A Text book of Geology Designed for Schools And Academies
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In our eReader you can find the full English version of the book. Read A Text book of Geology Designed for Schools And Academies 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 A Text book of Geology Designed for Schools And Academies
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In the central portions of the Interior-Continental region the thickness varies from 3, 500 feet (and still less on the northern border) to 6, 000 feet ; and it is, therefore, from one sixth to one tenth that in the Appalachian region.
4. Origin of the deposits. The material of the fragmental rocks, or those of sand, clay, mud, pebbles (the sandstones, shales, earthy sandstones and conglomerates), was "made (1) by the wear of pre-existing rocks under the action of water ; (2) by disintegration ...produced by partial decomposition ; and (3) by disaggregation from expansion and contraction due to daily and annual changes of temperature. The water was mainly that of the ocean, and the power was that of its waves and currents. But the water from the rains aided in the wear, although there were no large rivers ; and, through the carbonic acid it took up from the atmosphere, it was a great agent in the disintegration of exposed rocks, feldspar, the most common ingredient in crystalline rocks and also nearly all iron-bearing minerals, yielding more or less easily under the action.
What to read after A Text book of Geology Designed for Schools And Academies?
You can find similar books in the "Read Also" column, or choose other free books by James Dwight Dana to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
In the central portions of the Interior-Continental region the thickness varies from 3, 500 feet (and still less on the northern border) to 6, 000 feet ; and it is, therefore, from one sixth to one tenth that in the Appalachian region.
4. Origin of the deposits. The material of the fragmental rocks, or those of sand, clay, mud, pebbles (the sandstones, shales, earthy sandstones and conglomerates), was "made (1) by the wear of pre-existing rocks under the action of water ; (2) by disintegration ...produced by partial decomposition ; and (3) by disaggregation from expansion and contraction due to daily and annual changes of temperature. The water was mainly that of the ocean, and the power was that of its waves and currents. But the water from the rains aided in the wear, although there were no large rivers ; and, through the carbonic acid it took up from the atmosphere, it was a great agent in the disintegration of exposed rocks, feldspar, the most common ingredient in crystalline rocks and also nearly all iron-bearing minerals, yielding more or less easily under the action.
What to read after A Text book of Geology Designed for Schools And Academies?
You can find similar books in the "Read Also" column, or choose other free books by James Dwight Dana to read onlineMoreLess
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