Turbidite

Obsidian

Turbidite and Obsidian

Turbidite

Obsidian

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Definition

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

Obsidian is a naturally occurring volcanic glass formed as an extrusive igneous rock. It is produced when felsic lava extruded from a volcano cools rapidly with minimum crystal growth

History

Origin

European Foreland Basins

Ethiopia

Discoverer

Arnold H. Bouma

Obsius

Etymology

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

From Latin obsidianus, misprint of Obsianus (lapis) (stone) of Obsius

Class

Sedimentary Rocks

Igneous Rocks

Sub-Class

Durable Rock, Soft Rock

Durable Rock, Medium Hardness Rock

Family

Group

Volcanic

Other Categories

Coarse Grained Rock, Fine Grained Rock, Opaque Rock

Opaque Rock

Texture

Mud-rich, Sandy

Glassy

Color

Black, Brown, Green, Grey, Pink

Black, Blue, Brown, Green, Orange, Red, Tan, Yellow

Maintenance

Less

Durability

Durable

Water Resistant

✔ ✘

Scratch Resistant

✔ ✘

Stain Resistant

✔ ✘

Wind Resistant

✔ ✘

Acid Resistant

✔ ✘

Appearance

Dull and Banded

Shiny

Uses

Architecture

Interior Uses

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

Decorative Aggregates, Interior Decoration

Exterior Uses

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

Garden Decoration

Other Architectural Uses

Curbing

Industry

Construction Industry

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

Arrowheads, Cutting Tool, Knives, Scrapers, Spear Points

Medical Industry

Surgery

Antiquity Uses

Artifacts, Monuments, Sculpture

Artifacts, Jewellery

Other Uses

Commercial Uses

Cemetery Markers, Creating Artwork

Creating Artwork, Mirror, Used in aquariums

Types

Sedimentary rock

Fireworks Obsidian, Mahogany, Sheen Obsidian, Snowflake obsidian and Velvet Peacock Obsidian

Features

High silica content, Host Rock for Lead

Blocks negativity, Helps to protect against depression

Archaeological Significance

Monuments

Famous Monuments

Sculpture

Famous Sculptures

Pictographs

Petroglyphs

Figurines

Fossils

Present

Absent

Formation

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.

When the lava is released from volcano, it undergoes a very rapid cooling which freezes the mechanisms of crystallization. The result is a volcanic glass with a uniform smooth texture.

Composition

Mineral Content

Coesite, Quartz, Sand

Compound Content

CaO, Carbon Dioxide, MgO

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

Transformation

Metamorphism

✔ ✘

Types of Metamorphism

Burial Metamorphism, Cataclastic Metamorphism, Contact Metamorphism

Weathering

✔ ✘

Types of Weathering

Biological Weathering, Chemical Weathering, Mechanical Weathering

Erosion

✔ ✘

Types of Erosion

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

Chemical Erosion, Coastal Erosion, Glacier Erosion

Properties

Physical Properties

Hardness

35-5.5

1 7

👆🏻

Grain Size

Fine to Coarse Grained

Fracture

Splintery

Conchoidal

Streak

White, Greenish White or Grey

White

Porosity

Very Less Porous

Luster

Metallic

Vitreous

Compressive Strength

200.00 N/mm²0.15 N/mm²

0.15 450

👆🏻

Cleavage

Disjunctive

Toughness

2.4

Specific Gravity

2.46-2.732.6-2.7

0 8.4

👆🏻

Transparency

Opaque

Translucent

Density

1.6-2.5 g/cm³2.6 g/cm³

0 1400

👆🏻

Thermal Properties

Specific Heat Capacity

0.92 kJ/Kg K0.92 kJ/Kg K

0.14 3.2

👆🏻

Resistance

Heat Resistant

Heat Resistant, Impact Resistant

Reserves

Deposits in Eastern Continents

Asia

Afghanistan, Indonesia, Japan, Russia

Africa

Western Africa

Kenya

Europe

Austria, Belarus, Romania, Switzerland, United Kingdom

Greece, Hungary, Iceland, Italy, Turkey

Others

Deposits in Western Continents

North America

Canada, USA

Canada, Mexico, USA

South America

Brazil, Colombia

Argentina, Chile, Ecuador, Peru

Deposits in Oceania Continent

Australia

New Zealand, Western Australia

New Zealand

All about Turbidite and Obsidian Properties

Know all about Turbidite and Obsidian properties here. All properties of rocks are important as they define the type of rock and its application. Turbidite belongs to Sedimentary Rocks while Obsidian belongs to Igneous Rocks.Texture of Turbidite is Mud-rich, Sandy whereas that of Obsidian is Glassy. Turbidite appears Dull and Banded and Obsidian appears Shiny. The luster of Turbidite is metallic while that of Obsidian is vitreous. Turbidite is available in black, brown, green, grey, pink colors whereas Obsidian is available in black, blue, brown, green, orange, red, tan, yellow colors. The commercial uses of Turbidite are cemetery markers, creating artwork and that of Obsidian are creating artwork, mirror, used in aquariums.