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Chalk
Chalk

Pseudotachylite
Pseudotachylite



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Pseudotachylite

Chalk vs Pseudotachylite

1 Definition
1.1 Definition
Chalk is a soft, white, powdery limestone consisting mainly of fossil shells of foraminifers
Very fine grained fault rock which is composed of glassy matrix that often contains inclusions of wall-rock fragments.
1.2 History
1.2.1 Origin
Unknown
USA
1.2.2 Discoverer
Unknown
Unknown
1.3 Etymology
From old English cealc chalk, lime, plaster; pebble, from Greek khalix small pebble, in English transferred to the opaque, white, soft limestone
From pseudo- +‎ tachylite, a glassy rock generated by frictional heat within faults.
1.4 Class
Sedimentary Rocks
Metamorphic Rocks
1.4.1 Sub-Class
Durable Rock, Soft Rock
Durable Rock, Hard Rock
1.5 Family
1.5.1 Group
Not Applicable
Not Applicable
1.6 Other Categories
Fine Grained Rock, Opaque Rock
Fine Grained Rock, Opaque Rock
2 Texture
2.1 Texture
Clastic or Non-Clastic
Quench
2.2 Color
Grey, White, Yellow
Black, Brown, Colourless, Green, Grey, Pink, White
2.3 Maintenance
Less
Less
2.4 Durability
Durable
Durable
2.4.1 Water Resistant
59% Sedimentary Rocks Rocks have it !
81% Metamorphic Rocks Rocks have it !
2.4.2 Scratch Resistant
62% Sedimentary Rocks Rocks have it !
65% Metamorphic Rocks Rocks have it !
2.4.3 Stain Resistant
43% Sedimentary Rocks Rocks have it !
42% Metamorphic Rocks Rocks have it !
2.4.4 Wind Resistant
38% Sedimentary Rocks Rocks have it !
19% Metamorphic Rocks Rocks have it !
2.4.5 Acid Resistant
22% Sedimentary Rocks Rocks have it !
15% Metamorphic Rocks Rocks have it !
2.5 Appearance
Soft
Dull and Soft
3 Uses
3.1 Architecture
3.1.1 Interior Uses
Decorative Aggregates, Homes, Interior Decoration
Decorative Aggregates, Entryways, Interior Decoration
3.1.2 Exterior Uses
As Building Stone, As Facing Stone, Paving Stone, Garden Decoration
As Building Stone, As Facing Stone, Garden Decoration
3.1.3 Other Architectural Uses
Powder
Curbing
3.2 Industry
3.2.1 Construction Industry
As Dimension Stone, Cement Manufacture, Construction Aggregate, for Road Aggregate, Making natural cement, raw material for manufacture of quicklime and slaked lime, Source of calcium
As Dimension Stone, Cement Manufacture, for Road Aggregate, Making natural cement
3.2.2 Medical Industry
Not Yet Used
Not Yet Used
3.3 Antiquity Uses
Artifacts, Monuments, Sculpture, Small Figurines
Artifacts, Monuments
3.4 Other Uses
3.4.1 Commercial Uses
Alumina Refineries, Creating Artwork, Drawing on blackboards, Gymnasts, athletes and mountain climbers use for grip, In aquifers, Paper Industry, Production of Lime, Raw material for manufacture of quicklime, slaked lime, Soil Conditioner, Whiting, Whiting material in toothpaste, paint and paper
Creating Artwork, Gemstone
4 Types
4.1 Types
Not Available
Not Available
4.2 Features
Clasts are smooth to touch, Is one of the oldest rock, Smooth to touch, Very fine grained rock
Host Rock for Lead
4.3 Archaeological Significance
4.3.1 Monuments
Used
Used
4.3.2 Famous Monuments
Data Not Available
Data Not Available
4.3.3 Sculpture
Used
Not Yet Used
4.3.4 Famous Sculptures
Data Not Available
Not Applicable
4.3.5 Pictographs
Used
Not Used
4.3.6 Petroglyphs
Used
Not Used
4.3.7 Figurines
Used
Not Yet Used
4.4 Fossils
Present
Absent
5 Formation
5.1 Formation
Chalk is formed from lime mud, which accumulates on the sea floor which is then transformed into rock by geological processes.
Due to change in environmental conditions, rocks are heated and pressurized deep inside the Earth's surface. Pseudotachylite is formed from the extreme heat caused by magma or by the intense collisions and friction of tectonic plates.
5.2 Composition
5.2.1 Mineral Content
Calcite, Clay, Clay Minerals, Quartz, Sand
Iron Oxides, Pyroxene, Quartz, Stishovite, Sulfides
5.2.2 Compound Content
Ca, NaCl, CaO
Carbon Dioxide, Silicon Dioxide, Sulfur Dioxide, Sulphur
5.3 Transformation
5.3.1 Metamorphism
19% Sedimentary Rocks Rocks have it !
50% Metamorphic Rocks Rocks have it !
5.3.2 Types of Metamorphism
Not Applicable
Burial Metamorphism, Cataclastic Metamorphism, Contact Metamorphism
5.3.3 Weathering
78% Sedimentary Rocks Rocks have it !
65% Metamorphic Rocks Rocks have it !
5.3.4 Types of Weathering
Biological Weathering, Chemical Weathering
Not Applicable
5.3.5 Erosion
86% Sedimentary Rocks Rocks have it !
77% Metamorphic Rocks Rocks have it !
5.3.6 Types of Erosion
Chemical Erosion, Coastal Erosion, Water Erosion
Not Applicable
6 Properties
6.1 Physical Properties
6.1.1 Hardness
1
7
6.1.2 Grain Size
Very fine-grained
Very fine-grained
6.1.3 Fracture
Not Available
Uneven
6.1.4 Streak
White
Light to dark brown
6.1.5 Porosity
Highly Porous
Less Porous
6.1.6 Luster
Dull
Vitreous
6.1.7 Compressive Strength
Flint
Not Available
Rank: N/A (Overall)
60.00 N/mm2
Rank: 25 (Overall)
Obsidian
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6.1.8 Cleavage
Non-Existent
Irregular
6.1.9 Toughness
1
Not Available
6.1.10 Specific Gravity
2.3-2.4
2.46-2.86
6.1.11 Transparency
Opaque
Transparent to Translucent
6.1.12 Density
2.49-2.50 g/cm3
2.7-2.9 g/cm3
6.2 Thermal Properties
6.2.1 Specific Heat Capacity
Banded iron for..
0.90 kJ/Kg K
Rank: 12 (Overall)
0.92 kJ/Kg K
Rank: 10 (Overall)
Granulite
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6.2.2 Resistance
Heat Resistant
Heat Resistant
7 Reserves
7.1 Deposits in Eastern Continents
7.1.1 Asia
Brunei, India, Indonesia, Malaysia, Singapore, Thailand, Vietnam
South Korea
7.1.2 Africa
Cameroon, Chad, Ghana, Kenya, Malawi, Sudan, Tanzania, Togo, Zambia, Zimbabwe
Western Africa
7.1.3 Europe
England, France, Germany, Spain, United Kingdom
Great Britain, Switzerland
7.1.4 Others
Not Yet Found
Not Yet Found
7.2 Deposits in Western Continents
7.2.1 North America
Canada, USA
Not Yet Found
7.2.2 South America
Colombia
Not Yet Found
7.3 Deposits in Oceania Continent
7.3.1 Australia
Adelaide, New Zealand, Queensland, Tonga, Victoria, Yorke Peninsula
Central Australia, Western Australia

