Structural And Field Geology, for Students of Pure And Applied Science
Structural And Field Geology, for Students of Pure And Applied Science
Geikie, James, 1839-1915
The book Structural And Field Geology, for Students of Pure And Applied Science was written by author Geikie, James, 1839-1915 Here you can read free online of Structural And Field Geology, for Students of Pure And Applied Science book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is Structural And Field Geology, for Students of Pure And Applied Science a good or bad book?
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To sum up in a few words, it may be said that the chief chemical changes induced in rocks by the process of weathering, consist of solution, oxydation, hydration, and the formation of carbonates and sulphates. Metamorphism. The changes brought about by epigene action, however extreme they may be, must not be confounded with true metamorphism. The term " metamorphic " is applied properly to rocks, the texture, structure, and mineralogical constitution of which have been more or less profoundly a...ffected. Metamorphism, however, varies much in its intensity. It may be so inconsiderable as not to obscure all original characters, or so extreme that we can only conjecture what the nature of the unaltered rock may have been. True metamorphism, especially that which has resulted in crystallisation and recrystallisation and the pro- duction of foliation, would seem to have taken place at some depth from the surface, and to have been induced proximately by heat, usually if not always in the presence of water or vapours.
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