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Shale and Rhyodacite


Rhyodacite and Shale


Definition

Definition
Shale is a fine-grained sedimentary rock which is formed by the compaction of silt and clay-size mineral particles   
Rhyodacite is an extrusive volcanic rock intermediate in composition between dacite and rhyolite   

History
  
  

Origin
Unknown   
USA   

Discoverer
Unknown   
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,   
Rhyo lite + dacite : a rock intermediate between rhyolite and dacite that is the extrusive equivalent of granodiorite   

Class
Sedimentary Rocks   
Igneous Rocks   

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

Family
  
  

Group
Not Applicable   
Volcanic   

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

Texture

Texture
Clastic, Splintery   
Earthy   

Color
Black, Brown, Buff, Green, Grey, Red, Yellow   
Black to Grey, Dark Greenish - Grey   

Maintenance
More   
More   

Durability
Durable   
Durable   

Water Resistant
No   
Yes   

Scratch Resistant
No   
Yes   

Stain Resistant
No   
No   

Wind Resistant
No   
No   

Acid Resistant
No   
No   

Appearance
Muddy   
Skeletal   

Uses

Architecture
  
  

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

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

Other Architectural Uses
Curbing   
Curbing   

Industry
  
  

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

Medical Industry
Not Yet Used   
Not Yet Used   

Antiquity Uses
Artifacts, Sculpture   
Artifacts   

Other Uses
  
  

Commercial Uses
Creating Artwork, Pottery   
Cemetery Markers, Creating Artwork   

Types

Types
Red Shale, Black Shale, Green Shale, Grey Shale and Yellow Shale   
Not Available   

Features
Easily splits into thin plates, Generally rough to touch, Very fine grained rock   
Available in Lots of Colors and Patterns   

Archaeological Significance
  
  

Monuments
Used   
Not Yet Used   

Famous Monuments
Jantar Mantar in India   
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
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.   
Rhyodacite is a fine-grained, hard rock which is a type of metasomatite, essentially altered basalt. It forms with or without crystallization, either below the surface as intrusive rocks or on the surface as extrusive rocks.   

Composition
  
  

Mineral Content
Albite, Biotite, Calcite, Chert, Chlorite, Dolomite, Hematite, Micas, Muscovite or Illite, Pyrite, Quartz, Silica, Sulfides   
Amphibole, Apatite, Biotite, Feldspar, Garnet, Hornblade, Magnetite, Plagioclase, Pyroxene, Quartz, Zircon   

Compound Content
Ca, Fe, Mg, Silicon Dioxide, Sodium   
Ca, Fe, Potassium Oxide, NA, Potassium, Silicon Dioxide   

Transformation
  
  

Metamorphism
No   
Yes   

Types of Metamorphism
Not Applicable   
Burial Metamorphism, Cataclastic Metamorphism, Contact Metamorphism, Hydrothermal Metamorphism, Impact Metamorphism, Regional 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
Chemical Erosion, Coastal Erosion, Glacier Erosion   
Chemical Erosion, Coastal Erosion, Glacier Erosion   

Properties

Physical Properties
  
  

Hardness
3   
5.5-6   

Grain Size
Very fine-grained   
Fine Grained   

Fracture
Not Available   
Conchoidal   

Streak
White   
Black   

Porosity
Highly Porous   
Less Porous   

Luster
Dull   
Greasy to Dull   

Compressive Strength
95.00 N/mm2   
20
200.50 N/mm2   
9

Cleavage
Slaty   
Not Available   

Toughness
2.6   
2.1   

Specific Gravity
2.2-2.8   
2.34-2.40   

Transparency
Opaque   
Opaque   

Density
2.4-2.8 g/cm3   
Not Available   

Thermal Properties
  
  

Specific Heat Capacity
0.39 kJ/Kg K   
23
1.12 kJ/Kg K   
7

Resistance
Heat Resistant, Impact Resistant   
Heat Resistant   

Reserves

Deposits in Eastern Continents
  
  

Asia
Bangladesh, China, India, Russia   
China, India, Iran, Saudi Arabia, Sri Lanka, Taiwan, Thailand, Turkey, Vietnam   

Africa
Ethiopia, Kenya, Morocco, South Africa, Tanzania   
Angola, Egypt, Madagascar, Namibia, Nigeria, South Africa   

Europe
Austria, France, Germany, Greece, Italy, Romania, Scotland, Spain, Switzerland   
Austria, Belgium, Finland, France, Germany, Italy, Norway, Sardinia, Spain, Switzerland   

Others
Not Yet Found   
Not Yet Found   

Deposits in Western Continents
  
  

North America
USA   
Canada, USA   

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

Deposits in Oceania Continent
  
  

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

Summary >>
<< Reserves

All about Shale and Rhyodacite Properties

Know all about Shale and Rhyodacite properties here. All properties of rocks are important as they define the type of rock and its application. Shale belongs to Sedimentary Rocks while Rhyodacite belongs to Igneous Rocks.Texture of Shale is Clastic, Splintery whereas that of Rhyodacite is Earthy. Shale appears Muddy and Rhyodacite appears Skeletal. The luster of Shale is dull while that of Rhyodacite is greasy to dull. Shale is available in black, brown, buff, green, grey, red, yellow colors whereas Rhyodacite is available in black to grey, dark greenish - grey colors. The commercial uses of Shale are creating artwork, pottery and that of Rhyodacite are cemetery markers, creating artwork.

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