The Coal Region is a region of Northeastern Pennsylvania. It is known for being home to the largest known deposits of anthracite coal in the world with...

India (101.3 billion tonnes). A coal-mining region is a region in which coal mining is a significant economic activity. Coal-mining regions are often associated...

and the highest energy density of all types of coal and is the highest ranking of coals. The Coal Region of Northeastern Pennsylvania in the United States...

Donetsk and Luhansk regions of Ukraine.[citation needed] The historical coal mining region excluded parts of these oblasts, and included areas in Dnipropetrovsk...

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...

Pennsylvania's coal region is a historical, cultural, and natural region; the Kuznetsk Basin, a similarly important coal mining region in Russia; Kryvbas...

Susquehanna The Coal Region is a term used to refer to an area of Northeastern Pennsylvania in the central Appalachian Mountains. The region is home to the...

A coal-seam fire is a burning of an outcrop or underground coal seam. Most coal-seam fires exhibit smouldering combustion, particularly underground coal-seam...

The history of coal mining goes back thousands of years, with early mines documented in ancient China, the Roman Empire and other early historical economies...

A coal ball is a type of concretion, varying in shape from an imperfect sphere to a flat-lying, irregular slab. Coal balls were formed in Carboniferous...