This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1882 Excerpt: ...worked at these shafts, as well as all others at present in operation in this county, is, in my opinion, No. 5 of the general section of the Coal Measures of Western Illinois, as given in the first volume of these reports. In the central portions of the county its thickness ranges from six to eight feet, but on Apple ...
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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1882 Excerpt: ...worked at these shafts, as well as all others at present in operation in this county, is, in my opinion, No. 5 of the general section of the Coal Measures of Western Illinois, as given in the first volume of these reports. In the central portions of the county its thickness ranges from six to eight feet, but on Apple creek, in the northwest corner of the county, a coal outcrops that seems to be the equivalent of this, but is much thinner, ranging only from two to three feet, and at Howard's shaft, one mile and a half north of Bunker Hill, its average thickness is about four feet. At the Virden shaft the main coal (No. 36 of this section) averages about seven feet and a half in thickness, sometimes running up to eight feet, and seldom falling below seven. It is a moderately soft, free-burning coal, especially that from the upper portion of the seam, from two to three feet in thickness, which is an excellent smith's coal. The seam is divided by a shaly parting about an inch in thickness, which is very persistent, and about one-third the distance from the bottom to the. top of the seam. The coal has a tendency to break into cubic blocks, like the Belleville coal, though the partings which separate the coal into several distinct layers are not as decided here as at the mines in St. Clair and Randolph counties. No horsebacks or other impediments to the profitable working of this coal has yet been encountered in this shaft. Salt water in small quantities percolates through some of the sandstones above the coal, especially above Nos. 19 and 33. The roof consists first, of a dark-blue clay shale, sometimes passing into a hard black slaty shale, an inch or two in thickness, resting directly on the coal. This clay shale varies in thickness from two to thr...
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Add this copy of Economical Geology of Illinois: Reprinted From the to cart. $65.63, good condition, Sold by Bonita rated 4.0 out of 5 stars, ships from Santa Clarita, CA, UNITED STATES, published 2010 by Nabu Press.
