1 Definition
1.1 Definition
Slate is a fine-grained, foliated, homogeneous metamorphic rock derived from an original shale-type sedimentary rock composed of clay or volcanic ash through low-grade regional metamorphism
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
1.2 History
1.2.1 Origin
England
European Foreland Basins
1.2.2 Discoverer
1.3 Etymology
From Old French esclate, from esclat (French éclat)
From Concha (Latin)+ Coquina(Spanish) +conch(English)= Couquina (mid 19th century)
1.4 Class
Metamorphic Rocks
Sedimentary Rocks
1.4.1 Sub-Class
Durable Rock, Medium Hardness Rock
Durable Rock, Soft Rock
1.5 Family
1.5.1 Group
Not Applicable
Not Applicable
1.6 Other Categories
Fine Grained Rock, Opaque Rock
Coarse Grained Rock, Opaque Rock
2 Texture
2.1 Texture
2.2 Color
Black, Brown, Buff, Green, Light to Dark Grey, Purple, Red, Shades of Blue
Beige, Buff, Orange
2.3 Maintenance
2.4 Durability
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
1.2 Appearance
Dull
Layered, Banded, Veined and Shiny
2 Uses
2.1 Architecture
2.1.1 Interior Uses
Bathrooms, Decorative Aggregates, Entryways, Floor Tiles, Flooring, Homes, Hotels, Interior Decoration, Kitchens, Stair Treads
Decorative Aggregates, Homes, Hotels, Interior Decoration
2.1.3 Exterior Uses
As Building Stone, As Facing Stone, Garden Decoration, Paving Stone
Garden Decoration, Office Buildings
2.2.1 Other Architectural Uses
2.4 Industry
2.4.2 Construction Industry
As Dimension Stone
Building houses or walls, Construction Aggregate
2.4.4 Medical Industry
Not Yet Used
Not Yet Used
2.6 Antiquity Uses
Artifacts, Monuments, Sculpture, Small Figurines
Artifacts, Monuments, Sculpture, Small Figurines
2.8 Other Uses
2.8.1 Commercial Uses
Blackboards, Commemorative Tablets, Laboratory bench tops, Standard material for the bed of Billiard table, Standard material for the beds of Pool and Snooker table, Tombstones, Used in aquariums, Writing Slates
Creating Artwork
4 Types
4.1 Types
Not Available
Not Available
4.3 Features
Easily splits into thin plates, Surfaces are often shiny, Very fine grained rock
Available in Lots of Colors and Patterns, Is one of the oldest rock
4.5 Archaeological Significance
4.5.1 Monuments
4.6.3 Famous Monuments
Data Not Available
Data Not Available
4.6.5 Sculpture
4.6.6 Famous Sculptures
Data Not Available
Data Not Available
4.6.8 Pictographs
4.6.9 Petroglyphs
4.6.11 Figurines
4.7 Fossils
5 Formation
5.1 Formation
Slate is a low grade metamorphic rock that is generally formed by metamorphosis of mudstone or shale, under relatively low pressure and temperature conditions.
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.
5.2 Composition
5.2.1 Mineral Content
Apatite, Biotite, Chlorite, Feldspar, Graphite, Hematite, Kaolinite, Magnetite, Pyrite, Tourmaline, Zircon
Apatite, Augite, Bronzite, Calcite, Chert, Chlorite, Clay Minerals, Epidote, Feldspar, Garnet, Micas, Muscovite or Illite
5.2.2 Compound Content
Aluminium Oxide, CaO, Iron(III) Oxide, Potassium Oxide, MgO, Sodium Oxide, Silicon Dioxide, Titanium Dioxide
CaO, Carbon Dioxide, Iron(III) Oxide, MgO
5.3 Transformation
5.3.1 Metamorphism
5.3.2 Types of Metamorphism
Burial Metamorphism, Cataclastic Metamorphism, Regional Metamorphism
Not Applicable
5.4.1 Weathering
6.1.2 Types of Weathering
Biological Weathering, Chemical Weathering, Mechanical Weathering
Biological Weathering, Chemical Weathering, Mechanical Weathering
6.1.3 Erosion
6.1.6 Types of Erosion
Coastal Erosion, Glacier Erosion, Water Erosion, Wind Erosion
Coastal Erosion, Sea Erosion, Water Erosion, Wind Erosion
7 Properties
7.1 Physical Properties
7.2.1 Hardness
9.3.6 Grain Size
Very fine-grained
Coarse Grained
9.3.8 Fracture
10.1.2 Streak
Light to dark brown
White
10.1.3 Porosity
Less Porous
Highly Porous
10.1.4 Luster
Dull
Dull to Vitreous to Submetallic
10.1.5 Compressive Strength
10.1.17 Cleavage
10.1.18 Toughness
10.1.19 Specific Gravity
10.2.2 Transparency
10.2.3 Density
2.6-2.8 g/cm32.8-2.9 g/cm3
0
1400
10.3 Thermal Properties
10.3.1 Specific Heat Capacity
10.4.2 Resistance
Heat Resistant, Impact Resistant, Pressure Resistant, Wear Resistant
Heat Resistant, Impact Resistant, Pressure Resistant, Wear Resistant
11 Reserves
11.1 Deposits in Eastern Continents
11.1.1 Asia
China, India, Turkey
Not Yet Found
11.1.2 Africa
Not Yet Found
Not Yet Found
11.1.3 Europe
Belgium, France, Germany, Italy, Norway, Portugal, Spain, United Kingdom
United Kingdom
11.1.4 Others
11.2 Deposits in Western Continents
11.2.1 North America
11.2.2 South America
11.3 Deposits in Oceania Continent
11.3.1 Australia
Not Yet Found
Not Yet Found