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Phyllite
Phyllite

Rhyolite
Rhyolite



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Phyllite
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Phyllite vs Rhyolite

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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
Rhyolite is a fine-grained igneous rock which is rich in silica

History

Origin

-
North America

Discoverer

Unknown
Ferdinand von Richthofen

Etymology

From Greek phullon leaf + -ite1
From German Rhyolit, from Greek rhuax lava stream + lithos stone

Class

Metamorphic Rocks
Igneous Rocks

Sub-Class

Durable Rock, Soft Rock
Durable Rock, Hard Rock

Family

Group

-
Volcanic

Other Categories

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

Texture

Texture

Phyllitic Sheen, Slaty
Aphanitic, Glassy, Porphyritic

Color

Black to Grey, Light Greenish Grey
Grey, White, Light Black

Maintenance

More
More

Durability

Durable
Durable

Water Resistant

Scratch Resistant

Stain Resistant

Wind Resistant

Acid Resistant

Appearance

Crinkled or Wavy
Banded

Uses

Architecture

Interior Uses

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

Exterior Uses

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

Other Architectural Uses

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
Arrowheads, As Dimension Stone, Building houses or walls, Construction Aggregate, Cutting Tool, for Road Aggregate, Knives

Medical Industry

-
-

Antiquity Uses

Artifacts, Sculpture
Artifacts

Other Uses

Commercial Uses

Cemetery Markers, Commemorative Tablets, Creating Artwork, Writing Slates
Gemstone, Laboratory bench tops, Jewelry

Types

Types

Phyllite
Pumice Rocks, Obsidian Rocks, Perlite Rocks, Porphyritic Rocks.

Features

Easily splits into thin plates, Is one of the oldest rock, Surfaces are often shiny
Acidic in nature, Available in lots of colors

Archaeological Significance

Monuments

-
-

Famous Monuments

-
-

Sculpture

-
-

Famous Sculptures

-
-

Pictographs

-
-

Petroglyphs

-
-

Figurines

-
-

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.
Rhyolite is a felsic extrusive rock and due to its high silica content, rhyolite lava is very viscous and is volcanic equivalent of granite.

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
Biotite, Feldspar, Hornblade, Plagioclase, Pyroxene, Quartz

Compound Content

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

Transformation

Metamorphism

Types of Metamorphism

-
Burial Metamorphism, Cataclastic Metamorphism, Regional 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, Sea Erosion, Water Erosion, Wind Erosion

Properties

Physical Properties

Hardness

1-26-7
1 7
👆🏻

Grain Size

Medium to Fine Coarse Grained
Large and Coarse Grained

Fracture

Conchoidal
Sub-conchoidal

Streak

White
-

Porosity

Highly Porous
Highly Porous

Luster

Phyllitic
Earthy

Compressive Strength

50.00 N/mm2140.00 N/mm2
0.15 450
👆🏻

Cleavage

Crenulation and Pervasive
-

Toughness

1.2
2

Specific Gravity

2.72-2.732.65-2.67
0 8.4
👆🏻

Transparency

Opaque
Opaque

Density

2.18-3.3 g/cm32.4-2.6 g/cm3
0 1400
👆🏻

Thermal Properties

Specific Heat Capacity

0.79 kJ/Kg K0.71 kJ/Kg K
0.14 3.2
👆🏻

Resistance

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

Reserves

Deposits in Eastern Continents

Asia

Afghanistan, Bangladesh, Bhutan, China, India, Japan, Kazakhstan, Malaysia, Pakistan, Russia, Thailand, Turkey, Vietnam
China, India

Africa

Egypt, Ethiopia, Morocco, Nigeria, South Africa
Angola, Egypt, Madagascar, Namibia, Nigeria, South Africa

Europe

Austria, England, France, Georgia, Germany, Italy, Liechtenstein, Monaco, Norway, Slovenia, Spain, Sweden, Switzerland
Germany, Iceland, Ireland, Italy, Spain

Others

-
-

Deposits in Western Continents

North America

Canada, Costa Rica, Cuba, Mexico, Panama, USA
Canada, 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, Queensland, Western Australia

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

Phyllite vs Rhyolite 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 Rhyolite characteristics assist us to distinguish and recognize rocks. Also you can check about Properties of Phyllite and Properties of Rhyolite. Learn more about Phyllite vs Rhyolite in the next section. The interior uses of Phyllite include Decorative aggregates, Floor tiles, Homes and Interior decoration whereas the interior uses of Rhyolite include Decorative aggregates, Homes, Hotels, Interior decoration and Kitchens. Due to some exceptional properties of Phyllite and Rhyolite, 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 Rhyolite include Arrowheads, As dimension stone, Building houses or walls, Construction aggregate, Cutting tool, For road aggregate, Knives.

More about Phyllite and Rhyolite

Here you can know more about Phyllite and Rhyolite. The life cycle of a rock consists of formation of rock, composition of rock and transformation of rock. The composition of Phyllite and Rhyolite 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 Rhyolite includes Biotite, Feldspar, Hornblade, Plagioclase, Pyroxene, Quartz. You can also check out the list of all Metamorphic Rocks. When we have to compare Phyllite vs Rhyolite, 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, Rhyolite is available in grey, white, light black colors. Appearance of Phyllite is Crinkled or Wavy and that of Rhyolite is Banded. Properties of rock is another aspect for Phyllite vs Rhyolite. The hardness of Phyllite is 1-2 and that of Rhyolite is 6-7. The types of Phyllite are Phyllite whereas types of Rhyolite are Pumice Rocks, Obsidian Rocks, Perlite Rocks, Porphyritic Rocks.. Streak of rock is the color of powder produced when it is dragged across an unweathered surface. The streak of Phyllite is white while that of Rhyolite is . The specific heat capacity of Phyllite is 0.79 kJ/Kg K and that of Rhyolite is 0.71 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 Rhyolite is heat resistant, wear resistant.