Argillite

Gabbro

Argillite and Gabbro

Argillite

Gabbro

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Definition

Argillites are highly compact sedimentary or slightly metamorphosed rocks that consist largely or wholly of particles of clay or silt but lack the fissility of shale or the cleavage characteristic of slate

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

History

Origin

Germany

Discoverer

Unknown

Christian Leopold von Buch

Etymology

From Latin Argilla (clay) and -ite in English which became agrilla+ -ite = Argillite

From Latin glaber bare, smooth, bald

Class

Sedimentary Rocks

Igneous Rocks

Sub-Class

Durable Rock, Soft Rock

Durable Rock, Hard Rock

Family

Group

Plutonic

Other Categories

Fine Grained Rock, Opaque Rock

Coarse Grained Rock, Opaque Rock

Texture

Clastic, Polished

Phaneritic

Color

Dark Grey to Black, Pink, Red, White

Dark Grey to Black

Maintenance

Less

Durability

Durable

Water Resistant

✔ ✘

Scratch Resistant

✔ ✘

Stain Resistant

✔ ✘

Wind Resistant

✔ ✘

Acid Resistant

✔ ✘

Appearance

Rough and Dull

Veined and Shiny

Uses

Architecture

Interior Uses

Decorative Aggregates, Homes, Interior Decoration

Countertops, Decorative Aggregates, Homes, Interior Decoration

Exterior Uses

As Building Stone, Garden Decoration, Office Buildings

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

Other Architectural Uses

Curbing, Whetstones

Curbing

Industry

Construction Industry

Used for flooring, stair treads, borders and window sills.

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

Medical Industry

Antiquity Uses

Artifacts, Monuments, Sculpture

Other Uses

Commercial Uses

Fire resistant, Used to manufracture paperweights and bookends

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

Types

Metamorphic rock

Anorthosite Gabbro and Norite Gabbro

Features

Is one of the oldest rock

Smooth to touch

Archaeological Significance

Monuments

Famous Monuments

Sculpture

Famous Sculptures

Pictographs

Petroglyphs

Figurines

Fossils

Present

Absent

Formation

An argillite is a fine-grained sedimentary rock mainly composed of clay particles which forms from lithified muds which contain variable amounts of silt-sized particles.

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

Composition

Mineral Content

Biotite, Chlorite, Feldspar, Micas, Muscovite or Illite, Plagioclase, Pyrite, Quartz

Augite, Olivine, Plagioclase, Pyroxene

Compound Content

Iron(III) Oxide, Potassium Oxide, MgO, Silicon Dioxide

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

Transformation

Metamorphism

✔ ✘

Types of Metamorphism

Impact Metamorphism

Weathering

✔ ✘

Types of Weathering

Biological Weathering

Chemical Weathering

Erosion

✔ ✘

Types of Erosion

Chemical Erosion

Coastal Erosion

Properties

Physical Properties

Hardness

2-37

1 7

👆🏻

Grain Size

Fine Grained

Coarse Grained

Fracture

Conchoidal to Uneven

Conchoidal

Streak

White to Grey

Black

Porosity

Highly Porous

Luster

Waxy and Dull

Compressive Strength

-225.00 N/mm²

0.15 450

👆🏻

Cleavage

Slaty

Toughness

2.6

1.6

Specific Gravity

2.56-2.682.86-2.87

0 8.4

👆🏻

Transparency

Opaque

Density

2.54-2.66 g/cm³2.7-3.3 g/cm³

0 1400

👆🏻

Thermal Properties

Specific Heat Capacity

0.87 kJ/Kg K0.71 kJ/Kg K

0.14 3.2

👆🏻

Resistance

Heat Resistant, Impact Resistant

Impact Resistant, Pressure Resistant, Wear Resistant

Reserves

Deposits in Eastern Continents

Asia

Bangladesh, China, India, Russia

India, Russia

Africa

Ethiopia, Kenya, Morocco, South Africa, Tanzania

South Africa

Europe

Austria, France, Germany, Greece, Italy, Romania, Scotland, Spain, Switzerland

Germany, Greece, Italy, Scotland, Turkey

Others

Greenland

Deposits in Western Continents

North America

USA

Canada, USA

South America

Bolivia, Chile, Colombia, Ecuador, Peru, Venezuela

Brazil, Colombia, Venezuela

Deposits in Oceania Continent

Australia

New South Wales, New Zealand, Queensland, Victoria, Western Australia

New Zealand, Queensland

All about Argillite and Gabbro Properties

Know all about Argillite and Gabbro properties here. All properties of rocks are important as they define the type of rock and its application. Argillite belongs to Sedimentary Rocks while Gabbro belongs to Igneous Rocks.Texture of Argillite is Clastic, Polished whereas that of Gabbro is Phaneritic. Argillite appears Rough and Dull and Gabbro appears Veined and Shiny. The luster of Argillite is waxy and dull while that of Gabbro is . Argillite and Gabbro are available in dark grey to black, pink, red, white colors. The commercial uses of Argillite are fire resistant, used to manufracture paperweights and bookends and that of Gabbro are cemetery markers, commemorative tablets, laboratory bench tops, jewelry, sea defence, tombstones.