Argillite

Charnockite

Argillite and Charnockite

Argillite

Charnockite

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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

Charnockite is a variety of granite containing minerals like orthopyroxene, quartz, and feldspar

History

Origin

Tamil Nadu, India

Discoverer

Unknown

T. H. Holland

Etymology

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

From Job Charnock, an administtrator of East India Company

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

Granular

Color

Dark Grey to Black, Pink, Red, White

Black, Grey, Orange, Pink, White

Maintenance

Less

Durability

Durable

Water Resistant

✔ ✘

Scratch Resistant

✔ ✘

Stain Resistant

✔ ✘

Wind Resistant

✔ ✘

Acid Resistant

✔ ✘

Appearance

Rough and Dull

Veined or Pebbled

Uses

Architecture

Interior Uses

Decorative Aggregates, Homes, Interior Decoration

Bathrooms, Countertops, Decorative Aggregates, Entryways, Floor Tiles, Homes, Hotels, Kitchens, Stair Treads

Exterior Uses

As Building Stone, Garden Decoration, Office Buildings

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

Other Architectural Uses

Curbing, Whetstones

Curbing

Industry

Construction Industry

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

As Dimension Stone

Medical Industry

Antiquity Uses

Artifacts, Monuments, Sculpture

Artifacts, Monuments, Sculpture, Small Figurines

Other Uses

Commercial Uses

Fire resistant, Used to manufracture paperweights and bookends

Curling, Gemstone, Laboratory bench tops, Tombstones

Types

Metamorphic rock

Enderbite

Features

Is one of the oldest rock

Available in Lots of Colors and Patterns, It is One of the Oldest, Strongest and Hardest Rock

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.

Charnockite is an intrusive igneous rock which is very hard and is formed due to weathering of existing rocks.

Composition

Mineral Content

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

Amphibole, Biotite, Feldspar, Hornblade, Micas, Muscovite or Illite, Olivine, Plagioclase, Pyroxene, Quartz

Compound Content

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

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, Contact Metamorphism, Regional Metamorphism

Weathering

✔ ✘

Types of Weathering

Biological Weathering

Erosion

✔ ✘

Types of Erosion

Chemical Erosion

Chemical Erosion, Water Erosion, Wind Erosion

Properties

Physical Properties

Hardness

2-36-7

1 7

👆🏻

Grain Size

Fine Grained

Coarse Grained

Fracture

Conchoidal to Uneven

Streak

White to Grey

White

Porosity

Highly Porous

Very Less Porous

Luster

Waxy and Dull

Compressive Strength

-190.00 N/mm²

0.15 450

👆🏻

Cleavage

Slaty

Toughness

2.6

Specific Gravity

2.56-2.68-9999

0 8.4

👆🏻

Transparency

Opaque

Density

2.54-2.66 g/cm³2.6 g/cm³

0 1400

👆🏻

Thermal Properties

Specific Heat Capacity

0.87 kJ/Kg K0.84 kJ/Kg K

0.14 3.2

👆🏻

Resistance

Heat Resistant, Impact Resistant

Heat Resistant, Wear Resistant

Reserves

Deposits in Eastern Continents

Asia

Bangladesh, China, India, Russia

India

Africa

Ethiopia, Kenya, Morocco, South Africa, Tanzania

East Africa, Ethiopia, Madagascar, Morocco, Mozambique

Europe

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

Albania, Romania, Scotland, United Kingdom

Others

Deposits in Western Continents

North America

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

Central Australia, Western Australia

All about Argillite and Charnockite Properties

Know all about Argillite and Charnockite properties here. All properties of rocks are important as they define the type of rock and its application. Argillite belongs to Sedimentary Rocks while Charnockite belongs to Igneous Rocks.Texture of Argillite is Clastic, Polished whereas that of Charnockite is Granular. Argillite appears Rough and Dull and Charnockite appears Veined or Pebbled. The luster of Argillite is waxy and dull while that of Charnockite is . Argillite is available in dark grey to black, pink, red, white colors whereas Charnockite is available in black, grey, orange, pink, white colors. The commercial uses of Argillite are fire resistant, used to manufracture paperweights and bookends and that of Charnockite are curling, gemstone, laboratory bench tops, tombstones.