Banded iron formation

Rhyolite

Banded iron formation and Rhyolite

Banded iron formation

Rhyolite

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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

Rhyolite is a fine-grained igneous rock which is rich in silica

1.2 History

1.2.1 Origin

Western Australia, Minnesota

North America

1.2.2 Discoverer

Unknown

Ferdinand von Richthofen

1.3 Etymology

From its formation process

From German Rhyolit, from Greek rhuax lava stream + lithos stone

1.4 Class

Sedimentary Rocks

Igneous Rocks

1.4.1 Sub-Class

Durable Rock, Medium Hardness Rock

Durable Rock, Hard Rock

1.5 Family

1.5.1 Group

Not Applicable

Volcanic

1.6 Other Categories

Coarse Grained Rock, Opaque Rock

2 Texture

2.1 Texture

Banded, Trellis

Aphanitic, Glassy, Porphyritic

2.2 Color

Red, Reddish Brown

Grey, White, Light Black

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

Banded

3 Uses

3.1 Architecture

3.1.1 Interior Uses

Decorative Aggregates, Homes

Decorative Aggregates, Homes, Hotels, Interior Decoration, Kitchens

3.1.2 Exterior Uses

Paving Stone, Office Buildings

As Building Stone, As Facing Stone, Paving Stone, Office Buildings

3.1.3 Other Architectural Uses

Curbing, Whetstones

Not Yet Used

3.2 Industry

3.2.1 Construction Industry

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

Arrowheads, As Dimension Stone, Building houses or walls, Construction Aggregate, Cutting Tool, for Road Aggregate, Knives

3.2.2 Medical Industry

Not Yet Used

3.3 Antiquity Uses

Artifacts

3.4 Other Uses

3.4.1 Commercial Uses

As a touchstone, Cemetery Markers, Creating Artwork

Gemstone, Laboratory bench tops, Jewelry

4 Types

4.1 Types

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

Pumice Rocks, Obsidian Rocks, Perlite Rocks, Porphyritic Rocks.

4.2 Features

Is one of the oldest rock

Acidic in nature, Available in lots of colors

4.3 Archaeological Significance

4.3.1 Monuments

Not Yet Used

4.3.2 Famous Monuments

Not Applicable

4.3.3 Sculpture

Not Yet Used

4.3.4 Famous Sculptures

Not Applicable

4.3.5 Pictographs

Not Used

4.3.6 Petroglyphs

Not Used

4.3.7 Figurines

Not Yet Used

4.4 Fossils

Present

Absent

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.

Rhyolite is a felsic extrusive rock and due to its high silica content, rhyolite lava is very viscous and is volcanic equivalent of granite.

5.2 Composition

5.2.1 Mineral Content

Hematite, Magnetite, Quartz

Biotite, Feldspar, Hornblade, Plagioclase, Pyroxene, Quartz

5.2.2 Compound Content

Fe, Iron(III) Oxide, Silicon Dioxide

Ca, Fe, Potassium Oxide, Mg, Potassium, Silicon Dioxide, Sodium

5.3 Transformation

5.3.1 Metamorphism

✔ ✘

5.3.2 Types of Metamorphism

Not Applicable

Burial Metamorphism, Cataclastic Metamorphism, Regional Metamorphism

5.3.3 Weathering

✔ ✘

5.3.4 Types of Weathering

Chemical Weathering

Biological Weathering, Chemical Weathering, Mechanical Weathering

5.3.5 Erosion

✔ ✘

5.3.6 Types of Erosion

Coastal Erosion, Wind Erosion

Chemical Erosion, Sea Erosion, Water Erosion, Wind Erosion

6 Properties

6.1 Physical Properties

6.1.1 Hardness

5.5-66-7

1 7

6.1.2 Grain Size

Large and Coarse Grained

6.1.3 Fracture

Uneven, Splintery or Conchoidal

Sub-conchoidal

6.1.4 Streak

White

Colorless

6.1.5 Porosity

Highly Porous

6.1.6 Luster

Earthy

6.1.7 Compressive Strength

NA140.00 N/mm²

0.15 450

6.1.8 Cleavage

Imperfect

Not Available

6.1.9 Toughness

1.5

6.1.10 Specific Gravity

5.0-5.32.65-2.67

0 8.4

6.1.11 Transparency

Translucent to Opaque

Opaque

6.1.12 Density

Not Available2.4-2.6 g/cm³

0 1400

6.2 Thermal Properties

6.2.1 Specific Heat Capacity

3.20 kJ/Kg KNA

0.14 3.2

6.2.2 Resistance

Heat Resistant, Impact Resistant, Pressure Resistant, Wear Resistant

Heat Resistant, Wear Resistant

7 Reserves

7.1 Deposits in Eastern Continents

7.1.1 Asia

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

China, India

7.1.2 Africa

Kenya, Morocco, South Africa, Tanzania

Angola, Egypt, Madagascar, Namibia, Nigeria, South Africa

7.1.3 Europe

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

Germany, Iceland, Ireland, Italy, Spain

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

Argentina, Bolivia, Chile, Colombia, Ecuador, Peru, Venezuela

7.3 Deposits in Oceania Continent

7.3.1 Australia

New South Wales, Queensland, South Australia, Western Australia

New Zealand, Queensland, Western Australia

All about Banded iron formation and Rhyolite Properties

Know all about Banded iron formation and Rhyolite properties here. All properties of rocks are important as they define the type of rock and its application. Banded iron formation belongs to Sedimentary Rocks while Rhyolite belongs to Igneous Rocks.Texture of Banded iron formation is Banded, Trellis whereas that of Rhyolite is Aphanitic, Glassy, Porphyritic. Banded iron formation appears Layered, Banded, Veined and Shiny and Rhyolite appears Banded. The luster of Banded iron formation and Rhyolite is earthy. Banded iron formation is available in red, reddish brown colors whereas Rhyolite is available in grey, white, light black colors. The commercial uses of Banded iron formation are as a touchstone, cemetery markers, creating artwork and that of Rhyolite are gemstone, laboratory bench tops, jewelry.