Manual of Geology Treating of the Principles of the Science With Special Refere
Manual of Geology Treating of the Principles of the Science With Special Refere
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In our eReader you can find the full English version of the book. Read Manual of Geology Treating of the Principles of the Science With Special Refere 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 Manual of Geology Treating of the Principles of the Science With Special Refere
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Hence, as H. S. Williams has said, " the actual order of faunas met with in a vertical section is not necessarily expressive of biological sequence, but only of the sequence of the occupants of that particular area. " Such recurrences of species are likely to be met with in all regions where fine shales, coarse shales, argillaceous sandstones, quartzose sandstones, with or without limestones of varying purity, are in alternation.
3. The difference in the time at which species or groups have beg...un to exist in different regions. The several continents may not have been exactly parallel, in all the steps of progress in the life of the globe. Certain families may have commenced a little earlier in one than in another ; or again, one conti- nental sea or region, over a continent, may have received some of its species by migration from another, long after their first appearance. Here is a source of doubt : what may be due, on one side, to special continental idiosyn- crasies in condition or history, and, on the other, to migrational distribu- tion, is always to be carefully considered.
What to read after Manual of Geology Treating of the Principles of the Science With Special Refere?
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:
Hence, as H. S. Williams has said, " the actual order of faunas met with in a vertical section is not necessarily expressive of biological sequence, but only of the sequence of the occupants of that particular area. " Such recurrences of species are likely to be met with in all regions where fine shales, coarse shales, argillaceous sandstones, quartzose sandstones, with or without limestones of varying purity, are in alternation.
3. The difference in the time at which species or groups have beg...un to exist in different regions. The several continents may not have been exactly parallel, in all the steps of progress in the life of the globe. Certain families may have commenced a little earlier in one than in another ; or again, one conti- nental sea or region, over a continent, may have received some of its species by migration from another, long after their first appearance. Here is a source of doubt : what may be due, on one side, to special continental idiosyn- crasies in condition or history, and, on the other, to migrational distribu- tion, is always to be carefully considered.
What to read after Manual of Geology Treating of the Principles of the Science With Special Refere?
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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