Coquina

Argillite

Coquina and Argillite

Coquina

Argillite

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1 Definition

1.1 Definition

Coquina is a sedimentary rock that is composed either wholly or almost entirely of the transported, abraded, and mechanically-sorted fragments of the shells of molluscs, trilobites, brachiopods, or other invertebrates

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

1.2 History

1.2.1 Origin

European Foreland Basins

Unknown

1.2.2 Discoverer

Unknown

1.3 Etymology

From Concha (Latin)+ Coquina(Spanish) +conch(English)= Couquina (mid 19th century)

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

1.4 Class

Sedimentary Rocks

1.4.1 Sub-Class

Durable Rock, Soft Rock

1.5 Family

1.5.1 Group

Not Applicable

1.6 Other Categories

Coarse Grained Rock, Opaque Rock

Fine Grained Rock, Opaque Rock

2 Texture

2.1 Texture

Clastic

Clastic, Polished

2.2 Color

Beige, Buff, Orange

Dark Grey to Black, Pink, Red, White

2.3 Maintenance

Less

2.4 Durability

Non-Durable

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

Layered, Banded, Veined and Shiny

Rough and Dull

3 Uses

3.1 Architecture

3.1.1 Interior Uses

Decorative Aggregates, Homes, Hotels, Interior Decoration

Decorative Aggregates, Homes, Interior Decoration

3.1.2 Exterior Uses

Garden Decoration, Office Buildings

As Building Stone, Garden Decoration, Office Buildings

3.1.3 Other Architectural Uses

Curbing

Curbing, Whetstones

3.2 Industry

3.2.1 Construction Industry

Building houses or walls, Construction Aggregate

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

3.2.2 Medical Industry

Not Yet Used

3.3 Antiquity Uses

Artifacts, Monuments, Sculpture, Small Figurines

Artifacts, Monuments, Sculpture

3.4 Other Uses

3.4.1 Commercial Uses

Creating Artwork

Fire resistant, Used to manufracture paperweights and bookends

4 Types

4.1 Types

Not Available

4.2 Features

Available in Lots of Colors and Patterns, Is one of the oldest rock

Is one of the oldest rock

4.3 Archaeological Significance

4.3.1 Monuments

Used

4.3.2 Famous Monuments

Data Not Available

4.3.3 Sculpture

Used

4.3.4 Famous Sculptures

Data Not Available

4.3.5 Pictographs

Used

4.3.6 Petroglyphs

Used

4.3.7 Figurines

Used

4.4 Fossils

Present

5 Formation

5.1 Formation

Coquina is a sedimentary rock which is formed when billions of small clam-like seashell, called Coquina, or cockleshell are die and hence are deposited, buried and turns into a rock when pressure is applied.

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.

5.2 Composition

5.2.1 Mineral Content

Apatite, Augite, Bronzite, Calcite, Chert, Chlorite, Clay Minerals, Epidote, Feldspar, Garnet, Micas, Muscovite or Illite

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

5.2.2 Compound Content

CaO, Carbon Dioxide, Iron(III) Oxide, MgO

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

5.3 Transformation

5.3.1 Metamorphism

✔ ✘

5.3.2 Types of Metamorphism

Not Applicable

5.3.3 Weathering

✔ ✘

5.3.4 Types of Weathering

Biological Weathering, Chemical Weathering, Mechanical Weathering

Biological Weathering

5.3.5 Erosion

✔ ✘

5.3.6 Types of Erosion

Coastal Erosion, Sea Erosion, Water Erosion, Wind Erosion

Chemical Erosion

6 Properties

6.1 Physical Properties

6.1.1 Hardness

1-22-3

1 7

6.1.2 Grain Size

Coarse Grained

Fine Grained

6.1.3 Fracture

Irregular

Conchoidal to Uneven

6.1.4 Streak

White

White to Grey

6.1.5 Porosity

Highly Porous

6.1.6 Luster

Dull to Vitreous to Submetallic

Waxy and Dull

6.1.7 Compressive Strength

NANA

0.15 450

6.1.8 Cleavage

Not Available

Slaty

6.1.9 Toughness

Not Available

2.6

6.1.10 Specific Gravity

1.10-2.242.56-2.68

0 8.4

6.1.11 Transparency

Opaque

6.1.12 Density

2.8-2.9 g/cm³2.54-2.66 g/cm³

0 1400

6.2 Thermal Properties

6.2.1 Specific Heat Capacity

NA0.87 kJ/Kg K

0.14 3.2

6.2.2 Resistance

Heat Resistant, Impact Resistant, Pressure Resistant, Wear Resistant

Heat Resistant, Impact Resistant

7 Reserves

7.1 Deposits in Eastern Continents

7.1.1 Asia

Not Yet Found

Bangladesh, China, India, Russia

7.1.2 Africa

Not Yet Found

Ethiopia, Kenya, Morocco, South Africa, Tanzania

7.1.3 Europe

United Kingdom

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

7.1.4 Others

Not Yet Found

7.2 Deposits in Western Continents

7.2.1 North America

USA

7.2.2 South America

Not Yet Found

Bolivia, Chile, Colombia, Ecuador, Peru, Venezuela

7.3 Deposits in Oceania Continent

7.3.1 Australia

Not Yet Found

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

All about Coquina and Argillite Properties

Know all about Coquina and Argillite properties here. All properties of rocks are important as they define the type of rock and its application. Coquina and Argillite belong to Sedimentary Rocks.Texture of Coquina is Clastic whereas that of Argillite is Clastic, Polished. Coquina appears Layered, Banded, Veined and Shiny and Argillite appears Rough and Dull. The luster of Coquina is dull to vitreous to submetallic while that of Argillite is waxy and dull. Coquina is available in beige, buff, orange colors whereas Argillite is available in dark grey to black, pink, red, white colors. The commercial uses of Coquina are creating artwork and that of Argillite are fire resistant, used to manufracture paperweights and bookends.