Lignite
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A consolidated, dull, soft brown to black coal with visible plant fragments set in a finer grained matrix. 60-75% carbon content dry ash free, 46-63% volatiles.
A carbon-poor and humidity-rich variety of coal which retains the structure of the original wood.
It is often referred to as brown coal, and is considered the lowest rank of coal (carbon content is only around 25-35%).
Lignite can be separated into two types. The first is xyloid lignite or fossil wood and the second form is the compact lignite or perfect lignite.
Lignite is geologically younger than higher-grade coals, originating mainly in the Tertiary period.
A carbon-poor and humidity-rich variety of coal which retains the structure of the original wood.
It is often referred to as brown coal, and is considered the lowest rank of coal (carbon content is only around 25-35%).
Lignite can be separated into two types. The first is xyloid lignite or fossil wood and the second form is the compact lignite or perfect lignite.
Lignite is geologically younger than higher-grade coals, originating mainly in the Tertiary period.
Classification of Lignite
Rock ➔ Sedimentary rock and sediment ➔ Sedimentary rock ➔ Biochemical and chemical sedimentary rock ➔ Organic-rich-rock ➔ Humic coal series ➔ Coal ➔ Lignite
Sub-divisions of Lignite
Other Names for Lignite
References for Lignite
Reference List:
Internet Links for Lignite
mindat.org URL:
https://www.mindat.org/min-9354.html
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Lake Co., Illinois, USA