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Coquina and Carbonatite


Carbonatite and Coquina


Definition

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   
Carbonatite is intrusive or extrusive igneous rock which is defined by mineralogic composition, consisting of greater than 50 percent carbonate minerals   

History
  
  

Origin
European Foreland Basins   
Tanzania   

Discoverer
Unknown   
Unknown   

Etymology
From Concha (Latin)+ Coquina(Spanish) +conch(English)= Couquina (mid 19th century)   
From any intrusive igneous rock, having a majority of carbonate minerals   

Class
Sedimentary Rocks   
Igneous Rocks   

Sub-Class
Durable Rock, Soft Rock   
Durable Rock, Soft Rock   

Family
  
  

Group
Not Applicable   
Plutonic   

Other Categories
Coarse Grained Rock, Opaque Rock   
Coarse Grained Rock, Fine Grained Rock, Medium Grained Rock, Opaque Rock   

Texture

Texture
Clastic   
Granular, Poikiloblastic   

Color
Beige, Buff, Orange   
Black, Brown, Colourless, Green, Grey, Pink, White   

Maintenance
More   
Less   

Durability
Non-Durable   
Durable   

Water Resistant
No   
Yes   

Scratch Resistant
No   
No   

Stain Resistant
No   
No   

Wind Resistant
No   
No   

Acid Resistant
No   
No   

Appearance
Layered, Banded, Veined and Shiny   
Dull, Banded and Foilated   

Uses

Architecture
  
  

Interior Uses
Decorative Aggregates, Homes, Hotels, Interior Decoration   
Decorative Aggregates, Interior Decoration   

Exterior Uses
Garden Decoration, Office Buildings   
As Facing Stone, Garden Decoration   

Other Architectural Uses
Curbing   
Curbing   

Industry
  
  

Construction Industry
Building houses or walls, Construction Aggregate   
As a Flux in the Production of Steel and Pig Iron, As a Sintering Agent in Steel Industry to process Iron Ore, As Dimension Stone, Cement Manufacture, for Road Aggregate, Making natural cement, Manufacture of Magnesium and Dolomite Refractories, Unknown, Unknown   

Medical Industry
Not Yet Used   
Taken as a Supplement for Calcium or Magnesium   

Antiquity Uses
Artifacts, Monuments, Sculpture, Small Figurines   
Artifacts   

Other Uses
  
  

Commercial Uses
Creating Artwork   
An Oil and Gas Reservoir, As a Feed Additive for Livestock, Gemstone, Metallurgical Flux   

Types

Types
Not Available   
Not Available   

Features
Available in Lots of Colors and Patterns, Is one of the oldest rock   
Available in lots of colors, Generally rough to touch, Is one of the oldest rock   

Archaeological Significance
  
  

Monuments
Used   
Not Yet Used   

Famous Monuments
Data Not Available   
Not Applicable   

Sculpture
Used   
Not Yet Used   

Famous Sculptures
Data Not Available   
Not Applicable   

Pictographs
Used   
Used   

Petroglyphs
Used   
Used   

Figurines
Used   
Not Yet Used   

Fossils
Present   
Absent   

Formation

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.   
Carbonatites are intrusive or extrusive igneous rocks which are defined by mineralogic composition consisting of greater than 50 percent carbonate minerals and are formed due to low degrees of partial melting of rocks.   

Composition
  
  

Mineral Content
Apatite, Augite, Bronzite, Calcite, Chert, Chlorite, Clay Minerals, Epidote, Feldspar, Garnet, Micas, Muscovite or Illite   
Ancylite, Apatite, Barite, Fluorite, Magnetite, Natrolite, Sodalite   

Compound Content
CaO, Carbon Dioxide, Iron(III) Oxide, MgO   
CaO, Carbon Dioxide, Sodium Oxide   

Transformation
  
  

Metamorphism
No   
Yes   

Types of Metamorphism
Not Applicable   
Burial Metamorphism, Contact Metamorphism   

Weathering
Yes   
Yes   

Types of Weathering
Biological Weathering, Chemical Weathering, Mechanical Weathering   
Biological Weathering, Chemical Weathering, Mechanical Weathering   

Erosion
Yes   
Yes   

Types of Erosion
Coastal Erosion, Sea Erosion, Water Erosion, Wind Erosion   
Chemical Erosion, Wind Erosion   

Properties

Physical Properties
  
  

Hardness
1-2   
3   

Grain Size
Coarse Grained   
Medium to Fine Coarse Grained   

Fracture
Irregular   
Conchoidal   

Streak
White   
White   

Porosity
Highly Porous   
Less Porous   

Luster
Dull to Vitreous to Submetallic   
Subvitreous to Dull   

Cleavage
Not Available   
Not Available   

Toughness
Not Available   
1   

Specific Gravity
1.10-2.24   
2.86-2.87   

Transparency
Opaque   
Opaque   

Density
2.8-2.9 g/cm3   
2.84-2.86 g/cm3   

Thermal Properties
  
  

Resistance
Heat Resistant, Impact Resistant, Pressure Resistant, Wear Resistant   
Heat Resistant, Pressure Resistant, Water Resistant   

Reserves

Deposits in Eastern Continents
  
  

Asia
Not Yet Found   
China, India, Kazakhstan, Mongolia, Russia, Uzbekistan   

Africa
Not Yet Found   
Namibia, Nigeria, South Africa   

Europe
United Kingdom   
Austria, Denmark, Germany, Great Britain, Netherlands, Norway, Poland, Sweden, Switzerland, United Kingdom   

Others
Not Yet Found   
Greenland   

Deposits in Western Continents
  
  

North America
USA   
Canada, USA   

South America
Not Yet Found   
Brazil   

Deposits in Oceania Continent
  
  

Australia
Not Yet Found   
New South Wales, New Zealand   

Summary >>
<< Reserves

All about Coquina and Carbonatite Properties

Know all about Coquina and Carbonatite properties here. All properties of rocks are important as they define the type of rock and its application. Coquina belongs to Sedimentary Rocks while Carbonatite belongs to Igneous Rocks.Texture of Coquina is Clastic whereas that of Carbonatite is Granular, Poikiloblastic. Coquina appears Layered, Banded, Veined and Shiny and Carbonatite appears Dull, Banded and Foilated. The luster of Coquina is dull to vitreous to submetallic while that of Carbonatite is subvitreous to dull. Coquina is available in beige, buff, orange colors whereas Carbonatite is available in black, brown, colourless, green, grey, pink, white colors. The commercial uses of Coquina are creating artwork and that of Carbonatite are an oil and gas reservoir, as a feed additive for livestock, gemstone, metallurgical flux.

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