Coal; Its Properties, Analysis, Classification, Geology, Extraction, Uses And Distribution
Coal; Its Properties, Analysis, Classification, Geology, Extraction, Uses And Distribution
Elwood S Moore
The book Coal; Its Properties, Analysis, Classification, Geology, Extraction, Uses And Distribution was written by author Elwood S Moore Here you can read free online of Coal; Its Properties, Analysis, Classification, Geology, Extraction, Uses And Distribution book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is Coal; Its Properties, Analysis, Classification, Geology, Extraction, Uses And Distribution a good or bad book?
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Anyone reading the descriptions of coal fields will find that if any country contains anthracite it is invariably found in its mountains or disturbed areas, and this con- dition goes a long way towards establishing the thrust-pressure hy- pothesis for the origin of anthracite. This hypothesis has in recent years been worked out in great detail by White^ for the United States, and he has shown that this is the most logical explanation for the devolatilization of coal in its second stage of devel...opment. There are certain geological factors entering into a consider- ation of such a hypothesis which have not always been given due consideration. In almost any coal field there will be found a series of sediments made up of heavy, strong beds, such as sandstones or conglomerates, known as the competent beds; and others, such as coal and shale, which comprise the incompetent beds. When pressure is applied to these strata the incompetent beds yield and adapt them- selves to the movements of the competent beds which are sufficiently strong to resist buckling.
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