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Hornfels
Hornfels

Tachylite
Tachylite



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Hornfels vs Tachylite

1 Definition
1.1 Definition
Hornfels is a metamorphic rock formed by the contact between mudstone or other clay rich rock, and a hot igneous body, and represents a heat altered equivalent of the original rock
Tachylite is a vitreous form of basaltic volcanic glass. This glass is formed naturally by the rapid cooling of molten basalt
1.2 History
1.2.1 Origin
New Zealand
Iceland
1.2.2 Discoverer
Unknown
Unknown
1.3 Etymology
From German which means hornstone
From German Tachylite, from tachy- + Greek lutos soluble, melting
1.4 Class
Metamorphic Rocks
Igneous Rocks
1.4.1 Sub-Class
Durable Rock, Soft Rock
Durable Rock, Medium Hardness Rock
1.5 Family
1.5.1 Group
Not Applicable
Volcanic
1.6 Other Categories
Fine Grained Rock, Opaque Rock
Coarse Grained Rock, Fine Grained Rock, Medium Grained Rock, Opaque Rock
2 Texture
2.1 Texture
Granular, Platy
Vitreous
2.2 Color
Brown, Dark Greenish - Grey, Green, Reddish Brown
Black, Dark Brown
2.3 Maintenance
Less
More
2.4 Durability
Durable
Durable
2.4.1 Water Resistant
81% Metamorphic Rocks Rocks have it !
81% Igneous Rocks Rocks have it !
2.4.2 Scratch Resistant
65% Metamorphic Rocks Rocks have it !
86% Igneous Rocks Rocks have it !
2.4.3 Stain Resistant
42% Metamorphic Rocks Rocks have it !
66% Igneous Rocks Rocks have it !
2.4.4 Wind Resistant
19% Metamorphic Rocks Rocks have it !
49% Igneous Rocks Rocks have it !
2.4.5 Acid Resistant
15% Metamorphic Rocks Rocks have it !
48% Igneous Rocks Rocks have it !
2.5 Appearance
Dull
Glassy
3 Uses
3.1 Architecture
3.1.1 Interior Uses
Decorative Aggregates, Flooring, Homes, Interior Decoration
Decorative Aggregates, Interior Decoration
3.1.2 Exterior Uses
As Building Stone, As Facing Stone, Garden Decoration, Office Buildings, Paving Stone
As Building Stone, As Facing Stone, Garden Decoration, Paving Stone
3.1.3 Other Architectural Uses
Curbing
Curbing
3.2 Industry
3.2.1 Construction Industry
for Road Aggregate, Roadstone
Cutting Tool, Knives, Landscaping, Scrapers
3.2.2 Medical Industry
Not Yet Used
Not Yet Used
3.3 Antiquity Uses
Artifacts, Monuments
Artifacts
3.4 Other Uses
3.4.1 Commercial Uses
Cemetery Markers, Commemorative Tablets, Creating Artwork
Cemetery Markers, Creating Artwork
4 Types
4.1 Types
Biotite hornfels
Not Available
4.2 Features
Smooth to touch
Available in Lots of Colors and Patterns, Clasts are smooth to touch, NA
4.3 Archaeological Significance
4.3.1 Monuments
Used
Not Yet Used
4.3.2 Famous Monuments
Data Not Available
Not Applicable
4.3.3 Sculpture
Not Yet Used
Not Yet Used
4.3.4 Famous Sculptures
Not Applicable
Not Applicable
4.3.5 Pictographs
Used
Used
4.3.6 Petroglyphs
Used
Used
4.3.7 Figurines
Not Yet Used
Not Yet Used
4.4 Fossils
Absent
Absent
5 Formation
5.1 Formation
Due to change in environmental conditions, rocks are heated and pressurized deep inside the Earth's surface. Hornfels is formed from the extreme heat caused by magma or by the intense collisions and friction of tectonic plates.
Tachylite 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.
5.2 Composition
5.2.1 Mineral Content
Andalusite
Feldspar, Olivine
5.2.2 Compound Content
Fe, Mg
Fe, Mg
5.3 Transformation
5.3.1 Metamorphism
50% Metamorphic Rocks Rocks have it !
97% Igneous Rocks Rocks have it !
5.3.2 Types of Metamorphism
Not Applicable
Burial Metamorphism, Cataclastic Metamorphism, Contact Metamorphism, Hydrothermal Metamorphism, Impact Metamorphism, Regional Metamorphism
5.3.3 Weathering
65% Metamorphic Rocks Rocks have it !
99% Igneous Rocks Rocks have it !
5.3.4 Types of Weathering
Biological Weathering
Biological Weathering, Chemical Weathering, Mechanical Weathering
5.3.5 Erosion
77% Metamorphic Rocks Rocks have it !
92% Igneous Rocks Rocks have it !
5.3.6 Types of Erosion
Chemical Erosion, Glacier Erosion, Sea Erosion, Water Erosion, Wind Erosion
Chemical Erosion, Sea Erosion, Water Erosion, Wind Erosion
6 Properties
6.1 Physical Properties
6.1.1 Hardness
2-3
5.5
6.1.2 Grain Size
Fine Grained
Medium to Fine Coarse Grained
6.1.3 Fracture
Conchoidal
Conchoidal
6.1.4 Streak
Unknown
Vermilion
6.1.5 Porosity
Highly Porous
Less Porous
6.1.6 Luster
Shiny
Resinous
6.1.7 Compressive Strength
Flint
5.80 N/mm2
Rank: 31 (Overall)
206.00 N/mm2
Rank: 8 (Overall)
Obsidian
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6.1.8 Cleavage
Perfect
Not Available
6.1.9 Toughness
Not Yet Found
Not Available
6.1.10 Specific Gravity
3.4-3.9
2.4
6.1.11 Transparency
Opaque
Opaque
6.1.12 Density
0.25-0.30 g/cm3
3.058 g/cm3
6.2 Thermal Properties
6.2.1 Specific Heat Capacity
Banded iron for..
0.84 kJ/Kg K
Rank: 15 (Overall)
0.56 kJ/Kg K
Rank: 22 (Overall)
Granulite
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6.2.2 Resistance
Heat Resistant, Impact Resistant, Pressure Resistant
Heat Resistant, Impact Resistant, Wear Resistant
7 Reserves
7.1 Deposits in Eastern Continents
7.1.1 Asia
Bangladesh, Bhutan, China, India, North Korea, Qatar, Russia, Saudi Arabia, South Korea, Thailand
Cambodia, Russia, South Korea
7.1.2 Africa
Cameroon, East Africa, Tanzania, Western Africa
East Africa
7.1.3 Europe
United Kingdom
England, Germany, Hungary, Iceland, Scotland, Sweden
7.1.4 Others
Not Yet Found
Hawaii Islands
7.2 Deposits in Western Continents
7.2.1 North America
Canada, USA
USA
7.2.2 South America
Bolivia, Brazil, Colombia, Ecuador
Not Yet Found
7.3 Deposits in Oceania Continent
7.3.1 Australia
New South Wales, New Zealand, Queensland, Western Australia
Victoria

