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Icelandite
Icelandite

Dacite
Dacite



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Icelandite
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Dacite

Icelandite vs Dacite

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Definition

Definition

Icelandite belongs to volcanic igneous rocks which is rich in iron and belongs to andesite rock
Dacite is a volcanic igneous rock which is rintermediate in composition between andesite and rhyolite

History

Origin

Iceland
Romania and Moldova, Europe

Discoverer

Ian S. E. Carmichael
Unknown

Etymology

From its origin place near Cenozoic volcano near the parsonage Þingmúli in East Iceland
From Dacia, a province of the Roman Empire which lay between the Danube River and Carpathian Mountains where the rock was first described

Class

Igneous Rocks
Igneous Rocks

Sub-Class

Durable Rock, Hard Rock
Durable Rock, Soft Rock

Family

Group

Volcanic
Volcanic

Other Categories

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

Texture

Texture

Aphanitic to Porphyritic
Aphanitic to Porphyritic

Color

Bluish - Grey, Grey, Pink, Yellow
Bluish - Grey, Brown, Grey, Light to Dark Grey

Maintenance

More
Less

Durability

Durable
Durable

Water Resistant

Scratch Resistant

Stain Resistant

Wind Resistant

Acid Resistant

Appearance

Dull and Soft
Vesicular

Uses

Architecture

Interior Uses

Decorative Aggregates, Floor Tiles, Homes, Interior Decoration, Kitchens
Decorative Aggregates, Entryways, Interior Decoration

Exterior Uses

Office Buildings, Roof Tiles
As Building Stone, Paving Stone, Garden Decoration

Other Architectural Uses

Curbing
Curbing

Industry

Construction Industry

Cobblestones, Construction Aggregate, for Road Aggregate
As Dimension Stone, Construction Aggregate, for Road Aggregate, Landscaping

Medical Industry

-
-

Antiquity Uses

Artifacts, Jewellery, Sculpture, Small Figurines
Artifacts

Other Uses

Commercial Uses

Cemetery Markers, Creating Artwork
Commemorative Tablets, Creating Artwork

Types

Types

Intermediate volcanic rock
Footwall Dacite, Hanging wall Dacite, Tuff and Biotite Dacite

Features

Generally rough to touch, High silica content, Is one of the oldest rock
Host Rock for Lead, Is one of the oldest rock

Archaeological Significance

Monuments

-
-

Famous Monuments

-
-

Sculpture

-
-

Famous Sculptures

-
-

Pictographs

-
-

Petroglyphs

-
-

Figurines

-
-

Fossils

Absent
Absent

Formation

Formation

Icelandite 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.
Dacitic magma is formed by the subduction of young oceanic crust under a thick felsic continental plate. Further, the Oceanic crust is hydrothermally altered as quartz and sodium are added.

Composition

Mineral Content

Amphibole, Apatite, Biotite, Feldspar, Garnet, Hornblade, Ilmenite, Magnetite, Plagioclase, Pyroxene, Quartz, Zircon
Amphibole, Apatite, Biotite, Feldspar, Garnet, Hornblade, Magnetite, Plagioclase, Pyroxene, Quartz, Zircon

Compound Content

Silicon Dioxide
Ca, Fe, Potassium Oxide, Mg, Potassium, Silicon Dioxide

Transformation

Metamorphism

Types of Metamorphism

Burial Metamorphism, Cataclastic Metamorphism, Contact Metamorphism, Hydrothermal Metamorphism, Impact Metamorphism, Regional Metamorphism
Burial Metamorphism, Cataclastic Metamorphism

Weathering

Types of Weathering

Biological Weathering
Biological Weathering, Chemical Weathering, Mechanical Weathering

Erosion

Types of Erosion

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

Properties

Physical Properties

Hardness

72-2.25
1 7
👆🏻

Grain Size

Very fine-grained
Medium to Fine Coarse Grained

Fracture

Uneven
Conchoidal

Streak

White
White

Porosity

Less Porous
Less Porous

Luster

Vitreous
Subvitreous to Dull

Compressive Strength

200.00 N/mm270.00 N/mm2
0.15 450
👆🏻

Cleavage

-
Perfect

Toughness

1.1
-

Specific Gravity

2.5-2.82.86-2.87
0 8.4
👆🏻

Transparency

Opaque
Translucent

Density

2.11-2.36 g/cm32.77-2.771 g/cm3
0 1400
👆🏻

Thermal Properties

Specific Heat Capacity

2.39 kJ/Kg K0.92 kJ/Kg K
0.14 3.2
👆🏻

Resistance

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

Reserves

Deposits in Eastern Continents

Asia

India, Indonesia, Japan, Nepal, South Korea
-

Africa

Egypt, Ethiopia, Morocco, Namibia, South Africa, Tanzania
-

Europe

Austria, Finland, Germany, Italy, Romania, Turkey, United Kingdom
France, Greece, Romania, Scotland, Spain

Others

-
-

Deposits in Western Continents

North America

Mexico, USA
USA

South America

Argentina, Bolivia, Chile, Colombia, Ecuador, Peru, Venezuela
Argentina, Bolivia, Chile, Colombia, Ecuador, Peru, Venezuela

Deposits in Oceania Continent

Australia

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

Icelandite vs Dacite 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 Icelandite and Dacite Reserves. Icelandite belongs to volcanic igneous rocks which is rich in iron and belongs to andesite rock. Dacite is a volcanic igneous rock which is rintermediate in composition between andesite and rhyolite. 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 Icelandite vs Dacite information and Icelandite vs Dacite characteristics in the upcoming sections.

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

More about Icelandite and Dacite

Here you can know more about Icelandite and Dacite. The life cycle of a rock consists of formation of rock, composition of rock and transformation of rock. The composition of Icelandite and Dacite consists of mineral content and compound content. The mineral content of Icelandite includes Amphibole, Apatite, Biotite, Feldspar, Garnet, Hornblade, Ilmenite, Magnetite, Plagioclase, Pyroxene, Quartz, Zircon and mineral content of Dacite includes Amphibole, Apatite, Biotite, Feldspar, Garnet, Hornblade, Magnetite, Plagioclase, Pyroxene, Quartz, Zircon. You can also check out the list of all Igneous Rocks. When we have to compare Icelandite vs Dacite, the texture, color and appearance plays an important role in determining the type of rock. Icelandite is available in bluish - grey, grey, pink, yellow colors whereas, Dacite is available in bluish - grey, brown, grey, light to dark grey colors. Appearance of Icelandite is Dull and Soft and that of Dacite is Vesicular. Properties of rock is another aspect for Icelandite vs Dacite. The hardness of Icelandite is 7 and that of Dacite is 2-2.25. The types of Icelandite are Intermediate volcanic rock whereas types of Dacite are Footwall Dacite, Hanging wall Dacite, Tuff and Biotite Dacite. Streak of rock is the color of powder produced when it is dragged across an unweathered surface. The streak of Icelandite and Dacite is white. The specific heat capacity of Icelandite is 2.39 kJ/Kg K and that of Dacite 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.Icelandite is heat resistant, pressure resistant, scratch resistant, wear resistant whereas Dacite is heat resistant, impact resistant, pressure resistant, wear resistant.