Marl and Soapstone
Definition
Definition
Marl is an unconsolidated sedimentary rock consisting of clay and lime
It is a metamorphic magnesium rich rock because it is composed of the mineral talc
History
Origin
Unknown
USA
Discoverer
Unknown
Unknown
Etymology
From Old French marle, from Late Latin marglia
From 17th century, because of its greasy feel and use like a soap
Class
Sedimentary Rocks
Metamorphic Rocks
Sub-Class
Durable Rock, Soft Rock
Durable Rock, Soft Rock
Family
Group
Not Applicable
Not Applicable
Other Categories
Fine Grained Rock, Opaque Rock
Fine Grained Rock, Opaque Rock
Texture
Texture
Earthy
Polished
Color
Beige, Brown, Green, Grey, White
Black, Black to Grey, Green, Grey
Maintenance
Less
Less
Durability
Durable
Durable
Water Resistant
Yes
Yes
Scratch Resistant
No
No
Stain Resistant
No
No
Wind Resistant
No
No
Acid Resistant
No
No
Appearance
Rough and Dull
Dull, Banded and Foilated
Uses
Architecture
Interior Uses
Decorative Aggregates, Floor Tiles
Bathrooms, Decorative Aggregates, Homes, Interior Decoration
Exterior Uses
As Building Stone, Roof Tiles
As Facing Stone, Garden Decoration
Other Architectural Uses
Curbing
Curbing
Industry
Construction Industry
Cement Manufacture, Construction Aggregate, for Road Aggregate, Making natural cement, Raw material for the manufacture of mortar
Manufacture of Magnesium and Dolomite Refractories
Medical Industry
Not Yet Used
Taken as a Supplement for Calcium or Magnesium
Antiquity Uses
Artifacts, Jewellery, Sculpture, Small Figurines
Artifacts, Jewellery, Monuments, Sculpture
Other Uses
Commercial Uses
Creating Artwork, Soil Conditioner
Cemetery Markers, Creating Artwork, Gemstone, Jewelry, Manufacture of Soap, Solvents, Dyes, Plastics and Fibres, Production of Lime, Source of Magnesia (MgO)
Types
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
Not Available
Features
Generally rough to touch, Is one of the oldest rock, Splintery, Very fine grained rock
Host Rock for Lead
Archaeological Significance
Monuments
Not Yet Used
Used
Famous Monuments
Not Applicable
Christ the Redeemer in Rio de Janeiro, Stonehenge in English county of Wiltshire
Sculpture
Used
Used
Famous Sculptures
Data Not Available
Data Not Available
Pictographs
Used
Used
Petroglyphs
Used
Used
Figurines
Used
Used
Fossils
Present
Absent
Formation
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.
Soapstone is a talc-schist, which is a type of metamorphic rock and it is largely composed of the mineral talc and is thus rich inmagnesium.
Composition
Mineral Content
Calcite, Clay, Dolomite, Gypsum, Micas, Pyrite, Quartz
Albite, Apatite, Biotite, Calcite, Carbonate, Clay Minerals, Hornblende, Ilmenite, Micas, Plagioclase, Pyroxene, Quartz
Compound Content
Aluminium Oxide, NaCl, CaO, Iron(III) Oxide, Silicon Dioxide
CaO, Mg, MgO
Transformation
Metamorphism
No
Yes
Types of Metamorphism
Not Applicable
Burial Metamorphism, Cataclastic Metamorphism, Contact Metamorphism, Hydrothermal Metamorphism, Impact Metamorphism, Regional Metamorphism
Weathering
Yes
No
Types of Weathering
Biological Weathering, Chemical Weathering
Not Applicable
Erosion
Yes
No
Types of Erosion
Chemical Erosion, Coastal Erosion, Water Erosion, Wind Erosion
Not Applicable
Properties
Physical Properties
Hardness
2-3
1
Grain Size
Very fine-grained
Fine Grained
Fracture
Conchoidal
Conchoidal
Streak
White
Black
Porosity
Highly Porous
Less Porous
Luster
Dull
Greasy
Compressive Strength
Not Available
225.00 N/mm2
7
Cleavage
Not Available
Perfect
Toughness
2.6
1
Specific Gravity
2.2-2.8
2.86
Transparency
Opaque
Opaque
Density
2.4-2.8 g/cm3
2.8-2.9 g/cm3
Thermal Properties
Specific Heat Capacity
Not Available
0.88 kJ/Kg K
13
Resistance
Heat Resistant, Impact Resistant
Heat Resistant, Pressure Resistant
Reserves
Deposits in Eastern Continents
Asia
India, Pakistan, Russia
China, India, Indonesia, Japan, North Korea, Russia, Saudi Arabia, Singapore, South Korea, Sri Lanka, Tajikistan, Thailand
Africa
Ethiopia, Kenya, Morocco, South Africa
Egypt, Ethiopia, Ghana, South Africa, Western Africa
Europe
Austria, France, Germany, Greece, Italy, Romania, Scotland, Spain, Switzerland
Austria, England, Finland, France, Germany, Greece, Spain, Sweden, Switzerland, United Kingdom
Others
Not Yet Found
Not Yet Found
Deposits in Western Continents
North America
USA
Canada, USA
South America
Colombia, Ecuador, Peru
Colombia
Deposits in Oceania Continent
Australia
New South Wales, Victoria, Western Australia
Central Australia, New Zealand, Queensland
All about Marl and Soapstone Properties
Know all about Marl and Soapstone properties here. All properties of rocks are important as they define the type of rock and its application. Marl belongs to Sedimentary Rocks while Soapstone belongs to Metamorphic Rocks.Texture of Marl is Earthy whereas that of Soapstone is Polished. Marl appears Rough and Dull and Soapstone appears Dull, Banded and Foilated. The luster of Marl is dull while that of Soapstone is greasy. Marl is available in beige, brown, green, grey, white colors whereas Soapstone is available in black, black to grey, green, grey colors. The commercial uses of Marl are creating artwork, soil conditioner and that of Soapstone are cemetery markers, creating artwork, gemstone, jewelry, manufacture of soap, solvents, dyes, plastics and fibres, production of lime, source of magnesia (mgo).
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