Tuff

Flint

Tuff and Flint

Tuff

Flint

Add ⊕

1 Definition

1.1 Definition

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

Flint is a hard type of sedimentary rock that produces a small piece of burning material when hit by steel

1.2 History

1.2.1 Origin

Italy

Unknown

1.2.2 Discoverer

Unknown

1.3 Etymology

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

From Old English flint - a type of rock mainly known for high hardness and for giving off sparks when struck

1.4 Class

Igneous Rocks

Sedimentary Rocks

1.4.1 Sub-Class

Durable Rock, Medium Hardness Rock

Durable Rock, Hard Rock

1.5 Family

1.5.1 Group

Volcanic

Not Applicable

1.6 Other Categories

Fine Grained Rock, Opaque Rock

2 Texture

2.1 Texture

Clastic, Pyroclastic

Banded, Rough

2.2 Color

Brown, Grey, Yellow

Black, Brown, Green, Grey, Red, White

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

Glassy or Pearly

3 Uses

3.1 Architecture

3.1.1 Interior Uses

Decorative Aggregates, Entryways, Flooring, Homes, Interior Decoration

Decorative Aggregates, Homes, Interior Decoration

3.1.2 Exterior Uses

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

Building houses or walls, Construction Aggregate

Arrowheads, Cutting Tool, Spear Points

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

Creating Artwork, Gemstone, In fire-starting tools, Manufacture of tools, Metallurgical Flux, Jewelry, To ignite fire, Used in flintlock firearms

4 Types

4.1 Types

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

Not Available

4.2 Features

Always found as volcanic pipes over deep continental crust

Clasts are smooth to touch, Easily splits into thin plates, Has High structural resistance against erosion and climate

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

Not Used

4.3.6 Petroglyphs

Used

Not Used

4.3.7 Figurines

Used

Not Yet Used

4.4 Fossils

Absent

Present

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.

Flint is formed by the decomposition and compaction of various organisms such as sponges and diatoms under the water.

5.2 Composition

5.2.1 Mineral Content

Calcite, Chlorite

Silicon

5.2.2 Compound Content

Hydrogen Sulfide, Sulfur Dioxide

Silicon 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

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, Coastal Erosion, Water Erosion

6 Properties

6.1 Physical Properties

6.1.1 Hardness

4-67

1 7

6.1.2 Grain Size

Fine Grained

Very fine-grained

6.1.3 Fracture

Uneven

Conchoidal

6.1.4 Streak

White

6.1.5 Porosity

Highly Porous

6.1.6 Luster

Vitreous to Dull

Vitreous

6.1.7 Compressive Strength

243.80 N/mm²450.00 N/mm²

0.15 450

6.1.8 Cleavage

Not Available

Non-Existent

6.1.9 Toughness

Not Available

1.5

6.1.10 Specific Gravity

2.732.5-2.8

0 8.4

6.1.11 Transparency

Opaque

Translucent to Opaque

6.1.12 Density

1-1.8 g/cm³2.7-2.71 g/cm³

0 1400

6.2 Thermal Properties

6.2.1 Specific Heat Capacity

0.20 kJ/Kg K0.74 kJ/Kg K

0.14 3.2

6.2.2 Resistance

Heat Resistant, Impact Resistant, Pressure Resistant, Wear 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

Azerbaijan, China, Russia

7.1.2 Africa

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

Not Yet Found

7.1.3 Europe

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

Austria, Belgium, Cyprus, Denmark, France, Germany, Italy, Malta, Netherlands, Poland, Portugal, Romania, Spain, Sweden, Switzerland, Turkey, Ukraine, 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

USA

7.2.2 South America

Argentina, Bolivia, Brazil, Chile, Ecuador, Paraguay

Bolivia

7.3 Deposits in Oceania Continent

7.3.1 Australia

Central Australia, Western Australia

New Zealand, South Australia

All about Tuff and Flint Properties

Know all about Tuff and Flint properties here. All properties of rocks are important as they define the type of rock and its application. Tuff belongs to Igneous Rocks while Flint belongs to Sedimentary Rocks.Texture of Tuff is Clastic, Pyroclastic whereas that of Flint is Banded, Rough. Tuff appears Dull, Vesicular and Foilated and Flint appears Glassy or Pearly. The luster of Tuff is vitreous to dull while that of Flint is vitreous. Tuff is available in brown, grey, yellow colors whereas Flint is available in black, brown, green, grey, red, white colors. The commercial uses of Tuff are creating artwork and that of Flint are creating artwork, gemstone, in fire-starting tools, manufacture of tools, metallurgical flux, jewelry, to ignite fire, used in flintlock firearms.