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Amphibolite
Amphibolite

Hornfels
Hornfels



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Amphibolite
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Hornfels

Amphibolite vs Hornfels

Definition

Definition

Amphibolite can be defined as a granular metamorphic rock which mainly consist of hornblende and plagioclase
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

History

Origin

-
New Zealand

Discoverer

Alexandre Brongniart
Unknown

Etymology

From Amphibole + -ite
From German which means hornstone

Class

Metamorphic Rocks
Metamorphic Rocks

Sub-Class

Durable Rock, Hard Rock
Durable Rock, Soft Rock

Family

Group

-
-

Other Categories

Coarse Grained Rock, Medium Grained Rock, Opaque Rock
Fine Grained Rock, Opaque Rock

Texture

Texture

Banded, Foliated, Massive
Granular, Platy

Color

Black, Brown, Green, Grey
Brown, Dark Greenish - Grey, Green, Reddish Brown

Maintenance

Less
Less

Durability

Durable
Durable

Water Resistant

Scratch Resistant

Stain Resistant

Wind Resistant

Acid Resistant

Appearance

Foliated
Dull

Uses

Architecture

Interior Uses

Countertops, Decorative Aggregates, Entryways, Floor Tiles, Flooring, Homes, Hotels, Kitchens
Decorative Aggregates, Flooring, Homes, Interior Decoration

Exterior Uses

As Building Stone, As Facing Stone, Paving Stone, Office Buildings
As Building Stone, As Facing Stone, Garden Decoration, Office Buildings, Paving Stone

Other Architectural Uses

Curbing
Curbing

Industry

Construction Industry

As Dimension Stone, Building houses or walls, Cobblestones, Construction Aggregate, for Road Aggregate, Landscaping, Production of Glass and Ceramics, Roadstone
for Road Aggregate, Roadstone

Medical Industry

-
-

Antiquity Uses

Artifacts, Sculpture, Small Figurines
Artifacts, Monuments

Other Uses

Commercial Uses

Cemetery Markers, Commemorative Tablets, Creating Artwork
Cemetery Markers, Commemorative Tablets, Creating Artwork

Types

Types

Hornblendite
Biotite hornfels

Features

Clasts are smooth to touch, Matrix variable, Surfaces are often shiny
Smooth to touch

Archaeological Significance

Monuments

-
-

Famous Monuments

-
-

Sculpture

-
-

Famous Sculptures

-
-

Pictographs

-
-

Petroglyphs

-
-

Figurines

-
-

Fossils

Absent
Absent

Formation

Formation

Amphibolite is a coarse-grained metamorphic rock which forms by metamorphism of mafic igneous rocks like basalt and gabbro or from the metamorphism of clay-rich sedimentary rocks like marl or graywacke.
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.

Composition

Mineral Content

Amphibole, Andalusite, Biotite, Calcite, Epidote, Garnet, Hornblade, Kyanite, Magnetite, Olivine, Plagioclase, Pyroxene, Staurolite, Wollastonite
Andalusite

Compound Content

Aluminium Oxide, CaO, Iron(III) Oxide, FeO, Potassium Oxide, MgO, MnO, Sodium Oxide, Phosphorus Pentoxide, Silicon Dioxide, Titanium Dioxide
Fe, Mg

Transformation

Metamorphism

Types of Metamorphism

-
-

Weathering

Types of Weathering

Chemical Weathering, Mechanical Weathering
Biological Weathering

Erosion

Types of Erosion

Chemical Erosion, Glacier Erosion, Sea Erosion, Wind Erosion
Chemical Erosion, Glacier Erosion, Sea Erosion, Water Erosion, Wind Erosion

Properties

Physical Properties

Hardness

6-72-3
1 7
👆🏻

Grain Size

Medium to Coarse Grained
Fine Grained

Fracture

Irregular to Conchoidal
Conchoidal

Streak

White to Grey
-

Porosity

Less Porous
Highly Porous

Luster

Vitreous to Dull
Shiny

Compressive Strength

90.00 N/mm25.80 N/mm2
0.15 450
👆🏻

Cleavage

-
Perfect

Toughness

2.3
-

Specific Gravity

2.53.4-3.9
0 8.4
👆🏻

Transparency

Opaque
Opaque

Density

2.85-3.07 g/cm30.25-0.30 g/cm3
0 1400
👆🏻

Thermal Properties

Specific Heat Capacity

0.84 kJ/Kg K0.84 kJ/Kg K
0.14 3.2
👆🏻

Resistance

Heat Resistant, Pressure Resistant, Wear Resistant
Heat Resistant, Impact Resistant, Pressure Resistant

Reserves

Deposits in Eastern Continents

Asia

Russia, Turkey
Bangladesh, Bhutan, China, India, North Korea, Qatar, Russia, Saudi Arabia, South Korea, Thailand

Africa

Burundi, Djibouti, Eritrea, Ethiopia, Kenya, Madagascar, Rwanda, Somalia, South Africa, Sudan, Tanzania, Uganda
Cameroon, East Africa, Tanzania, Western Africa

Europe

Germany, Greece, Iceland, Norway, Poland
United Kingdom

Others

-
-

Deposits in Western Continents

North America

Canada, USA
Canada, USA

South America

Brazil
Bolivia, Brazil, Colombia, Ecuador

Deposits in Oceania Continent

Australia

South Australia, Western Australia
New South Wales, New Zealand, Queensland, Western Australia

Amphibolite vs Hornfels 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 Amphibolite and Hornfels Reserves. Amphibolite can be defined as a granular metamorphic rock which mainly consist of hornblende and plagioclase. 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. 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 Amphibolite vs Hornfels information and Amphibolite vs Hornfels characteristics in the upcoming sections.

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

More about Amphibolite and Hornfels

Here you can know more about Amphibolite and Hornfels. The life cycle of a rock consists of formation of rock, composition of rock and transformation of rock. The composition of Amphibolite and Hornfels consists of mineral content and compound content. The mineral content of Amphibolite includes Amphibole, Andalusite, Biotite, Calcite, Epidote, Garnet, Hornblade, Kyanite, Magnetite, Olivine, Plagioclase, Pyroxene, Staurolite, Wollastonite and mineral content of Hornfels includes Andalusite. You can also check out the list of all Igneous Rocks. When we have to compare Amphibolite vs Hornfels, the texture, color and appearance plays an important role in determining the type of rock. Amphibolite is available in black, brown, green, grey colors whereas, Hornfels is available in brown, dark greenish - grey, green, reddish brown colors. Appearance of Amphibolite is Foliated and that of Hornfels is Dull. Properties of rock is another aspect for Amphibolite vs Hornfels. The hardness of Amphibolite is 6-7 and that of Hornfels is 2-3. The types of Amphibolite are Hornblendite whereas types of Hornfels are Biotite hornfels. Streak of rock is the color of powder produced when it is dragged across an unweathered surface. The streak of Amphibolite is white to grey while that of Hornfels is . The specific heat capacity of Amphibolite is 0.84 kJ/Kg K and that of Hornfels is 0.84 kJ/Kg K. Depending on the properties like hardness, toughness, specific heat capacity, porosity etc., rocks are resistant to heat, wear, impact, etc.Amphibolite is heat resistant, pressure resistant, wear resistant whereas Hornfels is heat resistant, impact resistant, pressure resistant.