Hornfels vs Tachylite 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 Hornfels and Tachylite Reserves. Hornfels is a metamorphic rock formed by the contact between mudstone or other clay rich rock, and a hot igneous body, and represents a heat altered equivalent of the original rock. Tachylite is a vitreous form of basaltic volcanic glass. This glass is formed naturally by the rapid cooling of molten basalt. 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 Hornfels vs Tachylite information and Hornfels vs Tachylite characteristics in the upcoming sections.

Hornfels vs Tachylite 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. Hornfels vs Tachylite characteristics assist us to distinguish and recognize rocks. Also you can check about Properties of Hornfels and Properties of Tachylite. Learn more about Hornfels vs Tachylite in the next section. The interior uses of Hornfels include Decorative aggregates, Flooring, Homes and Interior decoration whereas the interior uses of Tachylite include Decorative aggregates and Interior decoration. Due to some exceptional properties of Hornfels and Tachylite, they have various applications in construction industry. The uses of Hornfels in construction industry include For road aggregate, Roadstone and that of Tachylite include Cutting tool, Knives, Landscaping, Scrapers.

More about Hornfels and Tachylite

Here you can know more about Hornfels and Tachylite. The life cycle of a rock consists of formation of rock, composition of rock and transformation of rock. The composition of Hornfels and Tachylite consists of mineral content and compound content. The mineral content of Hornfels includes Andalusite and mineral content of Tachylite includes Feldspar, Olivine. You can also check out the list of all Metamorphic Rocks. When we have to compare Hornfels vs Tachylite, the texture, color and appearance plays an important role in determining the type of rock. Hornfels is available in brown, dark greenish - grey, green, reddish brown colors whereas, Tachylite is available in black, dark brown colors. Appearance of Hornfels is Dull and that of Tachylite is Glassy. Properties of rock is another aspect for Hornfels vs Tachylite. The hardness of Hornfels is 2-3 and that of Tachylite is 5.5. The types of Hornfels are Biotite hornfels whereas types of Tachylite are Not Available. Streak of rock is the color of powder produced when it is dragged across an unweathered surface. The streak of Hornfels is unknown while that of Tachylite is vermilion. The specific heat capacity of Hornfels is 0.84 kJ/Kg K and that of Tachylite is 0.56 kJ/Kg K. Depending on the properties like hardness, toughness, specific heat capacity, porosity etc., rocks are resistant to heat, wear, impact, etc.Hornfels is heat resistant, impact resistant, pressure resistant whereas Tachylite is heat resistant, impact resistant, wear resistant.