Marl

Siltstone

Marl and Siltstone

Marl

Siltstone

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Definition

Marl is an unconsolidated sedimentary rock consisting of clay and lime

Siltstone can be defined as a fine-grained sedimentary rock which mainly consists of consolidated silt

History

Origin

Discoverer

William Smith

Unknown

Etymology

From Old French marle, from Late Latin marglia

From English word silt and stone and from Proto-Indo-European root sal and stainaz

Class

Sedimentary Rocks

Sub-Class

Durable Rock, Soft Rock

Durable Rock, Hard Rock

Family

Group

Other Categories

Fine Grained Rock, Opaque Rock

Texture

Earthy

Clastic

Color

Beige, Brown, Green, Grey, White

Brown, Red, Reddish Brown

Maintenance

Less

Durability

Durable

Water Resistant

✔ ✘

Scratch Resistant

✔ ✘

Stain Resistant

✔ ✘

Wind Resistant

✔ ✘

Acid Resistant

✔ ✘

Appearance

Rough and Dull

Rough

Uses

Architecture

Interior Uses

Decorative Aggregates, Floor Tiles

Decorative Aggregates, Interior Decoration

Exterior Uses

As Building Stone, Roof Tiles

As Building Stone, As Facing Stone, Garden Decoration

Other Architectural Uses

Curbing

Industry

Construction Industry

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

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

Medical Industry

Antiquity Uses

Artifacts, Jewellery, Sculpture, Small Figurines

Artifacts, Sculpture, Small Figurines

Other Uses

Commercial Uses

Creating Artwork, Soil Conditioner

Raw material for the manufacture of mortar, Soil Conditioner

Types

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

Siltstone

Features

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

Available in Lots of Colors and Patterns, Easily splits into thin plates, Generally rough to touch, High silica content, Very fine grained rock

Archaeological Significance

Monuments

Famous Monuments

Sculpture

Famous Sculptures

Pictographs

Petroglyphs

Figurines

Fossils

Present

Formation

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.

Siltstone is a type of sedimentary rock which is formed from fine rock particles. As the particles of eroded rock travel along with water, the edges of the rock are worn-out by water into a rounded shape.

Composition

Mineral Content

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

Calcite, Clay, Clay Minerals, Feldspar, Micas, Quartz, Sand, Silica, Silt

Compound Content

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

Aluminium Oxide, CaO, Iron(III) Oxide, Potassium Oxide, MgO, Sodium Oxide, Silicon Dioxide

Transformation

Metamorphism

✔ ✘

Types of Metamorphism

Weathering

✔ ✘

Types of Weathering

Biological Weathering, Chemical Weathering

Biological Weathering, Chemical Weathering, Mechanical Weathering

Erosion

✔ ✘

Types of Erosion

Chemical Erosion, Coastal Erosion, Water Erosion, Wind Erosion

Chemical Erosion, Coastal Erosion, Glacier Erosion

Properties

Physical Properties

Hardness

2-36-7

1 7

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Grain Size

Very fine-grained

Fine Grained

Fracture

Conchoidal

Streak

White

Porosity

Highly Porous

Luster

Dull

Compressive Strength

30.00 N/mm²30.00 N/mm²

0.15 450

👆🏻

Cleavage

Toughness

2.6

Specific Gravity

2.2-2.82.54-2.73

0 8.4

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Transparency

Opaque

Density

2.4-2.8 g/cm³2.6-2.7 g/cm³

0 1400

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Thermal Properties

Specific Heat Capacity

0.80 kJ/Kg K0.84 kJ/Kg K

0.14 3.2

👆🏻

Resistance

Heat Resistant, Impact Resistant

Heat Resistant, Impact Resistant, Pressure Resistant, Water Resistant

Reserves

Deposits in Eastern Continents

Asia

India, Pakistan, Russia

China, India, Kazakhstan, Mongolia, Russia, Uzbekistan

Africa

Ethiopia, Kenya, Morocco, South Africa

Namibia, Nigeria, South Africa

Europe

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

Austria, Denmark, Germany, Great Britain, Netherlands, Norway, Poland, Sweden, Switzerland, United Kingdom

Others

Greenland

Deposits in Western Continents

North America

USA

Canada, USA

South America

Colombia, Ecuador, Peru

Brazil

Deposits in Oceania Continent

Australia

New South Wales, Victoria, Western Australia

New South Wales, New Zealand

All about Marl and Siltstone Properties

Know all about Marl and Siltstone properties here. All properties of rocks are important as they define the type of rock and its application. Marl and Siltstone belong to Sedimentary Rocks.Texture of Marl is Earthy whereas that of Siltstone is Clastic. Marl appears Rough and Dull and Siltstone appears Rough. The luster of Marl and Siltstone is dull. Marl is available in beige, brown, green, grey, white colors whereas Siltstone is available in brown, red, reddish brown colors. The commercial uses of Marl are creating artwork, soil conditioner and that of Siltstone are raw material for the manufacture of mortar, soil conditioner.