Tuff

Gossan

Tuff vs Gossan

Tuff

Gossan

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1 Definition

1.1 Definition

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

Gossan is intensely oxidized, weathered or decomposed rock, usually the upper and exposed part of an ore deposit or mineral vein.

1.2 History

1.2.1 Origin

Italy

Indonesia

1.2.2 Discoverer

Unknown

Cornish Gossen

1.3 Etymology

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

From Cornish gossen from gos, blood from Old Cornish guit

1.4 Class

Igneous Rocks

Metamorphic Rocks

1.4.1 Sub-Class

Durable Rock, Medium Hardness Rock

1.5 Family

1.5.1 Group

Volcanic

Not Applicable

1.6 Other Categories

Fine Grained Rock, Opaque Rock

Fine Grained Rock, Medium Grained Rock, Opaque Rock

2 Texture

2.1 Texture

Clastic, Pyroclastic

Rough, Sandy

2.2 Color

Brown, Grey, Yellow

Brown, Brown- Black, Gold, Green, Rust

2.3 Maintenance

Less

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

Dull, Vesicular and Foilated

Dull and Banded

3 Uses

3.1 Architecture

3.1.1 Interior Uses

Decorative Aggregates, Entryways, Flooring, Homes, Interior Decoration

Countertops, Decorative Aggregates, Interior Decoration

3.1.2 Exterior Uses

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

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

3.1.3 Other Architectural Uses

Curbing

3.2 Industry

3.2.1 Construction Industry

Building houses or walls, Construction Aggregate

As Dimension Stone, Cement Manufacture, Construction Aggregate, for Road Aggregate

3.2.2 Medical Industry

Not Yet Used

3.3 Antiquity Uses

Artifacts, Monuments, Sculpture, Small Figurines

Artifacts

3.4 Other Uses

3.4.1 Commercial Uses

Creating Artwork

Cemetery Markers, Commemorative Tablets, Gemstone

4 Types

4.1 Types

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

Translocated gossan and Leakage gossan

4.2 Features

Always found as volcanic pipes over deep continental crust

Clasts are smooth to touch, Easily splits into thin plates

4.3 Archaeological Significance

4.3.1 Monuments

Used

Not Yet Used

4.3.2 Famous Monuments

Easter Island in the Polynesian Triangle, Pacific Ocean

Not Applicable

4.3.3 Sculpture

Used

Not Yet Used

4.3.4 Famous Sculptures

Data Not Available

Not Applicable

4.3.5 Pictographs

Used

4.3.6 Petroglyphs

Used

4.3.7 Figurines

Used

Not Yet Used

4.4 Fossils

Absent

5 Formation

5.1 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.

Earth movements can cause rocks to be either deeply buried or squeezed and hence the rocks are heated and put under great pressure.

5.2 Composition

5.2.1 Mineral Content

Calcite, Chlorite

Apatite, Augite, Biotite, Bronzite, Calcite, Chert, Epidote, Feldspar, Hornblende, Micas, Plagioclase, Pyroxene, Quartz, Sulfides, Zircon

5.2.2 Compound Content

Hydrogen Sulfide, Sulfur Dioxide

Aluminium Oxide, CaO, Fe, FeO, Silicon Dioxide, Sulphur

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

Not Applicable

5.3.3 Weathering

✔ ✘

5.3.4 Types of Weathering

Biological Weathering, Chemical Weathering, Mechanical Weathering

Not Applicable

5.3.5 Erosion

✔ ✘

5.3.6 Types of Erosion

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

Chemical Erosion, Sea Erosion, Wind Erosion

6 Properties

6.1 Physical Properties

6.1.1 Hardness

4-64-5

1 7

6.1.2 Grain Size

Fine Grained

Fine to Medium Grained

6.1.3 Fracture

Uneven

Conchoidal

6.1.4 Streak

White

White to Grey

6.1.5 Porosity

Highly Porous

6.1.6 Luster

Vitreous to Dull

Metallic

6.1.7 Compressive Strength

243.80 N/mm²NA

0.15 450

6.1.8 Cleavage

Not Available

6.1.9 Toughness

Not Available

6.1.10 Specific Gravity

2.732.0

0 8.4

6.1.11 Transparency

Opaque

6.1.12 Density

1-1.8 g/cm³Not Available

0 1400

6.2 Thermal Properties

6.2.1 Specific Heat Capacity

0.20 kJ/Kg K0.24 kJ/Kg K

0.14 3.2

6.2.2 Resistance

Heat Resistant, Impact Resistant, Pressure Resistant, Wear Resistant

Heat Resistant, Impact Resistant, Pressure Resistant

7 Reserves

7.1 Deposits in Eastern Continents

7.1.1 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, Indonesia, Russia, Singapore, South Korea

