Definition
Lignite is a soft brownish coal which shows traces of plants and is intermediate between bituminous coal and peat
Anorthosite is a granular igneous rock composed largely of labradorite or plagioclase
Discoverer
Unknown
Unknown
Etymology
From French, Latin lignum wood + -ite1
From French anorthose plagioclase + -ite1
Class
Sedimentary Rocks
Igneous Rocks
Sub-Class
Durable Rock, Soft Rock
Durable Rock, Medium Hardness Rock
Group
Not Applicable
Plutonic
Other Categories
Coarse Grained Rock, Fine Grained Rock, Medium Grained Rock, Opaque Rock
Coarse Grained Rock, Opaque Rock
Texture
Amorphous, Glassy
Foliated, Glassy
Color
Black, Brown, Dark Brown, Grey, Light to Dark Grey
Black, Bluish - Grey, Brown, Green, Grey, Light Greenish Grey, Pink, White
Durability
Durable
Durable
Appearance
Veined or Pebbled
Layered, Banded, Veined and Shiny
Interior Uses
Not Yet Used
Decorative Aggregates, Floor Tiles, Homes, Interior Decoration
Exterior Uses
Not Yet Used
As Building Stone, As Facing Stone, Garden Decoration
Other Architectural Uses
Not Yet Used
Curbing
Construction Industry
for Road Aggregate, Steel Production
As Dimension Stone, Cement Manufacture, for Road Aggregate
Medical Industry
Not Yet Used
Not Yet Used
Antiquity Uses
Not Yet Used
Artifacts, Sculpture, Small Figurines
Commercial Uses
Electricity Generation
Creating Artwork, Curling
Types
Xyloid Lignite or Fossil Wood and Compact Lignite or Perfect Lignite
Proterozoic Anorthosite and Archean Anorthosite
Features
Generally rough to touch, Helps in production of Heat and Electricity, Used as fossil fuel
Generally rough to touch, Is one of the oldest rock
Archaeological Significance
Monuments
Not Yet Used
Not Yet Used
Famous Monuments
Not Applicable
Not Applicable
Sculpture
Not Yet Used
Used
Famous Sculptures
Not Applicable
Not Applicable
Pictographs
Used
Not Used
Petroglyphs
Used
Not Used
Figurines
Not Yet Used
Used
Formation
Coal formation takes place due to accumulation of plant debris in a swamp environment. The Coal formation process continues, as peat turns into lignite brown or black coal at increasing heat and pressure.
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
Not Available
Amphibole, Clinopyroxene, Ilmenite, Magnetite, Olivine, Orthopyroxene
Compound Content
Carbon, Hydrogen, Nitrogen, Oxygen, Sulphur
Ca, CaO, Chromium(III) Oxide, MgO, Sulfur Trioxide
Types of Metamorphism
Not Applicable
Cataclastic Metamorphism, Contact Metamorphism
Types of Weathering
Biological Weathering, Chemical Weathering, Mechanical Weathering
Biological Weathering
Types of Erosion
Chemical Erosion, Water Erosion, Wind Erosion
Chemical Erosion, Wind Erosion
Grain Size
Medium to Fine Coarse Grained
Coarse Grained
Fracture
Conchoidal
Irregular
Porosity
Highly Porous
Less Porous
Luster
Dull to Vitreous to Submetallic
Pearly to Subvitreous
Cleavage
Non-Existent
Irregular
Toughness
Not Available
Not Available
Specific Gravity
1.1-1.4
2.62-2.82
Transparency
Opaque
Translucent
Density
800-801 g/cm3
2.7-4 g/cm3
Resistance
Heat Resistant
Heat Resistant, Impact Resistant, Pressure Resistant, Scratch Resistant, Wear Resistant
Deposits in Eastern Continents
Asia
Bangladesh, Burma, Cambodia, China, India, Indonesia, Kazakhstan, Malaysia, Mongolia, Pakistan, Turkey, Vietnam
Not Yet Found
Africa
Botswana, Kenya, Morocco, Mozambique, South Africa, Tanzania
Not Yet Found
Europe
Belgium, Bulgaria, England, France, Germany, Greece, Hungary, Kosovo, Netherlands, Norway, Poland, Romania, Serbia, Slovakia, Slovenia, The Czech Republic, Ukraine, United Kingdom
Bulgaria, France, Germany, Greece, Hungary, Italy, Latvia, Lithuania, Malta, Poland, Portugal, Romania, Slovenia, Spain, Sweden, The Czech Republic
Others
Not Yet Found
Not Yet Found
Deposits in Western Continents
North America
Canada, Mexico, USA
Canada
South America
Brazil, Chile, Colombia, Venezuela
Bolivia, Colombia
Deposits in Oceania Continent
Australia
New South Wales, Queensland, Victoria
Central Australia, South Australia, Western Australia
All about Lignite and Anorthosite Properties
Know all about Lignite and Anorthosite properties here. All properties of rocks are important as they define the type of rock and its application. Lignite belongs to Sedimentary Rocks while Anorthosite belongs to Igneous Rocks.Texture of Lignite is Amorphous, Glassy whereas that of Anorthosite is Foliated, Glassy. Lignite appears Veined or Pebbled and Anorthosite appears Layered, Banded, Veined and Shiny. The luster of Lignite is dull to vitreous to submetallic while that of Anorthosite is pearly to subvitreous. Lignite is available in black, brown, dark brown, grey, light to dark grey colors whereas Anorthosite is available in black, bluish - grey, brown, green, grey, light greenish grey, pink, white colors. The commercial uses of Lignite are electricity generation and that of Anorthosite are creating artwork, curling.