue, brown, cream, green, grey, pink, red, silver, white, yellow colors. The commercial uses of Blueschist are cemetery markers, commemorative tablets, creating artwork, curling, tombstones and that of Oolite are creating artwork, jewelry, used in aquariums.