7.1.2 Africa

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

Cape Verde, Ethiopia, Ghana, South Africa, Western Africa

7.1.3 Europe

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

Albania, France, Germany, Great Britain, United Kingdom

7.1.4 Others

Antarctica, Hawaii Islands

Not Yet Found

7.2 Deposits in Western Continents

7.2.1 North America

Canada, Costa Rica, Panama, USA

Canada, USA

7.2.2 South America

Argentina, Bolivia, Brazil, Chile, Ecuador, Paraguay

Brazil, Colombia, Ecuador

7.3 Deposits in Oceania Continent

7.3.1 Australia

Central Australia, Western Australia

New South Wales, South Australia, Western Australia

Tuff vs Gossan Information

Earth’s outer layer is covered by rocks and these rocks have different physical and chemical properties. As two rocks are not same, it’s fun to compare them. You can also know more about Tuff and Gossan Reserves. Tuff is a type of rock made of volcanic ash ejected from a vent during a volcanic eruption. Gossan is intensely oxidized, weathered or decomposed rock, usually the upper and exposed part of an ore deposit or mineral vein.. These rocks are composed of many distinct minerals. The process of formation of rocks is different for various rocks. Rocks are quarried from many years for various purposes. You can check out Tuff vs Gossan information and Tuff vs Gossan characteristics in the upcoming sections.

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Tuff vs Gossan Characteristics

Though some rocks look identical, they have certain characteristics which distinguish them from others. Characteristics of rocks include texture, appearance, color, fracture, streak, hardness etc. Tuff vs Gossan characteristics assist us to distinguish and recognize rocks. Also you can check about Properties of Tuff and Properties of Gossan. Learn more about Tuff vs Gossan in the next section. The interior uses of Tuff include Decorative aggregates, Entryways, Flooring, Homes and Interior decoration whereas the interior uses of Gossan include Countertops, Decorative aggregates and Interior decoration. Due to some exceptional properties of Tuff and Gossan, they have various applications in construction industry. The uses of Tuff in construction industry include Building houses or walls, Construction aggregate and that of Gossan include As dimension stone, Cement manufacture, Construction aggregate, For road aggregate.

More about Tuff and Gossan

Here you can know more about Tuff and Gossan. The life cycle of a rock consists of formation of rock, composition of rock and transformation of rock. The composition of Tuff and Gossan consists of mineral content and compound content. The mineral content of Tuff includes Calcite, Chlorite and mineral content of Gossan includes Apatite, Augite, Biotite, Bronzite, Calcite, Chert, Epidote, Feldspar, Hornblende, Micas, Plagioclase, Pyroxene, Quartz, Sulfides, Zircon. You can also check out the list of all Igneous Rocks. When we have to compare Tuff vs Gossan, the texture, color and appearance plays an important role in determining the type of rock. Tuff is available in brown, grey, yellow colors whereas, Gossan is available in brown, brown- black, gold, green, rust colors. Appearance of Tuff is Dull, Vesicular and Foilated and that of Gossan is Dull and Banded. Properties of rock is another aspect for Tuff vs Gossan. The hardness of Tuff is 4-6 and that of Gossan is 4-5. The types of Tuff are Welded tuff, Rhyolitic tuff, Basaltic tuff, Trachyte tuff, Andesitic tuff and Ignimbrite. whereas types of Gossan are Translocated gossan and Leakage gossan. Streak of rock is the color of powder produced when it is dragged across an unweathered surface. The streak of Tuff is white while that of Gossan is white to grey. The specific heat capacity of Tuff is 0.20 kJ/Kg K and that of Gossan is 0.24 kJ/Kg K. Depending on the properties like hardness, toughness, specific heat capacity, porosity etc., rocks are resistant to heat, wear, impact, etc.Tuff is heat resistant, impact resistant, pressure resistant, wear resistant whereas Gossan is heat resistant, impact resistant, pressure resistant.