Paul’s company commissioned some geological studies on some undeveloped arable land. the studies found coal deposits but they were estimated to lie at around one thousand feet or more below the surface. what type of coal did they find? lignite anthracite bituminous subbituminous

The correct answer is option C, Bituminous

Bituminous coal is found usually at the depth of 8,500  and it extends to much greater depths up to 20,000 feet below the earths surface. Lignite is found at shallow depths  

However the depth of burial of coal is as follows –  

a)Lignite – upto 4921 feet

b)Sub Bituminous – 4921 feet to 8202.1 feet

c)Bituminous -  8202.1 feet to 19685 feet

d)Anthracite – Greater than 19685 feet  

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sodium i think the chemical element of atomic number 11, a soft silver-white reactive metal of the alkali metal group.