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Articles related to coal

Coal - Sedimentary Rock Types - Geology - About.com
Coal is one of the major types of sedimentary rocks. Page 9.
http://geology.about.com/od/rocks/ig/sedrockindex/rocpiccoal.htm
Coal Geology - About.com
Coal in a Nutshell What coal is, where and how it forms, and the story it tells geologists. Coal in the Home Americans don't burn coal at home any more, but it still ...
http://geology.about.com/od/coal/
Coal in a Nutshell - Geology - About.com
Like petroleum, coal is an enormously valuable mineral resource, used for hundreds of years in industry. And also like petroleum, the Web has lots of information ...
http://geology.about.com/od/mineral_resources/a/aa_nutshellcoal.htm
Coal Varieties - Composition, Global Usage, Energy Value
Coal is a sedimentary black or dark brown rock that varies in composition. Some types of coal burn hotter and cleaner, while others contain high moisture ...
http://energy.about.com/od/Coal/a/All-Coal-Is-Not-Created-Equal.htm
Sub-Bituminous Coal Characteristics - Energy - About.com
Sub-bituminous coal is considered a black coal, although its appearance varies from bright black to dull dark brown. Its consistency ranges from hard and strong  ...
http://energy.about.com/od/Coal/a/Sub-Bituminous-Coal.htm
Bituminous Coal Characteristics and Applications
Bituminous coal is the most common coal. Bituminous and sub-bituminous coal together represent more than 90 percent of all the coal consumed in the U.S. ...
http://energy.about.com/od/Coal/a/Bituminous-Coal.htm
Anthracite Coal - Highest Ranked Coal in Short Supply - Energy
Characteristics of anthracite coal, the highest ranked coal for heat content.
http://energy.about.com/od/Coal/a/Anthracite-Coal.htm
Coal - Mining - About.com
For a global overview on coal related issues, I suggest you read this "Basic Kit" first. Can't find what you're looking for? Just Coal me! ...or use the forum to ask ...
http://mining.about.com/od/Coal/
Anthracite Coal - Ranking #1 - Energy - About.com
Anthracite Coal - Ranking #1. Anthracite coal chunk. Chunk of anthracite coal. Photo (C) ornl.gov. Anthracite is the hardest and most brittle of all coals, and when ...
http://energy.about.com/od/Coal/ss/Coal-Ranked-By-Energy-Content-And-Carbon-Content_2.htm
Coal - Energy - About.com
Coal is a combustible dark rock formed underground by geologic processes. Coal is a finite, carbon-based energy resource that is burned to produce steam, ...
http://energy.about.com/od/Coal/
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