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. 1878 Excerpt: ...at b, 3,040 feet from a the starting point. One hundred feet of it (measured perpendicular to bedding) are visible. It consists of fine grains of quartz, debris of the old crystalline schists ground almost to powder, with numerous spangles of micaceous iron ore. Over this lie 1520 feet (actual thickness) of a more ...
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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. 1878 Excerpt: ...at b, 3,040 feet from a the starting point. One hundred feet of it (measured perpendicular to bedding) are visible. It consists of fine grains of quartz, debris of the old crystalline schists ground almost to powder, with numerous spangles of micaceous iron ore. Over this lie 1520 feet (actual thickness) of a more earthy slate, containing much more greenish matter, casts of pyrites and undecomposed pyrites imbedded in it. Note.--Here (at c) a dip north 20 west--70 was observed marking a disturbance, the exact shape and size of which could not be made out, for want of other exposures. It cannot be of great importance, seeing that, for the next 1,200 feet all the observed, dips are again to the south, (from south to south 15 east, ) and of the usual force (from 50 to 68). In this first part of the section, then, we see a mass of quartzite passing upwards into sandy slates and argillites, about 5,000 feet thick, dipping southward down the river, at an angle of about 45, increasing in steepness (but not with any apparent regularity) to 70. Limestone sets in (at d) with an exposure 3"0 feet south of the last or highest observed outcrop of slate, (the slate dipping south 10 east--50, and the limestone the same, ) and in the banks of a small streamf entering the river half a mile above the Columbia bridge. The bed of this run must coincide closely with the line of contact of slate and limestone. Limestone quarries are numerous for the next 1,600 feet of section. The strata are well exposed with dips to the south (from south 10 east, to south 15 east) and steep. The steepness of the dip constantly increases, following this range of exposures down the river side, being at first 56, then 66, at Kerr & Cook's quarry e) south 4 east--76, and in the town 600 feet...
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Add this copy of Report of Progress in the District of York and Adams to cart. $46.69, good condition, Sold by Bonita rated 4.0 out of 5 stars, ships from Newport Coast, CA, UNITED STATES, published 2012 by Nabu Press.
