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Adakite
Adakite

Hornfels
Hornfels



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Adakite vs Hornfels

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Definition

Definition

Adakite is an intermediate to felsic volcanic rock that has geochemical characteristics of magma which is said to be formed by partial melting of altered basalt that is subducted below volcanic arcs
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

Adak, Aleutian Islands
New Zealand

Discoverer

Defant and Drummond
Unknown

Etymology

From Adak, Aleutian Islands
From German which means hornstone

Class

Igneous Rocks
Metamorphic Rocks

Sub-Class

Durable Rock, Medium Hardness Rock
Durable Rock, Soft Rock

Family

Group

Volcanic
-

Other Categories

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

Texture

Texture

Porphyritic
Granular, Platy

Color

Black, Brown, Light to Dark 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

Dull and Soft
Dull

Uses

Architecture

Interior Uses

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

Exterior Uses

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

Other Architectural Uses

Whetstones
Curbing

Industry

Construction Industry

As Dimension Stone, Cobblestones, Rail Track Ballast, Roadstone
for Road Aggregate, Roadstone

Medical Industry

-
-

Antiquity Uses

Monuments, Sculpture, Small Figurines
Artifacts, Monuments

Other Uses

Commercial Uses

Commemorative Tablets, Pottery, Used in aquariums
Cemetery Markers, Commemorative Tablets, Creating Artwork

Types

Types

Intermediate volcanic rock
Biotite hornfels

Features

Has High structural resistance against erosion and climate, Host rock for Diamond, Very fine grained rock
Smooth to touch

Archaeological Significance

Monuments

-
-

Famous Monuments

-
-

Sculpture

-
-

Famous Sculptures

-
-

Pictographs

-
-

Petroglyphs

-
-

Figurines

-
-

Fossils

Absent
Absent

Formation

Formation

Adakite rocks are formed when the hydrous fluids are released from minerals that break down in metamorphosed basalt, and rise into the mantle they initiate partial melting.
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

Olivine, Plagioclase, Pyroxene
Andalusite

Compound Content

Aluminium Oxide, MgO, Silicon Dioxide
Fe, Mg

Transformation

Metamorphism

Types of Metamorphism

Cataclastic Metamorphism, Contact Metamorphism, Impact Metamorphism, Regional Metamorphism
-

Weathering

Types of Weathering

Chemical Weathering, Mechanical Weathering
Biological Weathering

Erosion

Types of Erosion

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

Properties

Physical Properties

Hardness

3-42-3
1 7
👆🏻

Grain Size

Fine to Medium Grained
Fine Grained

Fracture

Conchoidal
Conchoidal

Streak

Bluish Black
-

Porosity

Less Porous
Highly Porous

Luster

Grainy, Pearly and Vitreous
Shiny

Compressive Strength

200.00 N/mm25.80 N/mm2
0.15 450
👆🏻

Cleavage

-
Perfect

Toughness

-
-

Specific Gravity

-99993.4-3.9
0 8.4
👆🏻

Transparency

Opaque
Opaque

Density

-9999 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

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

Africa

Ethiopia, Somalia, South Africa
Cameroon, East Africa, Tanzania, Western Africa

Europe

Iceland
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

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

Adakite 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 Adakite and Hornfels Reserves. Adakite is an intermediate to felsic volcanic rock that has geochemical characteristics of magma which is said to be formed by partial melting of altered basalt that is subducted below volcanic arcs. 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 Adakite vs Hornfels information and Adakite vs Hornfels characteristics in the upcoming sections.

Adakite 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. Adakite vs Hornfels characteristics assist us to distinguish and recognize rocks. Also you can check about Properties of Adakite and Properties of Hornfels. Learn more about Adakite vs Hornfels in the next section. The interior uses of Adakite include Decorative aggregates, Floor tiles, Homes, Hotels and Kitchens whereas the interior uses of Hornfels include Decorative aggregates, Flooring, Homes and Interior decoration. Due to some exceptional properties of Adakite and Hornfels, they have various applications in construction industry. The uses of Adakite in construction industry include As dimension stone, Cobblestones, Rail track ballast, Roadstone and that of Hornfels include For road aggregate, Roadstone.

More about Adakite and Hornfels

Here you can know more about Adakite and Hornfels. The life cycle of a rock consists of formation of rock, composition of rock and transformation of rock. The composition of Adakite and Hornfels consists of mineral content and compound content. The mineral content of Adakite includes Olivine, Plagioclase, Pyroxene and mineral content of Hornfels includes Andalusite. You can also check out the list of all Igneous Rocks. When we have to compare Adakite vs Hornfels, the texture, color and appearance plays an important role in determining the type of rock. Adakite is available in black, brown, light to dark grey colors whereas, Hornfels is available in brown, dark greenish - grey, green, reddish brown colors. Appearance of Adakite is Dull and Soft and that of Hornfels is Dull. Properties of rock is another aspect for Adakite vs Hornfels. The hardness of Adakite is 3-4 and that of Hornfels is 2-3. The types of Adakite are Intermediate volcanic rock 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 Adakite is bluish black while that of Hornfels is . The specific heat capacity of Adakite 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.Adakite is heat resistant, pressure resistant, wear resistant whereas Hornfels is heat resistant, impact resistant, pressure resistant.