Phyllite

Claystone

Phyllite and Claystone

Phyllite

Claystone

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Definition

Phyllite is a fine-grained metamorphic rock with a well-developed laminar structure, and is intermediate between slate and schist rocks

Claystone is a fine-grained, dark gray to pink sedimentary rock which mainly consists of compacted and hardened clay

History

Origin

Discoverer

Unknown

Etymology

From Greek phullon leaf + -ite1

From English clay and stone as the rock contains more amount of clay

Class

Metamorphic Rocks

Sedimentary Rocks

Sub-Class

Durable Rock, Soft Rock

Durable Rock, Medium Hardness Rock

Family

Group

Other Categories

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

Fine Grained Rock, Opaque Rock

Texture

Phyllitic Sheen, Slaty

Clastic

Color

Black to Grey, Light Greenish Grey

Black, Blue, Brown, Green, Grey, Orange, Red, White, Yellow

Maintenance

Durability

Durable

Water Resistant

✔ ✘

Scratch Resistant

✔ ✘

Stain Resistant

✔ ✘

Wind Resistant

✔ ✘

Acid Resistant

✔ ✘

Appearance

Crinkled or Wavy

Rough and Dull

Uses

Architecture

Interior Uses

Decorative Aggregates, Floor Tiles, Homes, Interior Decoration

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

Exterior Uses

As Building Stone, As Facing Stone, Garden Decoration

As Facing Stone, Roof Tiles

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

As a Sintering Agent in Steel Industry to process Iron Ore, Cement Manufacture, Construction Aggregate, for Road Aggregate, Making natural cement, Raw material for the manufacture of mortar

Medical Industry

Antiquity Uses

Artifacts, Sculpture

Artifacts, Sculpture, Small Figurines

Other Uses

Commercial Uses

Cemetery Markers, Commemorative Tablets, Creating Artwork, Writing Slates

Pottery

Types

Phyllite

Claystone

Features

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

Available in Lots of Colors and Patterns, Smooth to touch, Very fine grained rock

Archaeological Significance

Monuments

Famous Monuments

Sculpture

Famous Sculptures

Pictographs

Petroglyphs

Figurines

Fossils

Absent

Present

Formation

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

Claystone is generally quite soft, but can be hard and brittle. It forms due to weathering of mudstone.

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, Chlorite, Feldspar, Micas, Muscovite or Illite, Plagioclase, Pyrite, Quartz

Compound Content

CaO, Carbon Dioxide, MgO

Aluminium Oxide, Ca, NaCl, CaO, Iron(III) Oxide, MgO, Silicon Dioxide

Transformation

Metamorphism

✔ ✘

Types of Metamorphism

Weathering

✔ ✘

Types of Weathering

Biological Weathering, Chemical Weathering, Mechanical Weathering

Erosion

✔ ✘

Types of Erosion

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

Coastal Erosion, Water Erosion

Properties

Physical Properties

Hardness

1-23.5-4

1 7

👆🏻

Grain Size

Medium to Fine Coarse Grained

Fine Grained

Fracture

Conchoidal

Streak

White

Porosity

Highly Porous

Very Less Porous

Luster

Phyllitic

Dull

Compressive Strength

50.00 N/mm²40.00 N/mm²

0.15 450

👆🏻

Cleavage

Crenulation and Pervasive

Perfect

Toughness

1.2

2.6

Specific Gravity

2.72-2.730

0 8.4

👆🏻

Transparency

Opaque

Density

2.18-3.3 g/cm³2-2.9 g/cm³

0 1400

👆🏻

Thermal Properties

Specific Heat Capacity

0.79 kJ/Kg K0.92 kJ/Kg K

0.14 3.2

👆🏻

Resistance

Heat Resistant, Pressure Resistant, Water Resistant

Heat Resistant, Impact Resistant

Reserves

Deposits in Eastern Continents

Asia

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

Bangladesh, China, India, Russia

Africa

Egypt, Ethiopia, Morocco, Nigeria, South Africa

Ethiopia, Kenya, Morocco, South Africa, Tanzania

Europe

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

Austria, France, Germany, Greece, Italy, Romania, Scotland, Spain, Switzerland

Others

Deposits in Western Continents

North America

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

Canada, Panama, USA

South America

Brazil, Colombia, Guyana

Bolivia, Chile, Colombia, Ecuador, Peru, Venezuela

Deposits in Oceania Continent

Australia

New South Wales, New Zealand, Queensland

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

All about Phyllite and Claystone Properties

Know all about Phyllite and Claystone properties here. All properties of rocks are important as they define the type of rock and its application. Phyllite belongs to Metamorphic Rocks while Claystone belongs to Sedimentary Rocks.Texture of Phyllite is Phyllitic Sheen, Slaty whereas that of Claystone is Clastic. Phyllite appears Crinkled or Wavy and Claystone appears Rough and Dull. The luster of Phyllite is phyllitic while that of Claystone is dull. Phyllite is available in black to grey, light greenish grey colors whereas Claystone is available in black, blue, brown, green, grey, orange, red, white, yellow colors. The commercial uses of Phyllite are cemetery markers, commemorative tablets, creating artwork, writing slates and that of Claystone are pottery.