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. 1921 Excerpt: ...at that time capable of furnishing such sediment. The pebbles are in general much larger and of a greater variety of material in these centers of origin, decreasing in size as we pass away and becoming the Mississippian (Pocono and Mauch Chunk), and the Pottsville copglomeratr and higher Coal-measure strata. (Original) ...
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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. 1921 Excerpt: ...at that time capable of furnishing such sediment. The pebbles are in general much larger and of a greater variety of material in these centers of origin, decreasing in size as we pass away and becoming the Mississippian (Pocono and Mauch Chunk), and the Pottsville copglomeratr and higher Coal-measure strata. (Original) """"-Pi mostly pure, well-rounded quartz. The lowest division (Pocahontas) is represented only in the two eastern districts noted; the next division overlaps it from both centers in all directions, away from the source of supply, and comes to rest upon the somewhat eroded surface of the Mississippian, beyond the area covered by the lower division. The third division overlaps the second in the same way, the beds of the two fans becoming more or less confluent in the region between the two centers; and the fourth division overlaps the third and has the greatest extent. This FIG. 139 5.--Ideal section of the Pottsville alluvial fan, showing the northwestward overlap of the successive members. The overlap is away from the source of supply, which was Appalachia on the east. (Original.) division alone is represented in southwestern New York (Olean conglomerate, Figs. 1396, 1397), and in western Pennsylvania and Ohio (Sharon conglomerate). The several divisions are distinguished by their characteristic plant-bearing beds, which are either present as intercalated layers, or form the roof shales of more or less important coal seams in the series. The Kanawha Series.--West of Ohio the typical Pottsville appears to be absent, being overlapped by beds of the next succeeding series, the Kanawha. This series is likewise most extensively developed in the eastern region, being at present known FIG. 1396.--Olean conglomerate, Rock City, ne...
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PLEASE NOTE, WE DO NOT SHIP TO DENMARK. New Book. Shipped from UK in 4 to 14 days. Established seller since 2000. Please note we cannot offer an expedited shipping service from the UK.
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