Tachylite

Tuff

Tachylite and Tuff

Tachylite

Tuff

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1 Definition

1.1 Definition

Tachylite is a vitreous form of basaltic volcanic glass. This glass is formed naturally by the rapid cooling of molten basalt

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

1.2 History

1.2.1 Origin

Iceland

Italy

1.2.2 Discoverer

Unknown

1.3 Etymology

From German Tachylite, from tachy- + Greek lutos soluble, melting

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

1.4 Class

Igneous Rocks

1.4.1 Sub-Class

Durable Rock, Medium Hardness Rock

1.5 Family

1.5.1 Group

Volcanic

1.6 Other Categories

Coarse Grained Rock, Fine Grained Rock, Medium Grained Rock, Opaque Rock

Fine Grained Rock, Opaque Rock

2 Texture

2.1 Texture

Vitreous

Clastic, Pyroclastic

2.2 Color

Black, Dark Brown

Brown, Grey, Yellow

2.3 Maintenance

2.4 Durability

Durable

2.4.1 Water Resistant

✔ ✘

2.4.2 Scratch Resistant

✔ ✘

2.4.3 Stain Resistant

✔ ✘

2.4.4 Wind Resistant

✔ ✘

2.4.5 Acid Resistant

✔ ✘

2.5 Appearance

Glassy

Dull, Vesicular and Foilated

3 Uses

3.1 Architecture

3.1.1 Interior Uses

Decorative Aggregates, Interior Decoration

Decorative Aggregates, Entryways, Flooring, Homes, Interior Decoration

3.1.2 Exterior Uses

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

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

3.1.3 Other Architectural Uses

Curbing

3.2 Industry

3.2.1 Construction Industry

Cutting Tool, Knives, Landscaping, Scrapers

Building houses or walls, Construction Aggregate

3.2.2 Medical Industry

Not Yet Used

3.3 Antiquity Uses

Artifacts

Artifacts, Monuments, Sculpture, Small Figurines

3.4 Other Uses

3.4.1 Commercial Uses

Cemetery Markers, Creating Artwork

Creating Artwork

4 Types

4.1 Types

Not Available

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

4.2 Features

Available in Lots of Colors and Patterns, Clasts are smooth to touch, NA

Always found as volcanic pipes over deep continental crust

4.3 Archaeological Significance

4.3.1 Monuments

Not Yet Used

Used

4.3.2 Famous Monuments

Not Applicable

Easter Island in the Polynesian Triangle, Pacific Ocean

4.3.3 Sculpture

Not Yet Used

Used

4.3.4 Famous Sculptures

Not Applicable

Data Not Available

4.3.5 Pictographs

Used

4.3.6 Petroglyphs

Used

4.3.7 Figurines

Not Yet Used

Used

4.4 Fossils

Absent

5 Formation

5.1 Formation

Tachylite 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.

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.

5.2 Composition

5.2.1 Mineral Content

Feldspar, Olivine

Calcite, Chlorite

5.2.2 Compound Content

Fe, Mg

Hydrogen Sulfide, Sulfur Dioxide

5.3 Transformation

5.3.1 Metamorphism

✔ ✘

5.3.2 Types of Metamorphism

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

5.3.3 Weathering

✔ ✘

5.3.4 Types of Weathering

Biological Weathering, Chemical Weathering, Mechanical Weathering

5.3.5 Erosion

✔ ✘

5.3.6 Types of Erosion

Chemical Erosion, Sea Erosion, Water Erosion, Wind Erosion

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

6 Properties

6.1 Physical Properties

6.1.1 Hardness

5.54-6

1 7

6.1.2 Grain Size

Medium to Fine Coarse Grained

Fine Grained

6.1.3 Fracture

Conchoidal

Uneven

6.1.4 Streak

Vermilion

White

6.1.5 Porosity

Less Porous

Highly Porous

6.1.6 Luster

Resinous

Vitreous to Dull

6.1.7 Compressive Strength

206.00 N/mm²243.80 N/mm²

0.15 450

6.1.8 Cleavage

Not Available

6.1.9 Toughness

Not Available

6.1.10 Specific Gravity

2.42.73

0 8.4

6.1.11 Transparency

Opaque

6.1.12 Density

3.058 g/cm³1-1.8 g/cm³

0 1400

6.2 Thermal Properties

6.2.1 Specific Heat Capacity

0.56 kJ/Kg K0.20 kJ/Kg K

0.14 3.2

6.2.2 Resistance

Heat Resistant, Impact Resistant, Wear Resistant

Heat Resistant, Impact Resistant, Pressure Resistant, Wear Resistant

7 Reserves

7.1 Deposits in Eastern Continents

7.1.1 Asia

Cambodia, Russia, South Korea

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

7.1.2 Africa

East Africa

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

7.1.3 Europe

England, Germany, Hungary, Iceland, Scotland, Sweden

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

7.1.4 Others

Hawaii Islands

Antarctica, Hawaii Islands

7.2 Deposits in Western Continents

7.2.1 North America

USA

Canada, Costa Rica, Panama, USA

7.2.2 South America

Not Yet Found

Argentina, Bolivia, Brazil, Chile, Ecuador, Paraguay

7.3 Deposits in Oceania Continent

7.3.1 Australia

Victoria

Central Australia, Western Australia

All about Tachylite and Tuff Properties

Know all about Tachylite and Tuff properties here. All properties of rocks are important as they define the type of rock and its application. Tachylite and Tuff belong to Igneous Rocks.Texture of Tachylite is Vitreous whereas that of Tuff is Clastic, Pyroclastic. Tachylite appears Glassy and Tuff appears Dull, Vesicular and Foilated. The luster of Tachylite is resinous while that of Tuff is vitreous to dull. Tachylite is available in black, dark brown colors whereas Tuff is available in brown, grey, yellow colors. The commercial uses of Tachylite and Tuff are cemetery markers, creating artwork.