Definition
Marl is an unconsolidated sedimentary rock consisting of clay and lime
Anorthosite is a granular igneous rock composed largely of labradorite or plagioclase
Discoverer
William Smith
Unknown
Etymology
From Old French marle, from Late Latin marglia
From French anorthose plagioclase + -ite1
Class
Sedimentary Rocks
Igneous Rocks
Sub-Class
Durable Rock, Soft Rock
Durable Rock, Medium Hardness Rock
Other Categories
Fine Grained Rock, Opaque Rock
Coarse Grained Rock, Opaque Rock
Texture
Earthy
Foliated, Glassy
Color
Beige, Brown, Green, Grey, White
Black, Bluish - Grey, Brown, Green, Grey, Light Greenish Grey, Pink, White
Durability
Durable
Durable
Appearance
Rough and Dull
Layered, Banded, Veined and Shiny
Interior Uses
Decorative Aggregates, Floor Tiles
Decorative Aggregates, Floor Tiles, Homes, Interior Decoration
Exterior Uses
As Building Stone, Roof Tiles
As Building Stone, As Facing Stone, Garden Decoration
Other Architectural Uses
Curbing
Curbing
Construction Industry
Cement Manufacture, Construction Aggregate, for Road Aggregate, Making natural cement, Raw material for the manufacture of mortar
As Dimension Stone, Cement Manufacture, for Road Aggregate
Antiquity Uses
Artifacts, Jewellery, Sculpture, Small Figurines
Artifacts, Sculpture, Small Figurines
Commercial Uses
Creating Artwork, Soil Conditioner
Creating Artwork, Curling
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
Proterozoic Anorthosite and Archean Anorthosite
Features
Generally rough to touch, Is one of the oldest rock, Splintery, Very fine grained rock
Generally rough to touch, Is one of the oldest rock
Archaeological Significance
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.
Anorthosite is a phaneritic, intrusive igneous rock which is characterized by a predominance of plagioclase feldspar which is almost 90–100%, and a minimal mafic component.
Mineral Content
Calcite, Clay, Dolomite, Gypsum, Micas, Pyrite, Quartz
Amphibole, Clinopyroxene, Ilmenite, Magnetite, Olivine, Orthopyroxene
Compound Content
Aluminium Oxide, NaCl, CaO, Iron(III) Oxide, Silicon Dioxide
Ca, CaO, Chromium(III) Oxide, MgO, Sulfur Trioxide
Types of Metamorphism
-
Cataclastic Metamorphism, Contact Metamorphism
Types of Weathering
Biological Weathering, Chemical Weathering
Biological Weathering
Types of Erosion
Chemical Erosion, Coastal Erosion, Water Erosion, Wind Erosion
Chemical Erosion, Wind Erosion
Grain Size
Very fine-grained
Coarse Grained
Fracture
Conchoidal
Irregular
Porosity
Highly Porous
Less Porous
Luster
Dull
Pearly to Subvitreous
Specific Gravity
2.2-2.8
2.62-2.82
Transparency
Opaque
Translucent
Density
2.4-2.8 g/cm3
2.7-4 g/cm3
Resistance
Heat Resistant, Impact Resistant
Heat Resistant, Impact Resistant, Pressure Resistant, Scratch Resistant, Wear Resistant
Deposits in Eastern Continents
Asia
India, Pakistan, Russia
-
Africa
Ethiopia, Kenya, Morocco, South Africa
-
Europe
Austria, France, Germany, Greece, Italy, Romania, Scotland, Spain, Switzerland
Bulgaria, France, Germany, Greece, Hungary, Italy, Latvia, Lithuania, Malta, Poland, Portugal, Romania, Slovenia, Spain, Sweden, The Czech Republic
Deposits in Western Continents
South America
Colombia, Ecuador, Peru
Bolivia, Colombia
Deposits in Oceania Continent
Australia
New South Wales, Victoria, Western Australia
Central Australia, South Australia, Western Australia
All about Marl and Anorthosite Properties
Know all about Marl and Anorthosite properties here. All properties of rocks are important as they define the type of rock and its application. Marl belongs to Sedimentary Rocks while Anorthosite belongs to Igneous Rocks.Texture of Marl is Earthy whereas that of Anorthosite is Foliated, Glassy. Marl appears Rough and Dull and Anorthosite appears Layered, Banded, Veined and Shiny. The luster of Marl is dull while that of Anorthosite is pearly to subvitreous. Marl is available in beige, brown, green, grey, white colors whereas Anorthosite is available in black, bluish - grey, brown, green, grey, light greenish grey, pink, white colors. The commercial uses of Marl are creating artwork, soil conditioner and that of Anorthosite are creating artwork, curling.