The Natural System of Volcanic Rocks
The Natural System of Volcanic Rocks
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In our eReader you can find the full English version of the book. Read The Natural System of Volcanic Rocks 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 The Natural System of Volcanic Rocks
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I will attempt to 20 If we consider the geological features of all large accumulations of eruptive rocks, such as the great amlesitic ranges of Hungary, or the quartzose porphyry composing a plateau of great dimensions in southern Tyrol, or those granitic masses which, by overlying the edges of stratified rocks, give evidence of having been ejected to the surface in a liquid state it would appear that their emission has been a slow and mainly a quiet process of long duration, hardly attended by... those con- vulsions and paroxysms which form the prominent features of volcanic action, and should have been no less characteristic of massive eruptions if they hud been due in any large measure to the expansive force of vapor. The process of the emission of the rocky matter has, it is true, been evidently intermittent in most cases, as may be inferred from the occurrence of vast accumulations of breccia, and it appears that an extensive solfataric action has frequently taken place through neighboring fissures ; but the manner in which the matter was protruded through the mnin fissures and deposited on the surrounding parts of the surface, had evidently no similarity to the mode of ejection of scoria, ashes, aud lava from most of the active volca- noes.
What to read after The Natural System of Volcanic Rocks?
You can find similar books in the "Read Also" column, or choose other free books by Ferdinand Richthofen to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
I will attempt to 20 If we consider the geological features of all large accumulations of eruptive rocks, such as the great amlesitic ranges of Hungary, or the quartzose porphyry composing a plateau of great dimensions in southern Tyrol, or those granitic masses which, by overlying the edges of stratified rocks, give evidence of having been ejected to the surface in a liquid state it would appear that their emission has been a slow and mainly a quiet process of long duration, hardly attended by... those con- vulsions and paroxysms which form the prominent features of volcanic action, and should have been no less characteristic of massive eruptions if they hud been due in any large measure to the expansive force of vapor. The process of the emission of the rocky matter has, it is true, been evidently intermittent in most cases, as may be inferred from the occurrence of vast accumulations of breccia, and it appears that an extensive solfataric action has frequently taken place through neighboring fissures ; but the manner in which the matter was protruded through the mnin fissures and deposited on the surrounding parts of the surface, had evidently no similarity to the mode of ejection of scoria, ashes, aud lava from most of the active volca- noes.
What to read after The Natural System of Volcanic Rocks?
You can find similar books in the "Read Also" column, or choose other free books by Ferdinand Richthofen to read onlineMoreLess
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