Gabbro

Trachyandesite

Gabbro and Trachyandesite

Gabbro

Trachyandesite

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Definition

Gabbro is an intrusive igneous rock which is chemically equivalent to plutonic Basalt

Trachyandesite is an extrusive igneous rock.

History

Origin

Germany

Indonesia

Discoverer

Christian Leopold von Buch

Unknown

Etymology

From Latin glaber bare, smooth, bald

From French trachyandésite, trachy + andésite andesite, a lava intermediate in composition between trachyte and andesite

Class

Igneous Rocks

Sub-Class

Durable Rock, Hard Rock

Durable Rock, Medium Hardness Rock

Family

Group

Plutonic

Volcanic

Other Categories

Coarse Grained Rock, Opaque Rock

Fine Grained Rock, Opaque Rock

Texture

Phaneritic

Glassy, Massive, Porphyritic, Scoriaceous, Vesicular

Color

Dark Grey to Black

Black, Brown, Light to Dark Grey

Maintenance

Less

Durability

Durable

Water Resistant

✔ ✘

Scratch Resistant

✔ ✘

Stain Resistant

✔ ✘

Wind Resistant

✔ ✘

Acid Resistant

✔ ✘

Appearance

Veined and Shiny

Dull and Soft

Uses

Architecture

Interior Uses

Countertops, Decorative Aggregates, Homes, Interior Decoration

Exterior Uses

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

As Building Stone, As Facing Stone, Garden Decoration

Other Architectural Uses

Curbing

Industry

Construction Industry

As Dimension Stone, Building houses or walls, Cement Manufacture, Construction Aggregate, for Road Aggregate

Building houses or walls, Cobblestones, for Road Aggregate, Rail Track Ballast, Roadstone

Medical Industry

Antiquity Uses

Artifacts, Monuments, Sculpture

Artifacts, Sculpture

Other Uses

Commercial Uses

Cemetery Markers, Commemorative Tablets, Laboratory bench tops, Jewelry, Sea Defence, Tombstones

Creating Artwork, Pottery

Types

Anorthosite Gabbro and Norite Gabbro

Basaltic Trachyandesite

Features

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

Gabbro, a mafic rock, forms due to cooling and crystallization of magma underneath Earth's surface.

Trachyandesite 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.

Composition

Mineral Content

Augite, Olivine, Plagioclase, Pyroxene

Alkali feldspar, Biotite, Olivine, Plagioclase, Pyroxene, Sodic plagioclase

Compound Content

Aluminium Oxide, CaO, Chromium(III) Oxide, Iron(III) Oxide, Potassium Oxide, MgO, Sodium Oxide, Silicon Dioxide, Sulfur Trioxide

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

Transformation

Metamorphism

✔ ✘

Types of Metamorphism

Impact Metamorphism

Cataclastic Metamorphism, Contact Metamorphism, Regional Metamorphism

Weathering

✔ ✘

Types of Weathering

Chemical Weathering

Biological Weathering, Chemical Weathering, Mechanical Weathering

Erosion

✔ ✘

Types of Erosion

Coastal Erosion

Chemical Erosion, Coastal Erosion, Water Erosion, Wind Erosion

Properties

Physical Properties

Hardness

74-5

1 7

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Grain Size

Coarse Grained

Fine Grained

Fracture

Conchoidal

Streak

Black

Light to dark brown

Porosity

Highly Porous

Less Porous

Luster

Earthy

Compressive Strength

225.00 N/mm²37.40 N/mm²

0.15 450

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Cleavage

Perfect

Toughness

1.6

2.3

Specific Gravity

2.86-2.872.8-3

0 8.4

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Transparency

Opaque

Density

2.7-3.3 g/cm³2.9-3.1 g/cm³

0 1400

👆🏻

Thermal Properties

Specific Heat Capacity

0.71 kJ/Kg K0.84 kJ/Kg K

0.14 3.2

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Resistance

Impact Resistant, Pressure Resistant, Wear Resistant

Heat Resistant, Pressure Resistant, Wear Resistant

Reserves

Deposits in Eastern Continents

Asia

India, Russia

Africa

South Africa

Europe

Germany, Greece, Italy, Scotland, Turkey

Iceland

Others

Greenland

Deposits in Western Continents

North America

Canada, USA

South America

Brazil, Colombia, Venezuela

Brazil

Deposits in Oceania Continent

Australia

New Zealand, Queensland

All about Gabbro and Trachyandesite Properties

Know all about Gabbro and Trachyandesite properties here. All properties of rocks are important as they define the type of rock and its application. Gabbro and Trachyandesite belong to Igneous Rocks.Texture of Gabbro is Phaneritic whereas that of Trachyandesite is Glassy, Massive, Porphyritic, Scoriaceous, Vesicular. Gabbro appears Veined and Shiny and Trachyandesite appears Dull and Soft. The luster of Gabbro is while that of Trachyandesite is earthy. Gabbro is available in dark grey to black colors whereas Trachyandesite is available in black, brown, light to dark grey colors. The commercial uses of Gabbro are cemetery markers, commemorative tablets, laboratory bench tops, jewelry, sea defence, tombstones and that of Trachyandesite are creating artwork, pottery.