Pseudotachylite

Travertine

Pseudotachylite and Travertine

Pseudotachylite

Travertine

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1 Definition

1.1 Definition

Very fine grained fault rock which is composed of glassy matrix that often contains inclusions of wall-rock fragments.

Travertine is a mineral consisting of layered calcium carbonate formed by deposition from spring waters

1.2 History

1.2.1 Origin

USA

Italy

1.2.2 Discoverer

Unknown

Marcus Vitruvius Pollio

1.3 Etymology

From pseudo- +‎ tachylite, a glassy rock generated by frictional heat within faults.

From Italian travertino a kind of building stone, from Tiburs, adjective from Tibur (Tivoli), in Italy

1.4 Class

Metamorphic Rocks

Sedimentary Rocks

1.4.1 Sub-Class

Durable Rock, Hard Rock

Durable Rock, Medium Hardness Rock

1.5 Family

1.5.1 Group

Not Applicable

1.6 Other Categories

Fine Grained Rock, Opaque Rock

2 Texture

2.1 Texture

Quench

Banded

2.2 Color

Black, Brown, Colourless, Green, Grey, Pink, White

Beige, Black, Blue, Brown, Grey, Red, White, Yellow

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 and Soft

Fibrous

3 Uses

3.1 Architecture

3.1.1 Interior Uses

Decorative Aggregates, Entryways, Interior Decoration

Decorative Aggregates, Entryways, Flooring, Homes, Interior Decoration

3.1.2 Exterior Uses

As Building Stone, As Facing Stone, Garden Decoration

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

As Dimension Stone, Cement Manufacture, for Road Aggregate, Making natural cement

As Dimension Stone, Building houses or walls, Cement Manufacture, Construction Aggregate, for Road Aggregate, Raw material for the manufacture of mortar

3.2.2 Medical Industry

Not Yet Used

3.3 Antiquity Uses

Artifacts, Monuments

Artifacts, Jewellery, Monuments, Sculpture, Small Figurines

3.4 Other Uses

3.4.1 Commercial Uses

Creating Artwork, Gemstone

Cemetery Markers, Creating Artwork, Gemstone, Jewelry, Paper Industry, Pottery

4 Types

4.1 Types

Not Available

4.2 Features

Host Rock for Lead

Stalactites and stalagmites are formed from this rock, Surfaces are often shiny, Very fine grained rock

4.3 Archaeological Significance

4.3.1 Monuments

Used

4.3.2 Famous Monuments

Data Not Available

Colosseum in Rome, Italy, Sacré Coeur in Paris, France, Trevi Fountain in Rome, Italy

4.3.3 Sculpture

Not Yet Used

Used

4.3.4 Famous Sculptures

Not Applicable

Data Not Available

4.3.5 Pictographs

Not Used

Used

4.3.6 Petroglyphs

Not Used

Used

4.3.7 Figurines

Not Yet Used

Used

4.4 Fossils

Absent

Present

5 Formation

5.1 Formation

Due to change in environmental conditions, rocks are heated and pressurized deep inside the Earth's surface. Pseudotachylite is formed from the extreme heat caused by magma or by the intense collisions and friction of tectonic plates.

Travertine is a type of sedimentary rock formed when a river carries or transports pieces of broken rock which then undergo sedimentation. They are then subjected to high temperature and pressure hence forming travertine rock.

5.2 Composition

5.2.1 Mineral Content

Iron Oxides, Pyroxene, Quartz, Stishovite, Sulfides

Calcite, Clay, Feldspar, Micas, Quartz

5.2.2 Compound Content

Carbon Dioxide, Silicon Dioxide, Sulfur Dioxide, Sulphur

Ca, NaCl, CaO, Oxygen

5.3 Transformation

5.3.1 Metamorphism

✔ ✘

5.3.2 Types of Metamorphism

Burial Metamorphism, Cataclastic Metamorphism, Contact Metamorphism

Not Applicable

5.3.3 Weathering

✔ ✘

5.3.4 Types of Weathering

Not Applicable

Biological Weathering, Chemical Weathering, Mechanical Weathering

5.3.5 Erosion

✔ ✘

5.3.6 Types of Erosion

Not Applicable

Chemical Erosion, Coastal Erosion, Glacier Erosion

6 Properties

6.1 Physical Properties

6.1.1 Hardness

73-4

1 7

6.1.2 Grain Size

Very fine-grained

Fine Grained

6.1.3 Fracture

Uneven

Splintery

6.1.4 Streak

Light to dark brown

White

6.1.5 Porosity

Less Porous

Highly Porous

6.1.6 Luster

Vitreous

Dull to Pearly

6.1.7 Compressive Strength

60.00 N/mm²80.00 N/mm²

0.15 450

6.1.8 Cleavage

Irregular

Non-Existent

6.1.9 Toughness

Not Available

6.1.10 Specific Gravity

2.46-2.861.68

0 8.4

6.1.11 Transparency

Transparent to Translucent

Opaque

6.1.12 Density

2.7-2.9 g/cm³2.71 g/cm³

0 1400

6.2 Thermal Properties

6.2.1 Specific Heat Capacity

0.92 kJ/Kg K1.09 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

South Korea

China, Russia

7.1.2 Africa

Western Africa

Not Yet Found

7.1.3 Europe

Great Britain, Switzerland

Austria, Italy, Portugal, United Kingdom

7.1.4 Others

Not Yet Found

7.2 Deposits in Western Continents

7.2.1 North America

Not Yet Found

Canada, USA

7.2.2 South America

Not Yet Found

Argentina, Bolivia, Ecuador

7.3 Deposits in Oceania Continent

7.3.1 Australia

Central Australia, Western Australia

Not Yet Found

All about Pseudotachylite and Travertine Properties

Know all about Pseudotachylite and Travertine properties here. All properties of rocks are important as they define the type of rock and its application. Pseudotachylite belongs to Metamorphic Rocks while Travertine belongs to Sedimentary Rocks.Texture of Pseudotachylite is Quench whereas that of Travertine is Banded. Pseudotachylite appears Dull and Soft and Travertine appears Fibrous. The luster of Pseudotachylite is vitreous while that of Travertine is dull to pearly. Pseudotachylite is available in black, brown, colourless, green, grey, pink, white colors whereas Travertine is available in beige, black, blue, brown, grey, red, white, yellow colors. The commercial uses of Pseudotachylite are creating artwork, gemstone and that of Travertine are cemetery markers, creating artwork, gemstone, jewelry, paper industry, pottery.