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Dacite
Dacite

Metapelite
Metapelite



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Dacite and Metapelite

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1 Definition
1.1 Definition
Dacite is a volcanic igneous rock which is rintermediate in composition between andesite and rhyolite
Metapelite is an old and currently not widely used field geological term for a clay rich fine-grained clastic sediment or sedimentary rock, i.e. mud or a mudstone
1.2 History
1.2.1 Origin
Romania and Moldova, Europe
Unknown
1.2.2 Discoverer
Unknown
Unknown
1.3 Etymology
From Dacia, a province of the Roman Empire which lay between the Danube River and Carpathian Mountains where the rock was first described
From Pelos or clay in Greek
1.4 Class
Igneous Rocks
Metamorphic Rocks
1.4.1 Sub-Class
Durable Rock, Soft Rock
Durable Rock, Medium Hardness Rock
1.5 Family
1.5.1 Group
Volcanic
Not Applicable
1.6 Other Categories
Fine Grained Rock, Medium Grained Rock, Opaque Rock
Coarse Grained Rock, Fine Grained Rock, Medium Grained Rock, Opaque Rock
2 Texture
2.1 Texture
Aphanitic to Porphyritic
Foliated
2.2 Color
Bluish - Grey, Brown, Grey, Light to Dark Grey
Dark Greenish - Grey, Green, Light Green, Light Greenish Grey
2.3 Maintenance
Less
Less
2.4 Durability
Durable
Durable
2.4.1 Water Resistant
2.4.2 Scratch Resistant
2.4.3 Stain Resistant
2.4.4 Wind Resistant
2.4.5 Acid Resistant
2.5 Appearance
Vesicular
Banded
3 Uses
3.1 Architecture
3.1.1 Interior Uses
Decorative Aggregates, Entryways, Interior Decoration
Decorative Aggregates, Interior Decoration
3.1.2 Exterior Uses
As Building Stone, Paving Stone, Garden Decoration
As Building Stone, As Facing Stone
3.1.3 Other Architectural Uses
Curbing
Curbing
3.2 Industry
3.2.1 Construction Industry
As Dimension Stone, Construction Aggregate, for Road Aggregate, Landscaping
Cement Manufacture, Construction Aggregate, for Road Aggregate
3.2.2 Medical Industry
Not Yet Used
Not Yet Used
3.3 Antiquity Uses
Artifacts
Artifacts
3.4 Other Uses
3.4.1 Commercial Uses
Commemorative Tablets, Creating Artwork
Commemorative Tablets, Creating Artwork
4 Types
4.1 Types
Footwall Dacite, Hanging wall Dacite, Tuff and Biotite Dacite
Not Available
4.2 Features
Host Rock for Lead, Is one of the oldest rock
Easily splits into thin plates, It is One of the Oldest, Strongest and Hardest Rock
4.3 Archaeological Significance
4.3.1 Monuments
Not Yet Used
Not Yet Used
4.3.2 Famous Monuments
Not Applicable
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
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.
Due to change in environmental conditions, rocks are heated and pressurized deep inside the Earth's surface. Metapelite is formed from the extreme heat caused by magma or by the intense collisions and friction of tectonic plates.
5.2 Composition
5.2.1 Mineral Content
Amphibole, Apatite, Biotite, Feldspar, Garnet, Hornblade, Magnetite, Plagioclase, Pyroxene, Quartz, Zircon
Albite, Chlorite, Quartz
5.2.2 Compound Content
Ca, Fe, Potassium Oxide, Mg, Potassium, Silicon Dioxide
Aluminium Oxide, CaO, MgO
5.3 Transformation
5.3.1 Metamorphism
5.3.2 Types of Metamorphism
Burial Metamorphism, Cataclastic Metamorphism
Not Applicable
5.3.3 Weathering
5.3.4 Types of Weathering
Biological Weathering, Chemical Weathering, Mechanical Weathering
Biological Weathering, Chemical Weathering, Mechanical Weathering
5.3.5 Erosion
5.3.6 Types of Erosion
Chemical Erosion
Chemical Erosion, Coastal Erosion, Water Erosion, Wind Erosion
6 Properties
6.1 Physical Properties
6.1.1 Hardness
2-2.255-6
Coal
1 7
6.1.2 Grain Size
Medium to Fine Coarse Grained
Medium to Fine Coarse Grained
6.1.3 Fracture
Conchoidal
Fibrous
6.1.4 Streak
White
Unknown
6.1.5 Porosity
Less Porous
Highly Porous
6.1.6 Luster
Subvitreous to Dull
Earthy
6.1.7 Compressive Strength
NANA
What Is Obsidian
0.15 450
6.1.8 Cleavage
Perfect
Not Available
6.1.9 Toughness
Not Available
Not Available
6.1.10 Specific Gravity
2.86-2.873.4-3.7
Granite
0 8.4
6.1.11 Transparency
Translucent
Opaque
6.1.12 Density
2.77-2.771 g/cm30-300 g/cm3
Granite
0 1400
6.2 Thermal Properties
6.2.1 Specific Heat Capacity
0.92 kJ/Kg K0.72 kJ/Kg K
What Is Granulite
0.14 3.2
6.2.2 Resistance
Heat Resistant, Impact Resistant, Pressure Resistant, Wear Resistant
Heat Resistant, Impact Resistant, Pressure Resistant
7 Reserves
7.1 Deposits in Eastern Continents
7.1.1 Asia
Not Yet Found
Not Yet Found
7.1.2 Africa
Not Yet Found
Western Africa
7.1.3 Europe
France, Greece, Romania, Scotland, Spain
United Kingdom
7.1.4 Others
Not Yet Found
Not Yet Found
7.2 Deposits in Western Continents
7.2.1 North America
USA
Not Available
7.2.2 South America
Argentina, Bolivia, Chile, Colombia, Ecuador, Peru, Venezuela
Brazil, Colombia, Ecuador
7.3 Deposits in Oceania Continent
7.3.1 Australia
New Zealand, South Australia, Western Australia
Central Australia, Western Australia

All about Dacite and Metapelite Properties

Know all about Dacite and Metapelite properties here. All properties of rocks are important as they define the type of rock and its application. Dacite belongs to Igneous Rocks while Metapelite belongs to Metamorphic Rocks.Texture of Dacite is Aphanitic to Porphyritic whereas that of Metapelite is Foliated. Dacite appears Vesicular and Metapelite appears Banded. The luster of Dacite is subvitreous to dull while that of Metapelite is earthy. Dacite is available in bluish - grey, brown, grey, light to dark grey colors whereas Metapelite is available in dark greenish - grey, green, light green, light greenish grey colors. The commercial uses of Dacite and Metapelite are commemorative tablets, creating artwork.