Taconite

Marl

Taconite and Marl

Taconite

Marl

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Definition

Taconite is a low-grade iron ore which belongs to sedimentary rock and containing about 27% iron and 51% silica

Marl is an unconsolidated sedimentary rock consisting of clay and lime

History

Origin

Western Australia, Minnesota

Discoverer

Newton Horace Winchell

William Smith

Etymology

From the name of Taconic Mountains in New England

From Old French marle, from Late Latin marglia

Class

Sedimentary 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

Banded, Trellis

Earthy

Color

Red, Reddish Brown

Beige, Brown, Green, Grey, White

Maintenance

Less

Durability

Durable

Water Resistant

✔ ✘

Scratch Resistant

✔ ✘

Stain Resistant

✔ ✘

Wind Resistant

✔ ✘

Acid Resistant

✔ ✘

Appearance

Layered, Banded, Veined and Shiny

Rough and Dull

Uses

Architecture

Interior Uses

Decorative Aggregates, Entryways, Flooring, Homes, Interior Decoration

Decorative Aggregates, Floor Tiles

Exterior Uses

As Building Stone, Garden Decoration, Paving Stone

As Building Stone, Roof Tiles

Other Architectural Uses

Curbing

Industry

Construction Industry

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

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

Medical Industry

Antiquity Uses

Artifacts

Artifacts, Jewellery, Sculpture, Small Figurines

Other Uses

Commercial Uses

As a touchstone, Cemetery Markers, Creating Artwork

Creating Artwork, Soil Conditioner

Types

Iron formation

Clay Marl ,Blue Marl, Red Marl, High Bank Marl, Shell Layer Marl, Under Shell Layer Marl, Sand Marl, Green Marl, Grey Marl and Clayey Marl

Features

Is one of the oldest rock

Generally rough to touch, Is one of the oldest rock, Splintery, Very fine grained rock

Archaeological Significance

Monuments

Famous Monuments

Sculpture

Famous Sculptures

Pictographs

Petroglyphs

Figurines

Fossils

Present

Formation

Taconite is a type of sedimentary rock formed when a river carries or transports pieces of broken rock as it flows. When the river reaches a lake or sea, its load of transported rocks settles or deposits at the bottom of sea or lake.

Marl forms when very fine-grained clay particles are deposited in water which settles at the bottom of water bodies and are compacted by overlying sediment; the water squeezes out and hence forming Marl rock.

Composition

Mineral Content

Hematite, Magnetite, Quartz

Calcite, Clay, Dolomite, Gypsum, Micas, Pyrite, Quartz

Compound Content

Fe, Iron(III) Oxide, Silicon Dioxide

Aluminium Oxide, NaCl, CaO, Iron(III) Oxide, Silicon Dioxide

Transformation

Metamorphism

✔ ✘

Types of Metamorphism

Weathering

✔ ✘

Types of Weathering

Biological Weathering, Mechanical Weathering

Biological Weathering, Chemical Weathering

Erosion

✔ ✘

Types of Erosion

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

Chemical Erosion, Coastal Erosion, Water Erosion, Wind Erosion

Properties

Physical Properties

Hardness

5.5-62-3

1 7

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Grain Size

Large and Coarse Grained

Very fine-grained

Fracture

Uneven, Splintery or Conchoidal

Conchoidal

Streak

White

Porosity

Highly Porous

Luster

Earthy

Dull

Compressive Strength

190.00 N/mm²30.00 N/mm²

0.15 450

👆🏻

Cleavage

Toughness

1.5

2.6

Specific Gravity

5-5.32.2-2.8

0 8.4

👆🏻

Transparency

Translucent to Opaque

Opaque

Density

-9999 g/cm³2.4-2.8 g/cm³

0 1400

👆🏻

Thermal Properties

Specific Heat Capacity

3.20 kJ/Kg K0.80 kJ/Kg K

0.14 3.2

👆🏻

Resistance

Heat Resistant, Impact Resistant, Pressure Resistant, Wear Resistant

Heat Resistant, Impact Resistant

Reserves

Deposits in Eastern Continents

Asia

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

India, Pakistan, Russia

Africa

Kenya, Morocco, South Africa, Tanzania

Ethiopia, Kenya, Morocco, South Africa

Europe

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

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

Others

Greenland, Mid-Atlantic Ridge

Deposits in Western Continents

North America

Canada, Mexico, USA

USA

South America

Bolivia, Brazil

Colombia, Ecuador, Peru

Deposits in Oceania Continent

Australia

New South Wales, Queensland, South Australia, Western Australia

New South Wales, Victoria, Western Australia

All about Taconite and Marl Properties

Know all about Taconite and Marl properties here. All properties of rocks are important as they define the type of rock and its application. Taconite and Marl belong to Sedimentary Rocks.Texture of Taconite is Banded, Trellis whereas that of Marl is Earthy. Taconite appears Layered, Banded, Veined and Shiny and Marl appears Rough and Dull. The luster of Taconite is earthy while that of Marl is dull. Taconite is available in red, reddish brown colors whereas Marl is available in beige, brown, green, grey, white colors. The commercial uses of Taconite are as a touchstone, cemetery markers, creating artwork and that of Marl are creating artwork, soil conditioner.