Tuff

Jaspillite

Tuff and Jaspillite

Tuff

Jaspillite

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Definition

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

Jaspillite is an iron rich chemically formed rock which is common in banded iron formation rocks

History

Origin

Italy

Western Australia, Minnesota

Discoverer

Unknown

Etymology

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

From Jaspilite (Mineral), a compact siliceous rock which resembles jasper

Class

Igneous Rocks

Sedimentary Rocks

Sub-Class

Durable Rock, Medium Hardness Rock

Durable Rock, Soft Rock

Family

Group

Volcanic

Other Categories

Fine Grained Rock, Opaque Rock

Coarse Grained Rock, Opaque Rock

Texture

Clastic, Pyroclastic

Banded, Trellis

Color

Brown, Grey, Yellow

Red, Reddish Brown

Maintenance

Less

Durability

Durable

Water Resistant

✔ ✘

Scratch Resistant

✔ ✘

Stain Resistant

✔ ✘

Wind Resistant

✔ ✘

Acid Resistant

✔ ✘

Appearance

Dull, Vesicular and Foilated

Banded and Glassy

Uses

Architecture

Interior Uses

Decorative Aggregates, Entryways, Flooring, Homes, Interior Decoration

Decorative Aggregates, Interior Decoration

Exterior Uses

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

As Facing Stone, Garden Decoration, Paving Stone

Other Architectural Uses

Curbing

Industry

Construction Industry

Building houses or walls, Construction Aggregate

As a Flux in the Production of Steel and Pig Iron, As a Sintering Agent in Steel Industry to process Iron Ore, As Dimension Stone, Cement Manufacture, for Road Aggregate, Making natural cement, Manufacture of Magnesium and Dolomite Refractories

Medical Industry

Antiquity Uses

Artifacts, Monuments, Sculpture, Small Figurines

Artifacts, Jewellery, Monuments

Other Uses

Commercial Uses

Creating Artwork

Creating Artwork, Jewelry

Types

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

Algoma-type , Lake Superior-type and Superior-type

Features

Always found as volcanic pipes over deep continental crust

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

Present

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.

Jaspillite is a type of sedimentary rock which is formed by the compaction and sedimentation of pieces of broken or weathered rocks and minerals.

Composition

Mineral Content

Calcite, Chlorite

Coesite, Quartz, Sand

Compound Content

Hydrogen Sulfide, Sulfur Dioxide

Fe, Iron(III) Oxide, 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

Biological Weathering, Chemical Weathering

Erosion

✔ ✘

Types of Erosion

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

Chemical Erosion, Coastal Erosion

Properties

Physical Properties

Hardness

4-63

1 7

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Grain Size

Fine Grained

Large and Coarse Grained

Fracture

Uneven

Conchoidal

Streak

White

Porosity

Highly Porous

Very Less Porous

Luster

Vitreous to Dull

Earthy

Compressive Strength

243.80 N/mm²230.00 N/mm²

0.15 450

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Cleavage

Toughness

Specific Gravity

2.735.0-5.3

0 8.4

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Transparency

Opaque

Translucent to Opaque

Density

1-1.8 g/cm³0-5.7 g/cm³

0 1400

👆🏻

Thermal Properties

Specific Heat Capacity

0.20 kJ/Kg K3.20 kJ/Kg K

0.14 3.2

👆🏻

Resistance

Heat Resistant, Impact Resistant, Pressure Resistant, Wear Resistant

Heat Resistant, Impact Resistant, Wear 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

Russia

Africa

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

Europe

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

Ukraine

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

Brazil

Deposits in Oceania Continent

Australia

Central Australia, Western Australia

Western Australia

All about Tuff and Jaspillite Properties

Know all about Tuff and Jaspillite properties here. All properties of rocks are important as they define the type of rock and its application. Tuff belongs to Igneous Rocks while Jaspillite belongs to Sedimentary Rocks.Texture of Tuff is Clastic, Pyroclastic whereas that of Jaspillite is Banded, Trellis. Tuff appears Dull, Vesicular and Foilated and Jaspillite appears Banded and Glassy. The luster of Tuff is vitreous to dull while that of Jaspillite is earthy. Tuff is available in brown, grey, yellow colors whereas Jaspillite is available in red, reddish brown colors. The commercial uses of Tuff are creating artwork and that of Jaspillite are creating artwork, jewelry.