Search results
Results From The WOW.Com Content Network
Coal is mostly carbon with variable amounts of other elements, chiefly hydrogen, sulfur, oxygen, and nitrogen. [1] Coal is a type of fossil fuel, formed when dead plant matter decays into peat which is converted into coal by the heat and pressure of deep burial over millions of years. [2]
Lignite (derived from Latin lignum meaning 'wood'), often referred to as brown coal, [1] is a soft, brown, combustible sedimentary rock formed from naturally compressed peat.It has a carbon content around 25–35% [1] [2] and is considered the lowest rank of coal due to its relatively low heat content.
The rank of coal is correlated with its geologic history, as described in Hilt's law. In the ASTM system, any coal with more than 69% fixed carbon is classified by its content of carbon and volatiles. Coal with less than 69% fixed carbon is classified by its heating value. Volatiles and carbon are on a dry mineral free base; heating value is ...
The Western Kentucky is a large coal field located in the east of the United States in Kentucky. Western Kentucky represents one of the largest coal reserve in the United States having estimated reserves of 35.67 billion tonnes of coal. [1] Other rocks in the area include conglomerate, sandstone, shale, limestone. [2]
The term Western Coalfield (or Western Coal Field) is used to define the region with Pennsylvanian-age strata, largely sandstone and shale, in contrast to the Mississippian-age limestone of the adjoining and older Pennyroyal region. A transitional zone, generally defined as being part of the coalfield, is the Clifty Area, where there is no coal ...
Due to the abundant coal in the Appalachian Plateau, coal mining has been a staple of the area and has proved to be a very successful mining hub. Iron ore was once an extremely abundant natural resource but due to the thin layer of iron, over time it was mostly depleted. A very well-known natural resource of the Appalachian Plateau is its land ...
Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!
However, the Kentucky Geological Survey estimated a cumulative total of 200,000 wells in 1992, with 23,000 oil wells and 11,000 gas wells producing in 1989. The Eastern Coal Field and Western Coal Field have been the mine sites of production, with little exploration in the Jackson Purchase and Bluegrass regions. [3]