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
History
Origin
European Foreland Basins
Discoverer
Unknown
Etymology
From Concha (Latin)+ Coquina(Spanish) +conch(English)= Couquina (mid 19th century)
Class
Sedimentary Rocks
Sub-Class
Durable Rock, Soft Rock
Family
Group
-
Other Categories
Coarse Grained Rock, Opaque Rock
Texture
Clastic
Color
Beige, Buff, Orange
Maintenance
More
Durability
Non-Durable
Water Resistant
✔
✘
58% - Sedimentary Rocks Rocks
Scratch Resistant
✔
✘
61% - Sedimentary Rocks Rocks
Stain Resistant
✔
✘
42% - Sedimentary Rocks Rocks
Wind Resistant
✔
✘
36% - Sedimentary Rocks Rocks
Acid Resistant
✔
✘
19% - Sedimentary Rocks Rocks
Appearance
Layered, Banded, Veined and Shiny
Architecture
Interior Uses
Decorative Aggregates, Homes, Hotels, Interior Decoration
Exterior Uses
Garden Decoration, Office Buildings
Other Architectural Uses
Curbing
Industry
Construction Industry
Building houses or walls, Construction Aggregate
Medical Industry
-
Antiquity Uses
Artifacts, Monuments, Sculpture, Small Figurines
Other Uses
Commercial Uses
Creating Artwork
Types
Sedimentary rock
Features
Available in Lots of Colors and Patterns, Is one of the oldest rock
Archaeological Significance
Monuments
-
Famous Monuments
-
Sculpture
-
Famous Sculptures
-
Pictographs
-
Petroglyphs
-
Figurines
-
Fossils
Present
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.
Composition
Mineral Content
Apatite, Augite, Bronzite, Calcite, Chert, Chlorite, Clay Minerals, Epidote, Feldspar, Garnet, Micas, Muscovite or Illite
Compound Content
CaO, Carbon Dioxide, Iron(III) Oxide, MgO
Transformation
Metamorphism
✔
✘
17% - Sedimentary Rocks Rocks
Types of Metamorphism
-
Weathering
✔
✘
78% - Sedimentary Rocks Rocks have it !
Types of Weathering
Biological Weathering, Chemical Weathering, Mechanical Weathering
Erosion
✔
✘
86% - Sedimentary Rocks Rocks have it !
Types of Erosion
Coastal Erosion, Sea Erosion, Water Erosion, Wind Erosion
Physical Properties
Hardness
1-2
1
7
👆🏻
Grain Size
Coarse Grained
Fracture
Irregular
Streak
White
Porosity
Highly Porous
Luster
Dull to Vitreous to Submetallic
Compressive Strength
-
0.15
450
👆🏻
Cleavage
-
Toughness
-
Specific Gravity
1.10-2.24
0
8.4
👆🏻
Transparency
Opaque
Density
2.8-2.9 g/cm3
0
1400
👆🏻
Thermal Properties
Specific Heat Capacity
0.84 kJ/Kg K
Rank: 15 (Overall)
0.14
3.2
👆🏻
Resistance
Heat Resistant, Impact Resistant, Pressure Resistant, Wear Resistant
Deposits in Eastern Continents
Asia
-
Africa
-
Europe
United Kingdom
Others
-
Deposits in Western Continents
North America
USA
South America
-
Deposits in Oceania Continent
Australia
-