Banded iron formation

Chalk

Banded iron formation and Chalk

Banded iron formation

Chalk

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1 Definition

1.1 Definition

Banded iron formation are distinctive units of sedimentary rock that are almost always of Precambrian age

Chalk is a soft, white, powdery limestone consisting mainly of fossil shells of foraminifers

1.2 History

1.2.1 Origin

Western Australia, Minnesota

Unknown

1.2.2 Discoverer

Unknown

1.3 Etymology

From its formation process

From old English cealc chalk, lime, plaster; pebble, from Greek khalix small pebble, in English transferred to the opaque, white, soft limestone

1.4 Class

Sedimentary Rocks

1.4.1 Sub-Class

Durable Rock, Medium Hardness Rock

Durable Rock, Soft Rock

1.5 Family

1.5.1 Group

Not Applicable

1.6 Other Categories

Coarse Grained Rock, Opaque Rock

Fine Grained Rock, Opaque Rock

2 Texture

2.1 Texture

Banded, Trellis

Clastic or Non-Clastic

2.2 Color

Red, Reddish Brown

Grey, White, Yellow

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

Layered, Banded, Veined and Shiny

Soft

3 Uses

3.1 Architecture

3.1.1 Interior Uses

Decorative Aggregates, Homes

Decorative Aggregates, Homes, Interior Decoration

3.1.2 Exterior Uses

Paving Stone, Office Buildings

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

3.1.3 Other Architectural Uses

Curbing, Whetstones

Powder

3.2 Industry

3.2.1 Construction Industry

As Dimension Stone, Used for flooring, stair treads, borders and window sills.

As Dimension Stone, Cement Manufacture, Construction Aggregate, for Road Aggregate, Making natural cement, raw material for manufacture of quicklime and slaked lime, Source of calcium

3.2.2 Medical Industry

Not Yet Used

3.3 Antiquity Uses

Artifacts

Artifacts, Monuments, Sculpture, Small Figurines

3.4 Other Uses

3.4.1 Commercial Uses

As a touchstone, Cemetery Markers, Creating Artwork

Alumina Refineries, Creating Artwork, Drawing on blackboards, Gymnasts, athletes and mountain climbers use for grip, In aquifers, Paper Industry, Production of Lime, Raw material for manufacture of quicklime, slaked lime, Soil Conditioner, Whiting, Whiting material in toothpaste, paint and paper

4 Types

4.1 Types

Algoma-type , Lake Superior-type, Superior-type and Taconite

Not Available

4.2 Features

Is one of the oldest rock

Clasts are smooth to touch, Is one of the oldest rock, Smooth to touch, Very fine grained rock

4.3 Archaeological Significance

4.3.1 Monuments

Not Yet Used

Used

4.3.2 Famous Monuments

Not Applicable

Data Not Available

4.3.3 Sculpture

Not Yet Used

Used

4.3.4 Famous Sculptures

Not Applicable

Data Not Available

4.3.5 Pictographs

Not Used

Used

4.3.6 Petroglyphs

Not Used

Used

4.3.7 Figurines

Not Yet Used

Used

4.4 Fossils

Present

5 Formation

5.1 Formation

The banded iron layers are formed in sea water when oxygen is released by photosynthetic cyano-bacteria. The oxygen then combines with dissolved iron in ocean to form insoluble iron oxides, which precipitated out, forming a thin layer of banded iron formation on ocean floor.

Chalk is formed from lime mud, which accumulates on the sea floor which is then transformed into rock by geological processes.

5.2 Composition

5.2.1 Mineral Content

Hematite, Magnetite, Quartz

Calcite, Clay, Clay Minerals, Quartz, Sand

5.2.2 Compound Content

Fe, Iron(III) Oxide, Silicon Dioxide

Ca, NaCl, CaO

5.3 Transformation

5.3.1 Metamorphism

✔ ✘

5.3.2 Types of Metamorphism

Not Applicable

5.3.3 Weathering

✔ ✘

5.3.4 Types of Weathering

Chemical Weathering

Biological Weathering, Chemical Weathering

5.3.5 Erosion

✔ ✘

5.3.6 Types of Erosion

Coastal Erosion, Wind Erosion

Chemical Erosion, Coastal Erosion, Water Erosion

6 Properties

6.1 Physical Properties

6.1.1 Hardness

5.5-61

1 7

6.1.2 Grain Size

Large and Coarse Grained

Very fine-grained

6.1.3 Fracture

Uneven, Splintery or Conchoidal

Not Available

6.1.4 Streak

White

6.1.5 Porosity

Highly Porous

6.1.6 Luster

Earthy

Dull

6.1.7 Compressive Strength

NANA

0.15 450

6.1.8 Cleavage

Imperfect

Non-Existent

6.1.9 Toughness

1.5

6.1.10 Specific Gravity

5.0-5.32.3-2.4

0 8.4

6.1.11 Transparency

Translucent to Opaque

Opaque

6.1.12 Density

Not Available2.49-2.50 g/cm³

0 1400

6.2 Thermal Properties

6.2.1 Specific Heat Capacity

3.20 kJ/Kg K0.90 kJ/Kg K

0.14 3.2

6.2.2 Resistance

Heat Resistant, Impact Resistant, Pressure Resistant, Wear Resistant

Heat Resistant

7 Reserves

7.1 Deposits in Eastern Continents

7.1.1 Asia

China, India, Iran, Iraq, Oman, Russia, Saudi Arabia, Taiwan, Thailand, Vietnam

Brunei, India, Indonesia, Malaysia, Singapore, Thailand, Vietnam

7.1.2 Africa

Kenya, Morocco, South Africa, Tanzania

Cameroon, Chad, Ghana, Kenya, Malawi, Sudan, Tanzania, Togo, Zambia, Zimbabwe

7.1.3 Europe

Austria, France, Greece, Italy, Malta, Poland, Portugal, Serbia, Spain, Sweden, United Kingdom

England, France, Germany, Spain, United Kingdom

7.1.4 Others

Greenland, Mid-Atlantic Ridge

Not Yet Found

7.2 Deposits in Western Continents

7.2.1 North America

Canada, Mexico, USA

Canada, USA

7.2.2 South America

Bolivia, Brazil

Colombia

7.3 Deposits in Oceania Continent

7.3.1 Australia

New South Wales, Queensland, South Australia, Western Australia

Adelaide, New Zealand, Queensland, Tonga, Victoria, Yorke Peninsula

All about Banded iron formation and Chalk Properties

Know all about Banded iron formation and Chalk properties here. All properties of rocks are important as they define the type of rock and its application. Banded iron formation and Chalk belong to Sedimentary Rocks.Texture of Banded iron formation is Banded, Trellis whereas that of Chalk is Clastic or Non-Clastic. Banded iron formation appears Layered, Banded, Veined and Shiny and Chalk appears Soft. The luster of Banded iron formation is earthy while that of Chalk is dull. Banded iron formation is available in red, reddish brown colors whereas Chalk is available in grey, white, yellow colors. The commercial uses of Banded iron formation are as a touchstone, cemetery markers, creating artwork and that of Chalk are alumina refineries, creating artwork, drawing on blackboards, gymnasts, athletes and mountain climbers use for grip, in aquifers, paper industry, production of lime, raw material for manufacture of quicklime, slaked lime, soil conditioner, whiting, whiting material in toothpaste, paint and paper.