Tuff

Cataclasite

Tuff and Cataclasite

Tuff

Cataclasite

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Definition

Tuff is a type of rock made of volcanic ash ejected from a vent during a volcanic eruption

Cataclasite is a type of cataclastic rock that is formed by fracturing and comminution during faulting. It is normally cohesive and non-foliated, consisting of angular clasts in a finer-grained matrix

History

Origin

Italy

Swiss Alps, Europe

Discoverer

Unknown

Michael Tellinger

Etymology

From a Latin word tophous then in Italian tufo and finally tuff

From the Italian word cataclasi

Class

Igneous Rocks

Metamorphic Rocks

Sub-Class

Durable Rock, Medium Hardness Rock

Family

Group

Volcanic

Other Categories

Fine Grained Rock, Opaque Rock

Texture

Clastic, Pyroclastic

Clastic

Color

Brown, Grey, Yellow

Brown, Green, White, Yellow

Maintenance

Less

Durability

Durable

Water Resistant

✔ ✘

Scratch Resistant

✔ ✘

Stain Resistant

✔ ✘

Wind Resistant

✔ ✘

Acid Resistant

✔ ✘

Appearance

Dull, Vesicular and Foilated

Dull and Banded

Uses

Architecture

Interior Uses

Decorative Aggregates, Entryways, Flooring, Homes, Interior Decoration

Decorative Aggregates, Homes

Exterior Uses

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

As Building Stone, As Facing Stone, Paving Stone

Other Architectural Uses

Curbing

Industry

Construction Industry

Building houses or walls, Construction Aggregate

As Dimension Stone, Building houses or walls, Cement Manufacture, Construction Aggregate, for Road Aggregate

Medical Industry

Antiquity Uses

Artifacts, Monuments, Sculpture, Small Figurines

Artifacts

Other Uses

Commercial Uses

Creating Artwork

Commemorative Tablets, Creating Artwork

Types

Welded tuff, Rhyolitic tuff, Basaltic tuff, Trachyte tuff, Andesitic tuff and Ignimbrite.

Protocataclasite, Mesocataclasite, Ultracataclasite and Foliated cataclasite

Features

Always found as volcanic pipes over deep continental crust

Easily splits into thin plates, Is one of the oldest rock

Archaeological Significance

Monuments

Famous Monuments

Easter Island in the Polynesian Triangle, Pacific Ocean

Sculpture

Famous Sculptures

Pictographs

Petroglyphs

Figurines

Fossils

Absent

Formation

Tuff is formed when large masses of ash and sand which are mixed with hot gases are ejected by a volcano and avalanche rapidly down its slopes.

Cataclasiste rocks mainly form by pressure deep under the Earth's surface, from the extreme heat caused by magma or by the intense collisions and friction of tectonic plates.

Composition

Mineral Content

Calcite, Chlorite

Albite, Apatite, Augite, Biotite, Calcite, Enstatite, Epidote, Feldspar, Micas, Muscovite or Illite, Pyroxene, Quartz

Compound Content

Hydrogen Sulfide, Sulfur Dioxide

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

Mechanical Weathering

Erosion

✔ ✘

Types of Erosion

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

Coastal Erosion, Wind Erosion

Properties

Physical Properties

Hardness

4-63-4

1 7

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Grain Size

Fine Grained

Fracture

Uneven

Streak

White

Black

Porosity

Highly Porous

Less Porous

Luster

Vitreous to Dull

Vitreous

Compressive Strength

243.80 N/mm²50.00 N/mm²

0.15 450

👆🏻

Cleavage

Toughness

Specific Gravity

2.732.1

0 8.4

👆🏻

Transparency

Opaque

Translucent to Opaque

Density

1-1.8 g/cm³2.9-3.1 g/cm³

0 1400

👆🏻

Thermal Properties

Specific Heat Capacity

0.20 kJ/Kg K0.84 kJ/Kg K

0.14 3.2

👆🏻

Resistance

Heat Resistant, Impact Resistant, Pressure Resistant, Wear Resistant

Heat Resistant, Impact Resistant, Pressure Resistant

Reserves

Deposits in Eastern Continents

Asia

Afghanistan, Armenia, Azerbaijan, Burma, Cambodia, China, India, Indonesia, Iran, Japan, Malaysia, Mongolia, Nepal, North Korea, Pakistan, Saudi Arabia, Syria, Taiwan, Thailand, Turkey, Vietnam, Yemen

China, India, Russia, Saudi Arabia, South Korea

Africa

Cameroon, Cape Verde, Eritrea, Ethiopia, Kenya, Libya, Madagascar, Nigeria, Rwanda, South Africa, Sudan, Uganda

Egypt, Ethiopia, Kenya, Madagascar, Morocco, South Africa

Europe

France, Georgia, Germany, Greece, Iceland, Italy, Netherlands, Poland, Portugal, Spain, United Kingdom

England, Finland, France, Spain, United Kingdom

Others

Antarctica, Hawaii Islands

Deposits in Western Continents

North America

Canada, Costa Rica, Panama, USA

Canada, USA

South America

Argentina, Bolivia, Brazil, Chile, Ecuador, Paraguay

Argentina, Colombia

Deposits in Oceania Continent

Australia

Central Australia, Western Australia

All about Tuff and Cataclasite Properties

Know all about Tuff and Cataclasite properties here. All properties of rocks are important as they define the type of rock and its application. Tuff belongs to Igneous Rocks while Cataclasite belongs to Metamorphic Rocks.Texture of Tuff is Clastic, Pyroclastic whereas that of Cataclasite is Clastic. Tuff appears Dull, Vesicular and Foilated and Cataclasite appears Dull and Banded. The luster of Tuff is vitreous to dull while that of Cataclasite is vitreous. Tuff is available in brown, grey, yellow colors whereas Cataclasite is available in brown, green, white, yellow colors. The commercial uses of Tuff are creating artwork and that of Cataclasite are commemorative tablets, creating artwork.