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Anthracite
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∙ 14y ago
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What is the hardest and oldest type of coal?
Anthracite is the hardest type of coal.
What is the hardest and oldest type coal?
Anthracite is the hardest type of coal.
Which of these is the hardest and oldest type of coal?
anthracite
What is the name of the hardest coal?
Anthracite
What is the hardest form of coal?
ANTHRACITE!
What is the hardest and oldest of coal?
Anthracite is the hardest type of coal.
What is the hardest and oldest type of coal?
Anthracite is the hardest type of coal.
What is the hardest and oldest type coal?
Anthracite is the hardest type of coal.
Which of these is the hardest and oldest type of coal?
anthracite
What is the name of the hardest coal?
Anthracite
What is the hardest form of coal?
ANTHRACITE!
What is the youngest and softest coal?
Lignite is the youngest and softest coal; bituminous is mid-grade coal, and anthracite is the hardest and hottest burning coal. Even brown coal.
Is oral interpretation one of the hardest forms of communications?
oldest
What type of coal probably formed from the greatest pressure?
Anthracite, the hardest coal, forms from the greatest pressure.
Whats Oldest hardest wood in tree trunk?
Earth's oldest living inhabitant "Methuselah" has reached the age of 4,768 years.
What is the deff of anthracite?
Anthracite is metamorphosed bituminous coal, a coal with the highest percentage of carbon of the coal varieties.
What are the types of coal?
Peat is the youngest of all coals. This means the vegetation from which it came was buried a shorter time than that of other coals. Peat has the least heat value of all solid fuels.Lignite is sometimes called brown coal. It's a little older than peat and has more heating value.Bituminous coal has the highest heating value of all solid fuels.Anthracite coal is the hardest of all coals and the oldest in nature.Coal may also be designated into groups by its ultimate use: Thermal, MetallurgicalThere are three groups (Low, Medium and High Volatile Coal) based on how it can be coked.
