Tachylite

Basaltic Trachyandesite

Tachylite and Basaltic Trachyandesite

Tachylite

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Definition

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

Basaltic Trachyandesite is an extrusive igneous rock which is a type of Basalt rock and is formed by the rapid cooling of basaltic lava exposed at or very near the Earth's surface

History

Origin

Iceland

Discoverer

Unknown

Etymology

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

From its mineral and compound content and its relation with Basalt and Andesite rock

Class

Igneous Rocks

Sub-Class

Durable Rock, Medium Hardness Rock

Family

Group

Volcanic

Other Categories

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

Fine Grained Rock, Opaque Rock

Texture

Vitreous

Glassy, Massive, Porphyritic, Scoriaceous, Vesicular

Color

Black, Dark Brown

Black, Brown, Light to Dark Grey

Maintenance

Less

Durability

Durable

Water Resistant

✔ ✘

Scratch Resistant

✔ ✘

Stain Resistant

✔ ✘

Wind Resistant

✔ ✘

Acid Resistant

✔ ✘

Appearance

Glassy

Dull and Soft

Uses

Architecture

Interior Uses

Decorative Aggregates, Interior Decoration

Floor Tiles, Homes, Hotels, Kitchens

Exterior Uses

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

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

Other Architectural Uses

Curbing

Curbing, Whetstones

Industry

Construction Industry

Cutting Tool, Knives, Landscaping, Scrapers

As Dimension Stone, Cobblestones, Rail Track Ballast, Roadstone

Medical Industry

Antiquity Uses

Artifacts

Artifacts, Monuments

Other Uses

Commercial Uses

Cemetery Markers, Creating Artwork

An Oil and Gas Reservoir, Commemorative Tablets, Creating Artwork

Types

Volcanic glass

Alkaline Basalt, Boninite, High Alumina Basalt, Mid Ocean Ridge Basalt (MORB), Tholeiitic Basalt, Basaltic trachyandesite, Mugearite and Shoshonite

Features

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

Has High structural resistance against erosion and climate, Very fine grained rock

Archaeological Significance

Monuments

Famous Monuments

Sculpture

Famous Sculptures

Pictographs

Petroglyphs

Figurines

Fossils

Absent

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.

Basaltic Trachandesite is a fine-grained, hard rock that forms when bits of lava shoot out of volcanoes.

Composition

Mineral Content

Feldspar, Olivine

Olivine, Plagioclase, Pyroxene

Compound Content

Fe, Mg

Aluminium Oxide, CaO, Iron(III) Oxide, FeO, Potassium Oxide, MgO, MnO, Sodium Oxide, Phosphorus Pentoxide, Silicon Dioxide, Titanium Dioxide

Transformation

Metamorphism

✔ ✘

Types of Metamorphism

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

Contact Metamorphism

Weathering

✔ ✘

Types of Weathering

Biological Weathering, Chemical Weathering, Mechanical Weathering

Biological Weathering

Erosion

✔ ✘

Types of Erosion

Chemical Erosion, Sea Erosion, Water Erosion, Wind Erosion

Properties

Physical Properties

Hardness

5.56

1 7

👆🏻

Grain Size

Medium to Fine Coarse Grained

Fine Grained

Fracture

Conchoidal

Streak

Vermilion

White to Grey

Porosity

Less Porous

Luster

Resinous

Compressive Strength

206.00 N/mm²37.50 N/mm²

0.15 450

👆🏻

Cleavage

Toughness

2.3

Specific Gravity

2.42.8-3

0 8.4

👆🏻

Transparency

Opaque

Density

3.058 g/cm³2.9-3.1 g/cm³

0 1400

👆🏻

Thermal Properties

Specific Heat Capacity

0.56 kJ/Kg K0.84 kJ/Kg K

0.14 3.2

👆🏻

Resistance

Heat Resistant, Impact Resistant, Wear Resistant

Heat Resistant, Pressure Resistant, Wear Resistant

Reserves

Deposits in Eastern Continents

Asia

Cambodia, Russia, South Korea

India, Russia

Africa

East Africa

South Africa

Europe

England, Germany, Hungary, Iceland, Scotland, Sweden

Iceland

Others

Hawaii Islands

Deposits in Western Continents

North America

USA

Canada, USA

South America

Brazil

Deposits in Oceania Continent

Australia

Victoria

All about Tachylite and Basaltic Trachyandesite Properties

Know all about Tachylite and Basaltic Trachyandesite properties here. All properties of rocks are important as they define the type of rock and its application. Tachylite and Basaltic Trachyandesite belong to Igneous Rocks.Texture of Tachylite is Vitreous whereas that of Basaltic Trachyandesite is Glassy, Massive, Porphyritic, Scoriaceous, Vesicular. Tachylite appears Glassy and Basaltic Trachyandesite appears Dull and Soft. The luster of Tachylite is resinous while that of Basaltic Trachyandesite is . Tachylite is available in black, dark brown colors whereas Basaltic Trachyandesite is available in black, brown, light to dark grey colors. The commercial uses of Tachylite are cemetery markers, creating artwork and that of Basaltic Trachyandesite are an oil and gas reservoir, commemorative tablets, creating artwork.