Chalk vs Pseudotachylite Information

Earth’s outer layer is covered by rocks and these rocks have different physical and chemical properties. As two rocks are not same, it’s fun to compare them. You can also know more about Chalk and Pseudotachylite Reserves. Chalk is a soft, white, powdery limestone consisting mainly of fossil shells of foraminifers. Very fine grained fault rock which is composed of glassy matrix that often contains inclusions of wall-rock fragments.. These rocks are composed of many distinct minerals. The process of formation of rocks is different for various rocks. Rocks are quarried from many years for various purposes. You can check out Chalk vs Pseudotachylite information and Chalk vs Pseudotachylite characteristics in the upcoming sections.

Chalk vs Pseudotachylite 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. Chalk vs Pseudotachylite characteristics assist us to distinguish and recognize rocks. Also you can check about Properties of Chalk and Properties of Pseudotachylite. Learn more about Chalk vs Pseudotachylite in the next section. The interior uses of Chalk include Decorative aggregates, Homes and Interior decoration whereas the interior uses of Pseudotachylite include Decorative aggregates, Entryways and Interior decoration. Due to some exceptional properties of Chalk and Pseudotachylite, they have various applications in construction industry. The uses of Chalk in construction industry include As dimension stone, Cement manufacture, Construction aggregate, For road aggregate, Making natural cement, Raw material for manufacture of quicklime and slaked lime, Source of calcium and that of Pseudotachylite include As dimension stone, Cement manufacture, For road aggregate, Making natural cement.

More about Chalk and Pseudotachylite

Here you can know more about Chalk and Pseudotachylite. The life cycle of a rock consists of formation of rock, composition of rock and transformation of rock. The composition of Chalk and Pseudotachylite consists of mineral content and compound content. The mineral content of Chalk includes Calcite, Clay, Clay Minerals, Quartz, Sand and mineral content of Pseudotachylite includes Iron Oxides, Pyroxene, Quartz, Stishovite, Sulfides. You can also check out the list of all Sedimentary Rocks. When we have to compare Chalk vs Pseudotachylite, the texture, color and appearance plays an important role in determining the type of rock. Chalk is available in grey, white, yellow colors whereas, Pseudotachylite is available in black, brown, colourless, green, grey, pink, white colors. Appearance of Chalk is Soft and that of Pseudotachylite is Dull and Soft. Properties of rock is another aspect for Chalk vs Pseudotachylite. The hardness of Chalk is 1 and that of Pseudotachylite is 7. The types of Chalk are Not Available whereas types of Pseudotachylite are Not Available. Streak of rock is the color of powder produced when it is dragged across an unweathered surface. The streak of Chalk is white while that of Pseudotachylite is light to dark brown. The specific heat capacity of Chalk is 0.90 kJ/Kg K and that of Pseudotachylite is 0.92 kJ/Kg K. Depending on the properties like hardness, toughness, specific heat capacity, porosity etc., rocks are resistant to heat, wear, impact, etc.Chalk is heat resistant whereas Pseudotachylite is heat resistant.