Tuff

Pantellerite

Tuff and Pantellerite

Tuff

Pantellerite

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Definition

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

Pantellerite is a peralkaline rhyolite. It has a higher iron and lower aluminium composition than comendite

History

Origin

Italy

Strait of sicily

Discoverer

Unknown

Etymology

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

From Pantelleria, a volcanic island in the Strait of Sicily

Class

Igneous Rocks

Sub-Class

Durable Rock, Medium Hardness Rock

Durable Rock, Hard Rock

Family

Group

Volcanic

Other Categories

Fine Grained Rock, Opaque Rock

Texture

Clastic, Pyroclastic

Eutaxitic

Color

Brown, Grey, Yellow

Dark Greenish - Grey

Maintenance

Less

Durability

Durable

Water Resistant

✔ ✘

Scratch Resistant

✔ ✘

Stain Resistant

✔ ✘

Wind Resistant

✔ ✘

Acid Resistant

✔ ✘

Appearance

Dull, Vesicular and Foilated

Layered and Foliated

Uses

Architecture

Interior Uses

Decorative Aggregates, Entryways, Flooring, Homes, Interior Decoration

Exterior Uses

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

Other Architectural Uses

Curbing

Industry

Construction Industry

Building houses or walls, Construction Aggregate

Medical Industry

Antiquity Uses

Artifacts, Monuments, Sculpture, Small Figurines

Artifacts, Sculpture

Other Uses

Commercial Uses

Creating Artwork

Types

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

Pantelleritic Ignimbrite

Features

Always found as volcanic pipes over deep continental crust

High Fe content

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.

Pantellerite is a fine-grained, hard rock which is a type of metasomatite, essentially altered basalt. It forms with or without crystallization, either below the surface as intrusive rocks or on the surface as extrusive rocks.

Composition

Mineral Content

Calcite, Chlorite

Amphibole, Feldspar, Ilmenite

Compound Content

Hydrogen Sulfide, Sulfur Dioxide

Al, Fe

Transformation

Metamorphism

✔ ✘

Types of Metamorphism

Burial Metamorphism, Cataclastic Metamorphism, Contact Metamorphism, Hydrothermal Metamorphism, Impact Metamorphism, Regional Metamorphism

Burial Metamorphism, Cataclastic Metamorphism

Weathering

✔ ✘

Types of Weathering

Biological Weathering, Chemical Weathering, Mechanical Weathering

Biological Weathering, Chemical Weathering

Erosion

✔ ✘

Types of Erosion

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

Properties

Physical Properties

Hardness

4-66-7

1 7

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Grain Size

Fine Grained

Fracture

Uneven

Sub-conchoidal

Streak

White

Porosity

Highly Porous

Less Porous

Luster

Vitreous to Dull

Earthy

Compressive Strength

243.80 N/mm²210.00 N/mm²

0.15 450

👆🏻

Cleavage

Conchoidal

Toughness

Specific Gravity

2.73-9999

0 8.4

👆🏻

Transparency

Opaque

Translucent to Opaque

Density

1-1.8 g/cm³-9999 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

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

Africa

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

Angola, Egypt, Madagascar, Namibia, Nigeria

Europe

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

Germany, Iceland, Ireland, Italy, 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, Bolivia, Brazil, Colombia, Ecuador

Deposits in Oceania Continent

Australia

Central Australia, Western Australia

Central Australia, Queensland, Western Australia

All about Tuff and Pantellerite Properties

Know all about Tuff and Pantellerite properties here. All properties of rocks are important as they define the type of rock and its application. Tuff and Pantellerite belong to Igneous Rocks.Texture of Tuff is Clastic, Pyroclastic whereas that of Pantellerite is Eutaxitic. Tuff appears Dull, Vesicular and Foilated and Pantellerite appears Layered and Foliated. The luster of Tuff is vitreous to dull while that of Pantellerite is earthy. Tuff is available in brown, grey, yellow colors whereas Pantellerite is available in dark greenish - grey colors. The commercial uses of Tuff and Pantellerite are creating artwork.