[DOC] [TLE] How Coal Works | Union of Concerned Scientists [PAR] Lignite has a low energy content, typically about 13 million Btu per ton. ... The 
hardest coal, anthracite, is found mostly in Pennsylvania, but most supplies of ... 
As can be seen on the map of coal fields in the U.S., bituminous coal comes 
mostly... [DOC] [TLE] Coal - Wikipedia [PAR] Coal is a combustible black or brownish-black sedimentary rock usually 
occurring in rock strata in layers or veins called coal beds or coal seams. The 
harder forms, such as anthracite coal, can be regarded as metamorphic .... "
Steam coal" is a grade between bituminous coal and anthracite, once widely 
used as a fuel for... [DOC] [TLE] Coal: Anthracite, Bituminous, Coke, Pictures, Formation, Uses [PAR] In this photo you can see bright and dull bands of coal material oriented ... Sub 
bituminous coal is a lignite that has been subjected to an increased level of... [DOC] [TLE] Subbituminous and bituminous coal dominate U.S. coal production ... [PAR] Aug 16, 2011 ... Lignite coal is typically comprised of coal deposits which have had the ... 
Anthracite: Anthracite has the highest carbon content (86% to 97%). [DOC] [TLE] Classification and Rank of Coal . University of Kentucky [PAR] The kinds of coal, in increasing order of alteration, are lignite (brown coal--
immature), sub-bituminous, bituminous, and anthracite (mature). Coal starts off as
... [DOC] [TLE] coal characteristics - Purdue University [PAR] (1) Anthracite. (2) Bituminous. (3) Sub-bituminous. (4) Lignite. Source: ... 
anthracite forms from bituminous coal when great .... Vitrinite reflectance can be 
used. [DOC] [TLE] Quia - APES Ch12 Vocabulary [PAR] turbine, a device with blades that can be turned by water, wind, steam or ... It is a 
greater polluter than bituminous coal because it has a higher sulfur content. ... It 
is of higher quality than lignite coal but of poorer quality than anthracite coal. [DOC] [TLE] coal facts, information, pictures | Encyclopedia.com articles about coal [PAR] Coal is usually classified into subgroups known as anthracite, bituminous, lignite, 
and ... Lignite: Brown coal; a form of coal with less heat content and pure carbon 
.... Surface mining can be used when a coal seam is close enough to Earth's... [DOC] [TLE] DOE - Fossil Energy: A Brief Overview of Coal [PAR] Feb 12, 2013 ... The United States has more coal that can be mined than the rest of the ... mined 
today are: anthracite, bituminous, subbituminous, and lignite. [DOC] [TLE] Coal Energy [PAR] energy in coal comes from the energy stored by plants that lived hundreds of 
millions of ... Coal is classified into four main types, or ranks (lignite, 
subbituminous, ... Bituminous coal contains 45-86 percent carbon, and has two to 
three times the ... percent of the coal mined in the U.S. All of the anthracite mines 
in the United... [DOC] [TLE] coal - National Geographic Society [PAR] Dec 22, 2012 ... Like lignite, sub-bituminous coal is mainly used as fuel for generating ... 
Anthracite can typically be found in geographical areas that have... [DOC] [TLE] Fossil Energy Study Guide: Coal - Department of Energy [PAR] States has more energy in coal that can be mined than the rest of the world has in 
oil that can ... The four types (or ranks) of coal mined today are: anthracite, 
bituminous, ... coal. It gives off a little more energy (heat) than lignite when it 
burns. It. [DOC] [TLE] Coal - Maryland Energy Administration - Maryland.gov [PAR] Freshly-mined anthracite usually contains less than 15 percent moisture content. 
... Sub-bituminous: This coal can be dull, dark brown to black in color and soft 
and ... coal has properties ranging from the properties of lignite or bituminous 
coal. [DOC] [TLE] Alberta Energy: What is coal? [PAR] Lignite and subbituminous coal (brown coal) are low-ranked coals ... Bituminous 
coal and anthracite (hard coals) are high-ranked coals ... Anthracite,

Question: ...with this energy source that can be lignite, bituminous or anthracite
Answer: coal