Elements of Chemical And Physical Geology volume 3
Elements of Chemical And Physical Geology volume 3
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In our eReader you can find the full English version of the book. Read Elements of Chemical And Physical Geology volume 3 Online - link to read the book on full screen. Our eReader also allows you to upload and read Pdf, Txt, ePub and fb2 books. In the Mini eReder on the page below you can quickly view all pages of the book - Read Book Elements of Chemical And Physical Geology volume 3
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Although in several instances the melaphyr does not present any apparent alteration at its surface of contact with other rocks, still the effervescence with acids shows that alteration has really taken place ; and when lime has been separated as carbonate, the silica with which it was combined may also have been removed, unless the place of the lime had been taken by another base for instance, magnesia or potash and some other mineral produced. As a general rule, calc-spar and brown-spar occur ...in the melaphyr described by Credner, sometimes as veins, and more frequently as nodules and hollow masses. But when the melaphyr is amygdaloid, the crystalline character is less marked, and the * Op. Cit. , p. 470. T N. Jahrb. Fur Mineral, etc. 1843, p. 291.
ANALYSIS OF AUGITIC ROCKS. 211 matrix becomes a ferruginous clay. This description shows distinctly the connection between the presence of calc-spar, and brown-spar, and the decomposition of the rock. It seems in such instances impossible to assume that these spathic minerals have penetrated into the rock from below, when the substance of which they consist is precisely that of which the ferruginous clay is deficient, except that it exists in the state of carbonates instead of as silicates.
What to read after Elements of Chemical And Physical Geology volume 3?
You can find similar books in the "Read Also" column, or choose other free books by Gustav Bischof to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
Although in several instances the melaphyr does not present any apparent alteration at its surface of contact with other rocks, still the effervescence with acids shows that alteration has really taken place ; and when lime has been separated as carbonate, the silica with which it was combined may also have been removed, unless the place of the lime had been taken by another base for instance, magnesia or potash and some other mineral produced. As a general rule, calc-spar and brown-spar occur ...in the melaphyr described by Credner, sometimes as veins, and more frequently as nodules and hollow masses. But when the melaphyr is amygdaloid, the crystalline character is less marked, and the * Op. Cit. , p. 470. T N. Jahrb. Fur Mineral, etc. 1843, p. 291.
ANALYSIS OF AUGITIC ROCKS. 211 matrix becomes a ferruginous clay. This description shows distinctly the connection between the presence of calc-spar, and brown-spar, and the decomposition of the rock. It seems in such instances impossible to assume that these spathic minerals have penetrated into the rock from below, when the substance of which they consist is precisely that of which the ferruginous clay is deficient, except that it exists in the state of carbonates instead of as silicates.
What to read after Elements of Chemical And Physical Geology volume 3?
You can find similar books in the "Read Also" column, or choose other free books by Gustav Bischof to read onlineMoreLess
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