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Phyllite
Phyllite

Dacite
Dacite



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Phyllite
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Dacite

Phyllite vs Dacite

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Definition

Definition

Phyllite is a fine-grained metamorphic rock with a well-developed laminar structure, and is intermediate between slate and schist rocks
Dacite is a volcanic igneous rock which is rintermediate in composition between andesite and rhyolite

History

Origin

Unknown
Romania and Moldova, Europe

Discoverer

Unknown
Unknown

Etymology

From Greek phullon leaf + -ite1
From Dacia, a province of the Roman Empire which lay between the Danube River and Carpathian Mountains where the rock was first described

Class

Metamorphic Rocks
Igneous Rocks

Sub-Class

Durable Rock, Soft Rock
Durable Rock, Soft Rock

Family

Group

Not Applicable
Volcanic

Other Categories

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

Texture

Texture

Phyllitic Sheen, Slaty
Aphanitic to Porphyritic

Color

Black to Grey, Light Greenish Grey
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

Crinkled or Wavy
Vesicular

Uses

Architecture

Interior Uses

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

Exterior Uses

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

Other Architectural Uses

Curbing
Curbing

Industry

Construction Industry

As Dimension Stone, Building houses or walls, Cement Manufacture, Construction Aggregate, for Road Aggregate, Raw material for the manufacture of mortar, Roadstone
As Dimension Stone, Construction Aggregate, for Road Aggregate, Landscaping

Medical Industry

Not Available
Not Available

Antiquity Uses

Artifacts, Sculpture
Artifacts

Other Uses

Commercial Uses

Cemetery Markers, Commemorative Tablets, Creating Artwork, Writing Slates
Commemorative Tablets, Creating Artwork

Types

Types

Not Available
Footwall Dacite, Hanging wall Dacite, Tuff and Biotite Dacite

Features

Easily splits into thin plates, Is one of the oldest rock, Surfaces are often shiny
Host Rock for Lead, Is one of the oldest rock

Archaeological Significance

Monuments

Not Yet Used
Not Yet Used

Famous Monuments

Not Applicable
Not Applicable

Sculpture

Used
Not Yet Used

Famous Sculptures

Not Available
Not Applicable

Pictographs

Used
Used

Petroglyphs

Used
Used

Figurines

Used
Not Yet Used

Fossils

Absent
Absent

Formation

Formation

Phyllite is a metamorphic rock which is formed by regional metamorphism of argillaceous sediments since their cleavage arose due to deviatoric stress.
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

Albite, Alusite, Amphibole, Apatite, Biotite, Chlorite, Epidote, Feldspar, Garnet, Graphite, Hornblade, Kyanite, Micas, Muscovite or Illite, Porphyroblasts, Quartz, Sillimanite, Staurolite, Talc, Zircon
Amphibole, Apatite, Biotite, Feldspar, Garnet, Hornblade, Magnetite, Plagioclase, Pyroxene, Quartz, Zircon

Compound Content

CaO, Carbon Dioxide, MgO
Ca, Fe, Potassium Oxide, Mg, Potassium, Silicon Dioxide

Transformation

Metamorphism

Types of Metamorphism

Not Applicable
Burial Metamorphism, Cataclastic Metamorphism

Weathering

Types of Weathering

Biological Weathering, Chemical Weathering, Mechanical Weathering
Biological Weathering, Chemical Weathering, Mechanical Weathering

Erosion

Types of Erosion

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

Properties

Physical Properties

Hardness

1-22-2.25
1 7
👆🏻

Grain Size

Medium to Fine Coarse Grained
Medium to Fine Coarse Grained

Fracture

Conchoidal
Conchoidal

Streak

White
White

Porosity

Highly Porous
Less Porous

Luster

Phyllitic
Subvitreous to Dull

Compressive Strength

NANA
0.15 450
👆🏻

Cleavage

Crenulation and Pervasive
Perfect

Toughness

1.2
Not Available

Specific Gravity

2.72-2.732.86-2.87
0 8.4
👆🏻

Transparency

Opaque
Translucent

Density

2.18-3.3 g/cm32.77-2.771 g/cm3
0 1400
👆🏻

Thermal Properties

Specific Heat Capacity

NA0.92 kJ/Kg K
0.14 3.2
👆🏻

Resistance

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

Reserves

Deposits in Eastern Continents

Asia

Afghanistan, Bangladesh, Bhutan, China, India, Japan, Kazakhstan, Malaysia, Pakistan, Russia, Thailand, Turkey, Vietnam
Not Available

Africa

Egypt, Ethiopia, Morocco, Nigeria, South Africa
Not Available

Europe

Austria, England, France, Georgia, Germany, Italy, Liechtenstein, Monaco, Norway, Slovenia, Spain, Sweden, Switzerland
France, Greece, Romania, Scotland, Spain

Others

Not Available
Not Available

Deposits in Western Continents

North America

Canada, Costa Rica, Cuba, Mexico, Panama, USA
USA

South America

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

Deposits in Oceania Continent

Australia

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

Phyllite 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 Phyllite and Dacite Reserves. Phyllite is a fine-grained metamorphic rock with a well-developed laminar structure, and is intermediate between slate and schist rocks. 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 Phyllite vs Dacite information and Phyllite vs Dacite characteristics in the upcoming sections.

Phyllite 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. Phyllite vs Dacite characteristics assist us to distinguish and recognize rocks. Also you can check about Properties of Phyllite and Properties of Dacite. Learn more about Phyllite vs Dacite in the next section. The interior uses of Phyllite include Decorative aggregates, Floor tiles, Homes and Interior decoration whereas the interior uses of Dacite include Decorative aggregates, Entryways and Interior decoration. Due to some exceptional properties of Phyllite and Dacite, they have various applications in construction industry. The uses of Phyllite in construction industry include As dimension stone, Building houses or walls, Cement manufacture, Construction aggregate, For road aggregate, Raw material for the manufacture of mortar, Roadstone and that of Dacite include As dimension stone, Construction aggregate, For road aggregate, Landscaping.

More about Phyllite and Dacite

Here you can know more about Phyllite and Dacite. The life cycle of a rock consists of formation of rock, composition of rock and transformation of rock. The composition of Phyllite and Dacite consists of mineral content and compound content. The mineral content of Phyllite includes Albite, Alusite, Amphibole, Apatite, Biotite, Chlorite, Epidote, Feldspar, Garnet, Graphite, Hornblade, Kyanite, Micas, Muscovite or Illite, Porphyroblasts, Quartz, Sillimanite, Staurolite, Talc, 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 Metamorphic Rocks. When we have to compare Phyllite vs Dacite, the texture, color and appearance plays an important role in determining the type of rock. Phyllite is available in black to grey, light greenish grey colors whereas, Dacite is available in bluish - grey, brown, grey, light to dark grey colors. Appearance of Phyllite is Crinkled or Wavy and that of Dacite is Vesicular. Properties of rock is another aspect for Phyllite vs Dacite. The hardness of Phyllite is 1-2 and that of Dacite is 2-2.25. The types of Phyllite are Not Available 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 Phyllite and Dacite is white. The specific heat capacity of Phyllite is Not Available 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.Phyllite is heat resistant, pressure resistant, water resistant whereas Dacite is heat resistant, impact resistant, pressure resistant, wear resistant.