Shale

Adakite

Shale and Adakite

Shale

Adakite

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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

Adakite is an intermediate to felsic volcanic rock that has geochemical characteristics of magma which is said to be formed by partial melting of altered basalt that is subducted below volcanic arcs

1.2 History

1.2.1 Origin

Unknown

Adak, Aleutian Islands

1.2.2 Discoverer

Unknown

Defant and Drummond

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 Adak, Aleutian Islands

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

Fine Grained Rock, Medium Grained Rock, Opaque Rock

2 Texture

2.1 Texture

Clastic, Splintery

Porphyritic

2.2 Color

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

Black, Brown, Light to Dark Grey

2.3 Maintenance

Less

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

Dull and Soft

3 Uses

3.1 Architecture

3.1.1 Interior Uses

Decorative Aggregates, Homes, Interior Decoration

Decorative Aggregates, Floor Tiles, Homes, Hotels, Kitchens

3.1.2 Exterior Uses

As Building Stone, As Facing Stone, Office Buildings

3.1.3 Other Architectural Uses

Curbing

Whetstones

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

As Dimension Stone, Cobblestones, Rail Track Ballast, Roadstone

3.2.2 Medical Industry

Not Yet Used

3.3 Antiquity Uses

Artifacts, Sculpture

Monuments, Sculpture, Small Figurines

3.4 Other Uses

3.4.1 Commercial Uses

Creating Artwork, Pottery

Commemorative Tablets, Pottery, Used in aquariums

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

Has High structural resistance against erosion and climate, Host rock for Diamond, Very fine grained rock

4.3 Archaeological Significance

4.3.1 Monuments

Used

4.3.2 Famous Monuments

Jantar Mantar in India

Data Not Available

4.3.3 Sculpture

Used

4.3.4 Famous Sculptures

Data Not Available

4.3.5 Pictographs

Used

4.3.6 Petroglyphs

Used

4.3.7 Figurines

Used

1.2 Fossils

Present

Absent

2 Formation

2.1 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.

Adakite rocks are formed when the hydrous fluids are released from minerals that break down in metamorphosed basalt, and rise into the mantle they initiate partial melting.

2.2 Composition

2.2.1 Mineral Content

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

Olivine, Plagioclase, Pyroxene

2.2.3 Compound Content

Ca, Fe, Mg, Silicon Dioxide, Sodium

Aluminium Oxide, MgO, Silicon Dioxide

2.4 Transformation

2.4.1 Metamorphism

✔ ✘

2.5.1 Types of Metamorphism

Not Applicable

Cataclastic Metamorphism, Contact Metamorphism, Impact Metamorphism, Regional Metamorphism

2.5.3 Weathering

✔ ✘

2.6.2 Types of Weathering

Biological Weathering, Chemical Weathering, Mechanical Weathering

Chemical Weathering, Mechanical Weathering

2.6.3 Erosion

✔ ✘

3.1.1 Types of Erosion

Chemical Erosion, Coastal Erosion, Glacier Erosion

Coastal Erosion, Sea Erosion, Water Erosion

4 Properties

4.1 Physical Properties

4.2.1 Hardness

33-4

1 7

7.1.1 Grain Size

Very fine-grained

Fine to Medium Grained

7.2.2 Fracture

Not Available

Conchoidal

7.2.4 Streak

White

Bluish Black

7.2.5 Porosity

Highly Porous

Less Porous

7.3.2 Luster

Dull

Grainy, Pearly and Vitreous

7.3.4 Compressive Strength

95.00 N/mm²NA

0.15 450

8.1.6 Cleavage

Slaty

Not Available

8.1.8 Toughness

2.6

Not Available

8.1.10 Specific Gravity

2.2-2.8Not Available

0 8.4

8.1.11 Transparency

Opaque

8.1.12 Density

2.4-2.8 g/cm³Not Available

0 1400

8.2 Thermal Properties

8.2.1 Specific Heat Capacity

0.39 kJ/Kg KNA

0.14 3.2

8.3.2 Resistance

Heat Resistant, Impact Resistant

Heat Resistant, Pressure Resistant, Wear Resistant

9 Reserves

9.1 Deposits in Eastern Continents

9.1.1 Asia

Bangladesh, China, India, Russia

India, Russia

9.1.2 Africa

Ethiopia, Kenya, Morocco, South Africa, Tanzania

Ethiopia, Somalia, South Africa

9.1.3 Europe

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

Iceland

9.1.4 Others

Not Yet Found

9.2 Deposits in Western Continents

9.2.1 North America

USA

Canada, USA

9.2.2 South America

Bolivia, Chile, Colombia, Ecuador, Peru, Venezuela

Brazil

9.3 Deposits in Oceania Continent

9.3.1 Australia

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

Not Yet Found

All about Shale and Adakite Properties

Know all about Shale and Adakite properties here. All properties of rocks are important as they define the type of rock and its application. Shale belongs to Sedimentary Rocks while Adakite belongs to Igneous Rocks.Texture of Shale is Clastic, Splintery whereas that of Adakite is Porphyritic. Shale appears Muddy and Adakite appears Dull and Soft. The luster of Shale is dull while that of Adakite is grainy, pearly and vitreous. Shale is available in black, brown, buff, green, grey, red, yellow colors whereas Adakite is available in black, brown, light to dark grey colors. The commercial uses of Shale are creating artwork, pottery and that of Adakite are commemorative tablets, pottery, used in aquariums.