Definition
Mylonite is a metamorphic rock formed by ductile deformation during intense shearing encountered during folding and faulting, a process termed cataclastic or dynamic metamorphism
  
Siltstone can be defined as a fine-grained sedimentary rock which mainly consists of consolidated silt
  
History
  
  
Origin
New Zealand
  
Unknown
  
Discoverer
Unknown
  
Unknown
  
Etymology
From Greek mulōn mill + -ite
  
From English word silt and stone and from Proto-Indo-European root sal and stainaz
  
Class
Metamorphic Rocks
  
Sedimentary Rocks
  
Sub-Class
Durable Rock, Medium Hardness Rock
  
Durable Rock, Hard Rock
  
Family
  
  
Group
Not Applicable
  
Not Applicable
  
Other Categories
Fine Grained Rock, Opaque Rock
  
Fine Grained Rock, Opaque Rock
  
Texture
Foliated
  
Clastic
  
Color
Black to Grey
  
Brown, Red, Reddish Brown
  
Maintenance
Less
  
Less
  
Durability
Durable
  
Durable
  
Water Resistant
Yes
  
Yes
  
Scratch Resistant
Yes
  
Yes
  
Stain Resistant
No
  
No
  
Wind Resistant
No
  
Yes
  
Acid Resistant
No
  
Yes
  
Appearance
Dull, Banded and Foilated
  
Rough
  
Architecture
  
  
Interior Uses
Decorative Aggregates, Interior Decoration
  
Decorative Aggregates, Interior Decoration
  
Exterior Uses
As Building Stone, As Facing Stone, Paving Stone, Garden Decoration
  
As Building Stone, As Facing Stone, Garden Decoration
  
Other Architectural Uses
Curbing
  
Curbing
  
Industry
  
  
Construction Industry
for Road Aggregate, Landscaping, Roadstone
  
Building houses or walls, 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
  
Artifacts, Sculpture, Small Figurines
  
Other Uses
  
  
Commercial Uses
Creating Artwork, Gemstone, Jewelry
  
Raw material for the manufacture of mortar, Soil Conditioner
  
Types
Blastomylonites, Ultramylonites and Phyllonites
  
Not Available
  
Features
Surfaces are often shiny
  
Available in Lots of Colors and Patterns, Easily splits into thin plates, Generally rough to touch, High silica content, 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
  
Not Used
  
Petroglyphs
Used
  
Not Used
  
Figurines
Used
  
Used
  
Fossils
Absent
  
Present
  
Formation
Mylonites are ductilely deformed rocks formed by the accumulation of large shear strain, in ductile fault zones.
  
Siltstone is a type of sedimentary rock which is formed from fine rock particles. As the particles of eroded rock travel along with water, the edges of the rock are worn-out by water into a rounded shape.
  
Composition
  
  
Mineral Content
Porphyroblasts
  
Calcite, Clay, Clay Minerals, Feldspar, Micas, Quartz, Sand, Silica, Silt
  
Compound Content
Aluminium Oxide, Calcium Sulfate, Chromium(III) Oxide, Iron(III) Oxide, Magnesium Carbonate, Silicon Dioxide
  
Aluminium Oxide, CaO, Iron(III) Oxide, Potassium Oxide, MgO, Sodium Oxide, 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
Chemical Erosion, Sea Erosion, Wind Erosion
  
Chemical Erosion, Coastal Erosion, Glacier Erosion
  
Physical Properties
  
  
Hardness
3-4
  
6-7
  
Grain Size
Fine Grained
  
Fine Grained
  
Fracture
Conchoidal
  
Conchoidal
  
Streak
White
  
White
  
Porosity
Highly Porous
  
Highly Porous
  
Luster
Shiny
  
Dull
  
Compressive Strength
Not Available
  
Cleavage
Conchoidal
  
Not Available
  
Toughness
Not Available
  
2.6
  
Specific Gravity
2.97-3.05
  
2.54-2.73
  
Transparency
Opaque
  
Opaque
  
Density
2.6-4.8 g/cm3
  
2.6-2.7 g/cm3
  
Thermal Properties
  
  
Specific Heat Capacity
1.50 kJ/Kg K
  
3
Not Available
  
Resistance
Heat Resistant, Impact Resistant, Pressure Resistant
  
Heat Resistant, Impact Resistant, Pressure Resistant, Water Resistant
  
Deposits in Eastern Continents
  
  
Asia
China, India, Indonesia, Saudi Arabia, South Korea
  
China, India, Kazakhstan, Mongolia, Russia, Uzbekistan
  
Africa
Eritrea, Ethiopia, Ghana, South Africa, Western Africa
  
Namibia, Nigeria, South Africa
  
Europe
England, Finland, France, Germany, Great Britain, Greece, United Kingdom
  
Austria, Denmark, Germany, Great Britain, Netherlands, Norway, Poland, Sweden, Switzerland, United Kingdom
  
Others
Not Yet Found
  
Greenland
  
Deposits in Western Continents
  
  
North America
USA
  
Canada, USA
  
South America
Not Yet Found
  
Brazil
  
Deposits in Oceania Continent
  
  
Australia
Central Australia, Western Australia
  
New South Wales, New Zealand
  
Mylonite vs Siltstone Characteristics
Though some rocks look identical, they have certain characteristics which distinguish them from others. Characteristics of rocks include texture, appearance, color, fracture, streak, hardness etc. Mylonite vs Siltstone characteristics assist us to distinguish and recognize rocks. Also you can check about Properties of Mylonite and Properties of Siltstone. Learn more about Mylonite vs Siltstone in the next section. The interior uses of Mylonite include Decorative aggregates and Interior decoration whereas the interior uses of Siltstone include Decorative aggregates and Interior decoration. Due to some exceptional properties of Mylonite and Siltstone, they have various applications in construction industry. The uses of Mylonite in construction industry include For road aggregate, Landscaping, Roadstone and that of Siltstone include Building houses or walls, Cement manufacture, Construction aggregate, For road aggregate, Making natural cement, Raw material for the manufacture of mortar.
More about Mylonite and Siltstone
Here you can know more about Mylonite and Siltstone. The life cycle of a rock consists of formation of rock, composition of rock and transformation of rock. The composition of Mylonite and Siltstone consists of mineral content and compound content. The mineral content of Mylonite includes Porphyroblasts and mineral content of Siltstone includes Calcite, Clay, Clay Minerals, Feldspar, Micas, Quartz, Sand, Silica, Silt. You can also check out the list of all Metamorphic Rocks. When we have to compare Mylonite vs Siltstone, the texture, color and appearance plays an important role in determining the type of rock. Mylonite is available in black to grey colors whereas, Siltstone is available in brown, red, reddish brown colors. Appearance of Mylonite is Dull, Banded and Foilated and that of Siltstone is Rough. Properties of rock is another aspect for Mylonite vs Siltstone. The hardness of Mylonite is 3-4 and that of Siltstone is 6-7. The types of Mylonite are Blastomylonites, Ultramylonites and Phyllonites whereas types of Siltstone are Not Available. Streak of rock is the color of powder produced when it is dragged across an unweathered surface. The streak of Mylonite and Siltstone is white. The specific heat capacity of Mylonite is 1.50 kJ/Kg K and that of Siltstone is Not Available. Depending on the properties like hardness, toughness, specific heat capacity, porosity etc., rocks are resistant to heat, wear, impact, etc.Mylonite is heat resistant, impact resistant, pressure resistant whereas Siltstone is heat resistant, impact resistant, pressure resistant, water resistant.