Shippen And Wetherill Tract
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. . . . , 6 4 6 The coal here, then, is at least 2 feet thick ; but apparently the black dirt above it is merely coal, perhaps somewhat slaty, decom- posed by atmospheric influences, and should be added to the rest, making a thickness of 3 feet 4 inches, in the same total thickness.
At the old diamond drill hole, a thickness of only about 9 inches was found for this bed according to the record. It is, of course, not impossible that the bed should be thinner there ; but it is also per- haps poss...ible that a portion of the bed may have been overlooked. At the Palmer tunnel, this bed is given by Rogers (vol. Ii. , p. 103) as 5J feet thick ; and by the present State Geological Survey's South- 26 era Coal Field Columnar Section Sheet IV. , as 5 feet. The same sheet gives it as 5 feet and 5 feet 2 inches in two tunnels at Buck- ville, and as 4 feet 10 inches at the Northdale tunnel, and 4 feet at the Kaska William shaft.
It is certain then, that the bed is of workable thickness and qual- ity on the tract at the log road, and on the whole quite probably so all over its area on the tract with an average thickness of 3J feet (the mean of 3 feet 9 inches and 3 feet 4 inches).
What to read after Shippen And Wetherill Tract?
You can find similar books in the "Read Also" column, or choose other free books by Benjamin Smith Lyman to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
. . . . , 6 4 6 The coal here, then, is at least 2 feet thick ; but apparently the black dirt above it is merely coal, perhaps somewhat slaty, decom- posed by atmospheric influences, and should be added to the rest, making a thickness of 3 feet 4 inches, in the same total thickness.
At the old diamond drill hole, a thickness of only about 9 inches was found for this bed according to the record. It is, of course, not impossible that the bed should be thinner there ; but it is also per- haps poss...ible that a portion of the bed may have been overlooked. At the Palmer tunnel, this bed is given by Rogers (vol. Ii. , p. 103) as 5J feet thick ; and by the present State Geological Survey's South- 26 era Coal Field Columnar Section Sheet IV. , as 5 feet. The same sheet gives it as 5 feet and 5 feet 2 inches in two tunnels at Buck- ville, and as 4 feet 10 inches at the Northdale tunnel, and 4 feet at the Kaska William shaft.
It is certain then, that the bed is of workable thickness and qual- ity on the tract at the log road, and on the whole quite probably so all over its area on the tract with an average thickness of 3J feet (the mean of 3 feet 9 inches and 3 feet 4 inches).
What to read after Shippen And Wetherill Tract?
You can find similar books in the "Read Also" column, or choose other free books by Benjamin Smith Lyman to read onlineMoreLess
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