Anthracite, Lignite, bituminous coal

DID YOU KNOW? Lignite, Peat

Anthracite and lignite hi-res stock photography and images - Alamy

What are the types of coal?

Coal Metamorphism - an overview

File:Bituminous coal (Ferron Sandstone Member, Mancos Shale, Upper Cretaceous; Bronco Mine, Emery County, Utah, USA) 9.jpg - Wikimedia Commons

Anthracite coal

Earth Science - Coal is a combustible black or brownish-black sedimentary rock, formed as rock strata called coal seams. Coal is mostly carbon with variable amounts of other elements; chiefly hydrogen, sulfur

From left to right: peat, lignite, sub-bituminous, bituminous, and

How Coal Works Union of Concerned Scientists