Report of Progress ..., Volume 5

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Board of Commissioners for the Second Geological Survey, 1880
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Page iv - HC LEWIS— Volunteer geologist for the survey of the gravel deposits of south-eastern Pennsylvania. LEO LESQUEREUX— Fossil Botanist, Columbus, Ohio. EB HARDEN— Topographer in charge of Office Work, <fec.
Page 220 - Ball ore occurs under the regular bed. ' ' 357. The ore was mainly worked by the Company on the high plateau between Holder's run and Greenville run. It extends also west of Holder's run, and apparently in good condition. Towards the south its horizon is under all the high land of Sugar Creek township. It was once worked in the region west from Buffalo mills. North of Sugar creek its run is obscure, probably by reason of its diminished thickness there. A chemical analysis by Mr. McCreath of a...
Page lviii - The carbonates unroasted average from 33 to 38 per cent of metallic iron ; the brown and red ores contain as high 50 per cent of iron, the average being perhaps about 45 per cent. All of the ores are comparatively low in phosphorus — two tenths of one per cent being the usual amount, both in the carbonates and hematites. The sulphur is also low, amounting in many cases to scarcely more than a trace. The hematites contain none of the protoxide of iron. The poor quality of iron made from these ores...
Page 218 - I believe, to the local strain of the dip, and the local composition of the stratum. The law governing the number of these cleavage planes is a simple one ; the distance of the clefts from one another is, in the main, proportionate to the massiveness of the strata which they divide ; that is, the cleavage planes of the great beds of massive sandrocks lie much further asunder than those of the thin-bedded sandstones ; while those subdividing beds of shale are still closer to each other and more numerous....

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