Shale

Tachylite

Shale and Tachylite

Shale

Tachylite

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1 Definition

1.1 Definition

Shale is a fine-grained sedimentary rock which is formed by the compaction of silt and clay-size mineral particles

Tachylite is a vitreous form of basaltic volcanic glass. This glass is formed naturally by the rapid cooling of molten basalt

1.2 History

1.2.1 Origin

Unknown

Iceland

1.2.2 Discoverer

Unknown

1.3 Etymology

From German Schalstein laminated limestone, and Schalgebirge layer of stone in stratified rock. From Old English scealu in its base sense of- thing that divides or separate,

From German Tachylite, from tachy- + Greek lutos soluble, melting

1.4 Class

Sedimentary Rocks

Igneous Rocks

1.4.1 Sub-Class

Durable Rock, Medium Hardness Rock

1.5 Family

1.5.1 Group

Not Applicable

Volcanic

1.6 Other Categories

Fine Grained Rock, Opaque Rock

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

2 Texture

2.1 Texture

Clastic, Splintery

Vitreous

2.2 Color

Black, Brown, Buff, Green, Grey, Red, Yellow

Black, Dark Brown

2.3 Maintenance

2.4 Durability

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

Muddy

Glassy

3 Uses

3.1 Architecture

3.1.1 Interior Uses

Decorative Aggregates, Homes, Interior Decoration

Decorative Aggregates, Interior Decoration

3.1.2 Exterior Uses

As Building Stone, As Facing Stone, Office Buildings

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

3.1.3 Other Architectural Uses

Curbing

3.2 Industry

3.2.1 Construction Industry

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

Cutting Tool, Knives, Landscaping, Scrapers

3.2.2 Medical Industry

Not Yet Used

3.3 Antiquity Uses

Artifacts, Sculpture

Artifacts

3.4 Other Uses

3.4.1 Commercial Uses

Creating Artwork, Pottery

Cemetery Markers, Creating Artwork

4 Types

4.1 Types

Red Shale, Black Shale, Green Shale, Grey Shale and Yellow Shale

Not Available

4.2 Features

Easily splits into thin plates, Generally rough to touch, Very fine grained rock

Available in Lots of Colors and Patterns, Clasts are smooth to touch, NA

4.3 Archaeological Significance

4.3.1 Monuments

Used

Not Yet Used

4.3.2 Famous Monuments

Jantar Mantar in India

Not Applicable

4.3.3 Sculpture

Used

Not Yet Used

4.3.4 Famous Sculptures

Data Not Available

Not Applicable

4.3.5 Pictographs

Used

4.3.6 Petroglyphs

Used

4.3.7 Figurines

Used

Not Yet Used

4.4 Fossils

Present

Absent

5 Formation

5.1 Formation

Shale forms when very fine-grained clay particles are deposited in water which settle at the bottom of water bodies. They are later compacted hence forming shale.

Tachylite is a fine-grained, hard rock which is a type of metasomatite, essentially altered basalt. It forms with or without crystallization, either below the surface as intrusive rocks or on the surface as extrusive rocks.

5.2 Composition

5.2.1 Mineral Content

Albite, Biotite, Calcite, Chert, Chlorite, Dolomite, Hematite, Micas, Muscovite or Illite, Pyrite, Quartz, Silica, Sulfides

Feldspar, Olivine

5.2.2 Compound Content

Ca, Fe, Mg, Silicon Dioxide, Sodium

Fe, Mg

5.3 Transformation

5.3.1 Metamorphism

✔ ✘

5.3.2 Types of Metamorphism

Not Applicable

Burial Metamorphism, Cataclastic Metamorphism, Contact Metamorphism, Hydrothermal Metamorphism, Impact Metamorphism, Regional Metamorphism

5.3.3 Weathering

✔ ✘

5.3.4 Types of Weathering

Biological Weathering, Chemical Weathering, Mechanical Weathering

5.3.5 Erosion

✔ ✘

5.3.6 Types of Erosion

Chemical Erosion, Coastal Erosion, Glacier Erosion

Chemical Erosion, Sea Erosion, Water Erosion, Wind Erosion

6 Properties

6.1 Physical Properties

6.1.1 Hardness

35.5

1 7

6.1.2 Grain Size

Very fine-grained

Medium to Fine Coarse Grained

6.1.3 Fracture

Not Available

Conchoidal

6.1.4 Streak

White

Vermilion

6.1.5 Porosity

Highly Porous

Less Porous

6.1.6 Luster

Dull

Resinous

6.1.7 Compressive Strength

95.00 N/mm²206.00 N/mm²

0.15 450

6.1.8 Cleavage

Slaty

Not Available

6.1.9 Toughness

2.6

Not Available

6.1.10 Specific Gravity

2.2-2.82.4

0 8.4

6.1.11 Transparency

Opaque

6.1.12 Density

2.4-2.8 g/cm³3.058 g/cm³

0 1400

6.2 Thermal Properties

6.2.1 Specific Heat Capacity

0.39 kJ/Kg K0.56 kJ/Kg K

0.14 3.2

6.2.2 Resistance

Heat Resistant, Impact Resistant

Heat Resistant, Impact Resistant, Wear Resistant

7 Reserves

7.1 Deposits in Eastern Continents

7.1.1 Asia

Bangladesh, China, India, Russia

Cambodia, Russia, South Korea

7.1.2 Africa

Ethiopia, Kenya, Morocco, South Africa, Tanzania

East Africa

7.1.3 Europe

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

England, Germany, Hungary, Iceland, Scotland, Sweden

7.1.4 Others

Not Yet Found

Hawaii Islands

7.2 Deposits in Western Continents

7.2.1 North America

USA

7.2.2 South America

Bolivia, Chile, Colombia, Ecuador, Peru, Venezuela

Not Yet Found

7.3 Deposits in Oceania Continent

7.3.1 Australia

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

Victoria

All about Shale and Tachylite Properties

Know all about Shale and Tachylite properties here. All properties of rocks are important as they define the type of rock and its application. Shale belongs to Sedimentary Rocks while Tachylite belongs to Igneous Rocks.Texture of Shale is Clastic, Splintery whereas that of Tachylite is Vitreous. Shale appears Muddy and Tachylite appears Glassy. The luster of Shale is dull while that of Tachylite is resinous. Shale is available in black, brown, buff, green, grey, red, yellow colors whereas Tachylite is available in black, dark brown colors. The commercial uses of Shale are creating artwork, pottery and that of Tachylite are cemetery markers, creating artwork.