Schist and Wackestone

Schist

Wackestone

Wackestone and Schist

Definition

Schist is a medium grade metamorphic rock with medium to large, flat, sheet like grains in a preferred orientation

A carbonate rock which is matrix supported and contains over 10% allochems in a carbonate mud matrix.

History

Discoverer

Unknown

Etymology

From French schiste, Greek skhistos i.e. split

From the English mud and stone, from low German mudde and stainaz

Class

Metamorphic Rocks

Sedimentary Rocks

Sub-Class

Durable Rock, Medium Hardness Rock

Durable Rock, Soft Rock

Family

Group

Not Applicable

Other Categories

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

Fine Grained Rock, Opaque Rock

Texture

Foliated, Platy

Clastic

Color

Black, Blue, Brown, Dark Brown, Green, Grey, Silver

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

Maintenance

Less

Durability

Durable

Water Resistant

Yes

Scratch Resistant

Yes

Stain Resistant

Wind Resistant

Acid Resistant

Appearance

Layered and Shiny

Rough and Dull

Uses

Architecture

Interior Uses

Decorative Aggregates, Floor Tiles, Interior Decoration

Decorative Aggregates, Flooring, Interior Decoration

Exterior Uses

Garden Decoration, Paving Stone

As Facing Stone, Garden Decoration, Roof Tiles

Other Architectural Uses

Not Yet Used

Curbing

Industry

Construction Industry

As Dimension Stone, Building houses or walls, Cement Manufacture, for Road Aggregate, Roadstone

Cement Manufacture, Construction Aggregate, for Road Aggregate, Making natural cement, Raw material for the manufacture of mortar

Medical Industry

Not Yet Used

Antiquity Uses

Artifacts

Artifacts, Sculpture

Other Uses

Commercial Uses

Used in aquariums, Writing Slates

Cemetery Markers, Pottery

Types

Mica Schists, Calc-Silicate Schists, Graphite Schists, Blueschists, Whiteschists, Greenschists, Hornblende Schist, Talc Schist, Chlorite Schist, Garnet Schist, Glaucophane schist.

Marl, Shale and Argillite

Features

Easily splits into thin plates, Smooth to touch

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

Archaeological Significance

Monuments

Not Yet Used

Famous Monuments

Not Applicable

Sculpture

Not Yet Used

Used

Famous Sculptures

Not Applicable

Data Not Available

Pictographs

Used

Petroglyphs

Used

Figurines

Not Yet Used

Used

Fossils

Absent

Present

Formation

Schist formed by dynamic metamorphism at high temperatures and pressures that aligns the grains of mica, hornblende and other elongated minerals into thin layers.

Wackestone is a type of sedimentary rock formed when a river carries or transports pieces of broken rock as it flows. These particles settle down and are then compacted due to high temperature and pressure hence forming Wackestone.

Composition

Mineral Content

Alusite, Amphibole, Biotite, Chlorite, Epidote, Feldspar, Garnet, Graphite, Hornblade, Kyanite, Micas, Muscovite or Illite, Porphyroblasts, Quartz, Sillimanite, Staurolite, Talc

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

Compound Content

CaO, Carbon Dioxide, MgO

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

Transformation

Metamorphism

Types of Metamorphism

Not Applicable

Weathering

Yes

Types of Weathering

Biological Weathering, Chemical Weathering, Mechanical Weathering

Erosion

Yes

Types of Erosion

Chemical Erosion, Coastal Erosion, Glacier Erosion

Chemical Erosion, Sea Erosion, Wind Erosion

Properties

Physical Properties

Hardness

3.5-4

2-3

Grain Size

Medium to Fine Coarse Grained

Very fine-grained

Fracture

Conchoidal

Streak

White

Porosity

Highly Porous

Luster

Shiny

Dull

Compressive Strength

Not Available

225.00 N/mm²

Cleavage

Slaty

Perfect

Toughness

1.5

2.6

Specific Gravity

2.5-2.9

2.2-2.8

Transparency

Opaque

Density

2.8-2.9 g/cm³

2.4-2.8 g/cm³

Thermal Properties

Specific Heat Capacity

Not Available

0.39 kJ/Kg K

Resistance

Impact 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

Not Yet Found

Deposits in Western Continents

North America

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

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

Summary >>

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All about Schist and Wackestone Properties

Know all about Schist and Wackestone properties here. All properties of rocks are important as they define the type of rock and its application. Schist belongs to Metamorphic Rocks while Wackestone belongs to Sedimentary Rocks.Texture of Schist is Foliated, Platy whereas that of Wackestone is Clastic. Schist appears Layered and Shiny and Wackestone appears Rough and Dull. The luster of Schist is shiny while that of Wackestone is dull. Schist is available in black, blue, brown, dark brown, green, grey, silver colors whereas Wackestone is available in black, blue, brown, green, grey, orange, red, white, yellow colors. The commercial uses of Schist are used in aquariums, writing slates and that of Wackestone are cemetery markers, pottery.