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Hornfels
Hornfels

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Hornfels vs Rhyolite

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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
Rhyolite is a fine-grained igneous rock which is rich in silica
1.2 History
1.2.1 Origin
New Zealand
North America
1.2.2 Discoverer
Unknown
Ferdinand von Richthofen
1.3 Etymology
From German which means hornstone
From German Rhyolit, from Greek rhuax lava stream + lithos stone
1.4 Class
Metamorphic Rocks
Igneous Rocks
1.4.1 Sub-Class
Durable Rock, Soft Rock
Durable Rock, Hard Rock
1.5 Family
1.5.1 Group
Not Applicable
Volcanic
1.6 Other Categories
Fine Grained Rock, Opaque Rock
Coarse Grained Rock, Opaque Rock
2 Texture
2.1 Texture
Granular, Platy
Aphanitic, Glassy, Porphyritic
2.2 Color
Brown, Dark Greenish - Grey, Green, Reddish Brown
Grey, White, Light Black
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
Banded
3 Uses
3.1 Architecture
3.1.1 Interior Uses
Decorative Aggregates, Flooring, Homes, Interior Decoration
Decorative Aggregates, Homes, Hotels, Interior Decoration, Kitchens
3.1.2 Exterior Uses
As Building Stone, As Facing Stone, Garden Decoration, Office Buildings, Paving Stone
As Building Stone, As Facing Stone, Paving Stone, Office Buildings
3.1.3 Other Architectural Uses
Curbing
Not Yet Used
3.2 Industry
3.2.1 Construction Industry
for Road Aggregate, Roadstone
Arrowheads, As Dimension Stone, Building houses or walls, Construction Aggregate, Cutting Tool, for Road Aggregate, Knives
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
Gemstone, Laboratory bench tops, Jewelry
4 Types
4.1 Types
Biotite hornfels
Pumice Rocks, Obsidian Rocks, Perlite Rocks, Porphyritic Rocks.
4.2 Features
Smooth to touch
Acidic in nature, Available in lots of colors
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
Not Used
4.3.6 Petroglyphs
Used
Not 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.
Rhyolite is a felsic extrusive rock and due to its high silica content, rhyolite lava is very viscous and is volcanic equivalent of granite.
5.2 Composition
5.2.1 Mineral Content
Andalusite
Biotite, Feldspar, Hornblade, Plagioclase, Pyroxene, Quartz
5.2.2 Compound Content
Fe, Mg
Ca, Fe, Potassium Oxide, Mg, Potassium, Silicon Dioxide, Sodium
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, 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
6-7
6.1.2 Grain Size
Fine Grained
Large and Coarse Grained
6.1.3 Fracture
Conchoidal
Sub-conchoidal
6.1.4 Streak
Unknown
Colorless
6.1.5 Porosity
Highly Porous
Highly Porous
6.1.6 Luster
Shiny
Earthy
6.1.7 Compressive Strength
Flint
5.80 N/mm2
Rank: 31 (Overall)
140.00 N/mm2
Rank: 15 (Overall)
Obsidian
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6.1.8 Cleavage
Perfect
Not Available
6.1.9 Toughness
Not Yet Found
2
6.1.10 Specific Gravity
3.4-3.9
2.65-2.67
6.1.11 Transparency
Opaque
Opaque
6.1.12 Density
0.25-0.30 g/cm3
2.4-2.6 g/cm3
6.2 Thermal Properties
6.2.1 Specific Heat Capacity
Banded iron for..
0.84 kJ/Kg K
Rank: 15 (Overall)
Not Available
Rank: N/A (Overall)
Granulite
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6.2.2 Resistance
Heat Resistant, Impact Resistant, Pressure Resistant
Heat 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
China, India
7.1.2 Africa
Cameroon, East Africa, Tanzania, Western Africa
Angola, Egypt, Madagascar, Namibia, Nigeria, South Africa
7.1.3 Europe
United Kingdom
Germany, Iceland, Ireland, Italy, Spain
7.1.4 Others
Not Yet Found
Not Yet Found
7.2 Deposits in Western Continents
7.2.1 North America
Canada, USA
Canada, USA
7.2.2 South America
Bolivia, Brazil, Colombia, Ecuador
Argentina, Bolivia, Chile, Colombia, Ecuador, Peru, Venezuela
7.3 Deposits in Oceania Continent
7.3.1 Australia
New South Wales, New Zealand, Queensland, Western Australia
New Zealand, Queensland, Western Australia

Hornfels vs Rhyolite 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 Rhyolite 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. Rhyolite is a fine-grained igneous rock which is rich in silica. 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 Rhyolite information and Hornfels vs Rhyolite characteristics in the upcoming sections.

Hornfels vs Rhyolite 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 Rhyolite characteristics assist us to distinguish and recognize rocks. Also you can check about Properties of Hornfels and Properties of Rhyolite. Learn more about Hornfels vs Rhyolite in the next section. The interior uses of Hornfels include Decorative aggregates, Flooring, Homes and Interior decoration whereas the interior uses of Rhyolite include Decorative aggregates, Homes, Hotels, Interior decoration and Kitchens. Due to some exceptional properties of Hornfels and Rhyolite, they have various applications in construction industry. The uses of Hornfels in construction industry include For road aggregate, Roadstone and that of Rhyolite include Arrowheads, As dimension stone, Building houses or walls, Construction aggregate, Cutting tool, For road aggregate, Knives.

More about Hornfels and Rhyolite

Here you can know more about Hornfels and Rhyolite. The life cycle of a rock consists of formation of rock, composition of rock and transformation of rock. The composition of Hornfels and Rhyolite consists of mineral content and compound content. The mineral content of Hornfels includes Andalusite and mineral content of Rhyolite includes Biotite, Feldspar, Hornblade, Plagioclase, Pyroxene, Quartz. You can also check out the list of all Metamorphic Rocks. When we have to compare Hornfels vs Rhyolite, 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, Rhyolite is available in grey, white, light black colors. Appearance of Hornfels is Dull and that of Rhyolite is Banded. Properties of rock is another aspect for Hornfels vs Rhyolite. The hardness of Hornfels is 2-3 and that of Rhyolite is 6-7. The types of Hornfels are Biotite hornfels whereas types of Rhyolite are Pumice Rocks, Obsidian Rocks, Perlite Rocks, Porphyritic Rocks.. 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 Rhyolite is colorless. The specific heat capacity of Hornfels is 0.84 kJ/Kg K and that of Rhyolite is Not Available. 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 Rhyolite is heat resistant, wear resistant.