Home
Compare Rocks


Coquina and Claystone


Claystone 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   
Claystone is a fine-grained, dark gray to pink sedimentary rock which mainly consists of compacted and hardened clay   

History
  
  

Origin
European Foreland Basins   
Unknown   

Discoverer
Unknown   
Unknown   

Etymology
From Concha (Latin)+ Coquina(Spanish) +conch(English)= Couquina (mid 19th century)   
From English clay and stone as the rock contains more amount of clay   

Class
Sedimentary Rocks   
Sedimentary Rocks   

Sub-Class
Durable Rock, Soft Rock   
Durable Rock, Medium Hardness Rock   

Family
  
  

Group
Not Applicable   
Not Applicable   

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

Texture

Texture
Clastic   
Clastic   

Color
Beige, Buff, Orange   
Black, Blue, Brown, Green, Grey, Orange, Red, White, Yellow   

Maintenance
More   
More   

Durability
Non-Durable   
Durable   

Water Resistant
No   
Yes   

Scratch Resistant
No   
Yes   

Stain Resistant
No   
No   

Wind Resistant
No   
No   

Acid Resistant
No   
No   

Appearance
Layered, Banded, Veined and Shiny   
Rough and Dull   

Uses

Architecture
  
  

Interior Uses
Decorative Aggregates, Homes, Hotels, Interior Decoration   
Decorative Aggregates, Entryways, Floor Tiles, Homes, Interior Decoration   

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

Other Architectural Uses
Curbing   
Curbing   

Industry
  
  

Construction Industry
Building houses or walls, Construction Aggregate   
As a Sintering Agent in Steel Industry to process Iron Ore, Cement Manufacture, Construction Aggregate, for Road Aggregate, Making natural cement, Raw material for the manufacture of mortar   

Medical Industry
Not Yet Used   
Not Yet Used   

Antiquity Uses
Artifacts, Monuments, Sculpture, Small Figurines   
Artifacts, Sculpture, Small Figurines   

Other Uses
  
  

Commercial Uses
Creating Artwork   
Pottery   

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 and Patterns, Smooth to touch, Very fine grained rock   

Archaeological Significance
  
  

Monuments
Used   
Not Yet Used   

Famous Monuments
Data Not Available   
Not Applicable   

Sculpture
Used   
Used   

Famous Sculptures
Data Not Available   
Data Not Available   

Pictographs
Used   
Used   

Petroglyphs
Used   
Used   

Figurines
Used   
Used   

Fossils
Present   
Present   

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.   
Claystone is generally quite soft, but can be hard and brittle. It forms due to weathering of mudstone.   

Composition
  
  

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   

Compound Content
CaO, Carbon Dioxide, Iron(III) Oxide, MgO   
Aluminium Oxide, Ca, NaCl, CaO, Iron(III) Oxide, MgO, Silicon Dioxide   

Transformation
  
  

Metamorphism
No   
No   

Types of Metamorphism
Not Applicable   
Not Applicable   

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   
Coastal Erosion, Water Erosion   

Properties

Physical Properties
  
  

Hardness
1-2   
3.5-4   

Grain Size
Coarse Grained   
Fine Grained   

Fracture
Irregular   
Not Available   

Streak
White   
White   

Porosity
Highly Porous   
Very Less Porous   

Luster
Dull to Vitreous to Submetallic   
Dull   

Cleavage
Not Available   
Perfect   

Toughness
Not Available   
2.6   

Specific Gravity
1.10-2.24   
0   

Transparency
Opaque   
Opaque   

Density
2.8-2.9 g/cm3   
2-2.9 g/cm3   

Thermal Properties
  
  

Specific Heat Capacity
Not Available   
0.92 kJ/Kg K   
10

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

Reserves

Deposits in Eastern Continents
  
  

Asia
Not Yet Found   
Bangladesh, China, India, Russia   

Africa
Not Yet Found   
Ethiopia, Kenya, Morocco, South Africa, Tanzania   

Europe
United Kingdom   
Austria, France, Germany, Greece, Italy, Romania, Scotland, Spain, Switzerland   

Others
Not Yet Found   
Not Yet Found   

Deposits in Western Continents
  
  

North America
USA   
Canada, Panama, USA   

South America
Not Yet Found   
Bolivia, Chile, Colombia, Ecuador, Peru, Venezuela   

Deposits in Oceania Continent
  
  

Australia
Not Yet Found   
New South Wales, New Zealand, Queensland, Victoria, Western Australia   

Summary >>
<< Reserves

All about Coquina and Claystone Properties

Know all about Coquina and Claystone properties here. All properties of rocks are important as they define the type of rock and its application. Coquina and Claystone belong to Sedimentary Rocks.Texture of Coquina is Clastic whereas that of Claystone is Clastic. Coquina appears Layered, Banded, Veined and Shiny and Claystone appears Rough and Dull. The luster of Coquina is dull to vitreous to submetallic while that of Claystone is dull. Coquina is available in beige, buff, orange colors whereas Claystone is available in black, blue, brown, green, grey, orange, red, white, yellow colors. The commercial uses of Coquina are creating artwork and that of Claystone are pottery.

Compare Sedimentary Rocks

Fossil Rocks

Fossil Rocks

» More Fossil Rocks

Compare Sedimentary Rocks

» More Compare Sedimentary Rocks