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Banded iron formation
Banded iron formation

Hornfels
Hornfels



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Banded iron formation
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Hornfels

Banded iron formation vs Hornfels

Definition

Definition

Banded iron formation are distinctive units of sedimentary rock that are almost always of Precambrian age
Hornfels is a metamorphic rock formed by the contact between mudstone or other clay rich rock, and a hot igneous body, and represents a heat altered equivalent of the original rock

History

Origin

Western Australia, Minnesota
New Zealand

Discoverer

Johann Gottlob Lehmann
Unknown

Etymology

From its formation process
From German which means hornstone

Class

Sedimentary Rocks
Metamorphic Rocks

Sub-Class

Durable Rock, Medium Hardness Rock
Durable Rock, Soft Rock

Family

Group

-
-

Other Categories

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

Texture

Texture

Banded, Trellis
Granular, Platy

Color

Red, Reddish Brown
Brown, Dark Greenish - Grey, Green, Reddish Brown

Maintenance

Less
Less

Durability

Durable
Durable

Water Resistant

Scratch Resistant

Stain Resistant

Wind Resistant

Acid Resistant

Appearance

Layered, Banded, Veined and Shiny
Dull

Uses

Architecture

Interior Uses

Decorative Aggregates, Homes
Decorative Aggregates, Flooring, Homes, Interior Decoration

Exterior Uses

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

Other Architectural Uses

Curbing, Whetstones
Curbing

Industry

Construction Industry

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

Medical Industry

-
-

Antiquity Uses

Artifacts
Artifacts, Monuments

Other Uses

Commercial Uses

As a touchstone, Cemetery Markers, Creating Artwork
Cemetery Markers, Commemorative Tablets, Creating Artwork

Types

Types

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

Features

Is one of the oldest rock
Smooth to touch

Archaeological Significance

Monuments

-
-

Famous Monuments

-
-

Sculpture

-
-

Famous Sculptures

-
-

Pictographs

-
-

Petroglyphs

-
-

Figurines

-
-

Fossils

Present
Absent

Formation

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.
Due to change in environmental conditions, rocks are heated and pressurized deep inside the Earth's surface. Hornfels is formed from the extreme heat caused by magma or by the intense collisions and friction of tectonic plates.

Composition

Mineral Content

Hematite, Magnetite, Quartz
Andalusite

Compound Content

Fe, Iron(III) Oxide, Silicon Dioxide
Fe, Mg

Transformation

Metamorphism

Types of Metamorphism

-
-

Weathering

Types of Weathering

Chemical Weathering
Biological Weathering

Erosion

Types of Erosion

Coastal Erosion, Wind Erosion
Chemical Erosion, Glacier Erosion, Sea Erosion, Water Erosion, Wind Erosion

Properties

Physical Properties

Hardness

5.5-62-3
1 7
👆🏻

Grain Size

Large and Coarse Grained
Fine Grained

Fracture

Uneven, Splintery or Conchoidal
Conchoidal

Streak

White
-

Porosity

Highly Porous
Highly Porous

Luster

Earthy
Shiny

Compressive Strength

220.00 N/mm25.80 N/mm2
0.15 450
👆🏻

Cleavage

-
Perfect

Toughness

1.5
-

Specific Gravity

5.0-5.33.4-3.9
0 8.4
👆🏻

Transparency

Translucent to Opaque
Opaque

Density

-9999 g/cm30.25-0.30 g/cm3
0 1400
👆🏻

Thermal Properties

Specific Heat Capacity

3.20 kJ/Kg K0.84 kJ/Kg K
0.14 3.2
👆🏻

Resistance

Heat Resistant, Impact Resistant, Pressure Resistant, Wear Resistant
Heat Resistant, Impact Resistant, Pressure Resistant

Reserves

Deposits in Eastern Continents

Asia

China, India, Iran, Iraq, Oman, Russia, Saudi Arabia, Taiwan, Thailand, Vietnam
Bangladesh, Bhutan, China, India, North Korea, Qatar, Russia, Saudi Arabia, South Korea, Thailand

Africa

Kenya, Morocco, South Africa, Tanzania
Cameroon, East Africa, Tanzania, Western Africa

Europe

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

Others

Greenland, Mid-Atlantic Ridge
-

Deposits in Western Continents

North America

Canada, Mexico, USA
Canada, USA

South America

Bolivia, Brazil
Bolivia, Brazil, Colombia, Ecuador

Deposits in Oceania Continent

Australia

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

Banded iron formation vs Hornfels Information

Earth’s outer layer is covered by rocks and these rocks have different physical and chemical properties. As two rocks are not same, it’s fun to compare them. You can also know more about Banded iron formation and Hornfels Reserves. Banded iron formation are distinctive units of sedimentary rock that are almost always of Precambrian age. Hornfels is a metamorphic rock formed by the contact between mudstone or other clay rich rock, and a hot igneous body, and represents a heat altered equivalent of the original rock. These rocks are composed of many distinct minerals. The process of formation of rocks is different for various rocks. Rocks are quarried from many years for various purposes. You can check out Banded iron formation vs Hornfels information and Banded iron formation vs Hornfels characteristics in the upcoming sections.

Banded iron formation vs Hornfels Characteristics

Though some rocks look identical, they have certain characteristics which distinguish them from others. Characteristics of rocks include texture, appearance, color, fracture, streak, hardness etc. Banded iron formation vs Hornfels characteristics assist us to distinguish and recognize rocks. Also you can check about Properties of Banded iron formation and Properties of Hornfels. Learn more about Banded iron formation vs Hornfels in the next section. The interior uses of Banded iron formation include Decorative aggregates and Homes whereas the interior uses of Hornfels include Decorative aggregates, Flooring, Homes and Interior decoration. Due to some exceptional properties of Banded iron formation and Hornfels, they have various applications in construction industry. The uses of Banded iron formation in construction industry include As dimension stone, Used for flooring, stair treads, borders and window sills. and that of Hornfels include For road aggregate, Roadstone.

More about Banded iron formation and Hornfels

Here you can know more about Banded iron formation and Hornfels. The life cycle of a rock consists of formation of rock, composition of rock and transformation of rock. The composition of Banded iron formation and Hornfels consists of mineral content and compound content. The mineral content of Banded iron formation includes Hematite, Magnetite, Quartz and mineral content of Hornfels includes Andalusite. You can also check out the list of all Sedimentary Rocks. When we have to compare Banded iron formation vs Hornfels, the texture, color and appearance plays an important role in determining the type of rock. Banded iron formation is available in red, reddish brown colors whereas, Hornfels is available in brown, dark greenish - grey, green, reddish brown colors. Appearance of Banded iron formation is Layered, Banded, Veined and Shiny and that of Hornfels is Dull. Properties of rock is another aspect for Banded iron formation vs Hornfels. The hardness of Banded iron formation is 5.5-6 and that of Hornfels is 2-3. The types of Banded iron formation are Algoma-type , Lake Superior-type, Superior-type and Taconite whereas types of Hornfels are Biotite hornfels. Streak of rock is the color of powder produced when it is dragged across an unweathered surface. The streak of Banded iron formation is white while that of Hornfels is . The specific heat capacity of Banded iron formation is 3.20 kJ/Kg K and that of Hornfels is 0.84 kJ/Kg K. Depending on the properties like hardness, toughness, specific heat capacity, porosity etc., rocks are resistant to heat, wear, impact, etc.Banded iron formation is heat resistant, impact resistant, pressure resistant, wear resistant whereas Hornfels is heat resistant, impact resistant, pressure resistant.