The University Geological Survey of Kansas
The University Geological Survey of Kansas
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In our eReader you can find the full English version of the book. Read The University Geological Survey of Kansas 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 University Geological Survey of Kansas
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In much rarer cases the bell is reversed — Figure 35 — the base protruding into the coal while the apex extends up- ward into the superincumbent shale. In such cases they pro- duce what is more often called a ''roll.'' Figures 36 and 37.
This is rather a dangerous form as the roof is liable to cave in, but due to the scarcity of this form of bells few or no accidents occur on account of them.
FiQUBE 35. loyerted Type of Bell, as seen in Mine West of Prescott.
Nature of Lateral Portions.
The sid...es of the bells are as a rule very smooth and polished.
The coal adjacent to the bell is also very smooth. There is nothing in connection with the bell or adjacent coal to indicate that there has been any displacement. The laminae of the coal show no signs of having been displaced by lateral or vertical pressure, but extend up to the bell where they stop abruptly, Digitized by Google 216 University of Kansas Geological Survey.
but continue again on the opposite side without any apparent break in their order.
What to read after The University Geological Survey of Kansas?
You can find similar books in the "Read Also" column, or choose other free books by Kansas Geological Survey to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
In much rarer cases the bell is reversed — Figure 35 — the base protruding into the coal while the apex extends up- ward into the superincumbent shale. In such cases they pro- duce what is more often called a ''roll.'' Figures 36 and 37.
This is rather a dangerous form as the roof is liable to cave in, but due to the scarcity of this form of bells few or no accidents occur on account of them.
FiQUBE 35. loyerted Type of Bell, as seen in Mine West of Prescott.
Nature of Lateral Portions.
The sid...es of the bells are as a rule very smooth and polished.
The coal adjacent to the bell is also very smooth. There is nothing in connection with the bell or adjacent coal to indicate that there has been any displacement. The laminae of the coal show no signs of having been displaced by lateral or vertical pressure, but extend up to the bell where they stop abruptly, Digitized by Google 216 University of Kansas Geological Survey.
but continue again on the opposite side without any apparent break in their order.
What to read after The University Geological Survey of Kansas?
You can find similar books in the "Read Also" column, or choose other free books by Kansas Geological Survey to read onlineMoreLess
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