The Wonders of Geology: Or, a Familiar Exposition of Geological Phenomena : Being the Substance ...
The Wonders of Geology: Or, a Familiar Exposition of Geological Phenomena : Being the Substance ...
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In our eReader you can find the full English version of the book. Read The Wonders of Geology: Or, a Familiar Exposition of Geological Phenomena : Being the Substance ... 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 Wonders of Geology: Or, a Familiar Exposition of Geological Phenomena : Being the Substance ...
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The chief constituents of lavas are the substances termed felspar and augitey and titaniferotis iroiiy and the lavas are classed according as either of these ingredients predominates. When the felspar prevails, the mass is called Trachyte^ which is generally of a coarse grain, with a harshness of texture, and a degree of porosity ; when the grain is fine and compact, but irregular, it constitutes Trachytic Porphyry ; when the particles are so fused as to have a resinous or glassy texture, it fo...rms Pitchstone and Obsidian. If Augite or titaniferovs iron constitute a large proportion of a rock, it is termed Basalt ; and when the § 9. LAVA CUttllEBJTS, DIKES, ABB VBllfS. ^IT structure is slaty, Clinkstone. The same substance forms augite when it cools rap idly, and hornblende when the refrigeration takes place slowly- The lavas ejected from Yesuviufl present considerable variety of appearance and composition : they occur in the state of pumice-stone ; vesicular acoriscj that is, cinders full of hollow ceDa ; and compact heavy masses of molten rock, which are sometimes spotted internally with red, yellow, and grey.
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To quickly assess the difficulty of the text, read a short excerpt:
The chief constituents of lavas are the substances termed felspar and augitey and titaniferotis iroiiy and the lavas are classed according as either of these ingredients predominates. When the felspar prevails, the mass is called Trachyte^ which is generally of a coarse grain, with a harshness of texture, and a degree of porosity ; when the grain is fine and compact, but irregular, it constitutes Trachytic Porphyry ; when the particles are so fused as to have a resinous or glassy texture, it fo...rms Pitchstone and Obsidian. If Augite or titaniferovs iron constitute a large proportion of a rock, it is termed Basalt ; and when the § 9. LAVA CUttllEBJTS, DIKES, ABB VBllfS. ^IT structure is slaty, Clinkstone. The same substance forms augite when it cools rap idly, and hornblende when the refrigeration takes place slowly- The lavas ejected from Yesuviufl present considerable variety of appearance and composition : they occur in the state of pumice-stone ; vesicular acoriscj that is, cinders full of hollow ceDa ; and compact heavy masses of molten rock, which are sometimes spotted internally with red, yellow, and grey.
What to read after The Wonders of Geology: Or, a Familiar Exposition of Geological Phenomena : Being the Substance ...?
You can find similar books in the "Read Also" column, or choose other free books by Gideon Algernon Mantell to read onlineMoreLess
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