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Shale Rock

Types of Soft Rocks

Coal
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Chalk
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Mudstone
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Shale Definition

Definition
Shale is a fine-grained sedimentary rock which is formed by the compaction of silt and clay-size mineral particles

History of Shale

Origin
Unknown
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Discoverer
Unknown

Etymology
From German Schalstein laminated limestone, and Schalgebirge layer of stone in stratified rock. From Old English scealu in its base sense of- thing that divides or separate,

Class
Sedimentary Rocks
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Sub-Class
Durable Rock, Medium Hardness Rock
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Shale Family

Group
Not Applicable

Other Categories
Fine Grained Rock, Opaque Rock

Shale Texture

Texture
Clastic, Splintery
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Shale Color
Black, Brown, Buff, Green, Grey, Red, Yellow

Maintenance
More
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Durability
Durable

Water Resistant
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Scratch Resistant
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Stain Resistant
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Wind Resistant
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Acid Resistant
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Appearance
Muddy
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Shale Uses

Architecture

Interior Uses
Decorative Aggregates, Homes, Interior Decoration
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Exterior Uses
As Building Stone, As Facing Stone, Office Buildings
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Other Architectural Uses
Curbing

Industry

Construction Industry
Cement Manufacture, Construction Aggregate, for Road Aggregate, Making natural cement, Raw material for the manufacture of mortar

Medical Industry
Not Yet Used

Antiquity Uses
Artifacts, Sculpture
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Other Uses

Commercial Uses
Creating Artwork, Pottery
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Shale Types

Types
Red Shale, Black Shale, Green Shale, Grey Shale and Yellow Shale

Features
Easily splits into thin plates, Generally rough to touch, Very fine grained rock
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Archaeological Significance of Shale

Monuments
Used

Famous Monuments
Jantar Mantar in India

Sculpture
Used

Famous Sculptures
Data Not Available

Pictographs
Used

Petroglyphs
Used

Figurines
Used

Fossils
Present

Formation of Shale

Formation
Shale forms when very fine-grained clay particles are deposited in water which settle at the bottom of water bodies. They are later compacted hence forming shale.

Composition

Mineral Content
Albite, Biotite, Calcite, Chert, Chlorite, Dolomite, Hematite, Micas, Muscovite or Illite, Pyrite, Quartz, Silica, Sulfides
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Compound Content
Ca, Fe, Mg, Silicon Dioxide, Sodium
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Transformation

Metamorphism

Types of Metamorphism
Not Applicable

Weathering

Types of Weathering
Biological Weathering, Chemical Weathering, Mechanical Weathering

Erosion

Types of Erosion
Chemical Erosion, Coastal Erosion, Glacier Erosion

Properties of Shale

Physical Properties of Shale

Hardness
3

Grain Size
Very fine-grained
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Fracture
Not Available
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Streak
White
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Porosity
Highly Porous
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Luster
Dull
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Compressive Strength
95.00 N/mm2
21
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Cleavage
Slaty
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Toughness
2.6

Specific Gravity
2.2-2.8

Transparency
Opaque
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Density
2.4-2.8 g/cm3

Thermal Properties of Shale

Specific Heat Capacity
0.39 kJ/Kg K
23
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Resistance
Heat Resistant, Impact Resistant
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Shale Reserves

Shale Deposits in Eastern Continents

Asia
Bangladesh, China, India, Russia

Africa
Ethiopia, Kenya, Morocco, South Africa, Tanzania

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

Others
Not Yet Found

Shale Deposits in Western Continents

North America
USA

South America
Bolivia, Chile, Colombia, Ecuador, Peru, Venezuela

Shale Deposits in Oceania Continent

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

Information about Shale

Rocks are naturally occurring solids which are composed of minerals & have been used by humans since ages. From Stone Age, rocks are used for various purposes. Also, the metals and minerals found in rock play an important role in our life. Get to know all the Shale Uses. We have provided you with all information about Shale rock here. Shale is a fine-grained sedimentary rock which is formed by the compaction of silt and clay-size mineral particles. Shale is available in black, brown, buff, green, grey, red, yellow colors. The streak of a rock is the color of powder produced when it is dragged across an unweathered surface. The streak of Shale is white. Get to know more about Shale rock and characteristics of Shale rock in the next sections.

Characteristics of Shale

Many rocks have distinct characteristics. Some of the Properties of Shale are hardness, structure, streak, fracture etc. Shale is significant as it is composed of minerals and has variety of uses in our day to day life. The characteristics of Shale plays an important role in its identification. The hardness of Shale is 3 on Moh’s hardness scale. Rocks according to their hardness are divided into:Hard Rocks, Soft Rocks and Rocks with Medium Hardness. Fracture of Shale rock is not available. Its specific heat capacity is 0.39 kJ/Kg K. Shale is heat resistant, impact resistant. Some of its uses are:

  • Interior Uses: Decorative aggregates, Homes and Interior decoration.
  • Construction Industry: Cement manufacture, Construction aggregate, For road aggregate, Making natural cement, Raw material for the manufacture of mortar.

Know more about Shale rock in the next section.

More About Shale

Shale is a type of Sedimentary Rocks. The color of rock is one of its important property. Shale rock is available in black, brown, buff, green, grey, red, yellow colors. It is Muddy in appearance. The Shale mineral content includes Albite, Biotite, Calcite, Chert, Chlorite, Dolomite, Hematite, Micas, Muscovite or Illite, Pyrite, Quartz, Silica, Sulfides. Its compound content includes Ca, Fe, Mg, Silicon Dioxide, Sodium. Let’s move on to the types of Shale. The types of Shale include Red Shale, Black Shale, Green Shale, Grey Shale and Yellow Shale. Fossils are the remains of prehistoric plants or animals which are embedded in rock and preserved in petrified form. Fossils are found only in sedimentary rocks. As Shale belongs to Sedimentary Rocks, fossils are found in it.