Elements of Geology
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In our eReader you can find the full English version of the book. Read Elements of Geology 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 Geology
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The gravels have all a light ferruginous tint, and can only be distinguished in certain localities from true tertiary gravel by the recentness of their fossils, or by some circumstance of position or mode of aggregation.
•259. Much uncertainty prevails with respect to the origin and aggregation of these ossiferous sands and gravels.
Many of them are no doubt local, and have been formed by the action of rivers, the silting up of lakes and other extensive shallows ; and could such be separated fr...om those which appear to have been accumulated by some very powerful and extensive agency, the task were greatly sim- plified. Unluckily, however, this seems to remain an insuperable difficulty, so that geologists are compelled to class together all deposits of ancient ossiferous gravel into one group, without much regard to the agencies concerned in their accumulation. This grouping is rendered still more indefinite by the assertion of some eminent geolo- gists, that ossiferous gravels have been found underneath the etratic boulder clay, conlainhig the same kind of bones with those above it.
What to read after Elements of Geology?
You can find similar books in the "Read Also" column, or choose other free books by David Page to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
The gravels have all a light ferruginous tint, and can only be distinguished in certain localities from true tertiary gravel by the recentness of their fossils, or by some circumstance of position or mode of aggregation.
•259. Much uncertainty prevails with respect to the origin and aggregation of these ossiferous sands and gravels.
Many of them are no doubt local, and have been formed by the action of rivers, the silting up of lakes and other extensive shallows ; and could such be separated fr...om those which appear to have been accumulated by some very powerful and extensive agency, the task were greatly sim- plified. Unluckily, however, this seems to remain an insuperable difficulty, so that geologists are compelled to class together all deposits of ancient ossiferous gravel into one group, without much regard to the agencies concerned in their accumulation. This grouping is rendered still more indefinite by the assertion of some eminent geolo- gists, that ossiferous gravels have been found underneath the etratic boulder clay, conlainhig the same kind of bones with those above it.
What to read after Elements of Geology?
You can find similar books in the "Read Also" column, or choose other free books by David Page to read onlineMoreLess
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