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. 1912 Excerpt: ...which have been assigned to the Carboniferous, in part on physical and in part on paleontologic evidence, and which consist of arkose, conglomerate, sandstone, and slate. The rocks were described by Crosby 182a, nd have been made the subject of a very detailed study by Mansfield,570 who has given special attention to ...
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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. 1912 Excerpt: ...which have been assigned to the Carboniferous, in part on physical and in part on paleontologic evidence, and which consist of arkose, conglomerate, sandstone, and slate. The rocks were described by Crosby 182a, nd have been made the subject of a very detailed study by Mansfield,570 who has given special attention to the origin and distinguishing characteristics of the conglomerates. He describes them under the headings "Roxbury series," "Norfolk Basin series," "Narragansett Basin series," and "Harvard conglomerate." These distinctions are areal rather than stratigraphic and are made because in the absence of fossils and under the conditions of occurrence exact stratigraphic correlation among the small areas of outcrop was not practicable. Mansfield 570a concludes that--The evidence adduced in the preceding paragraphs as to origin is largely negative and unsatisfactory. The bedding and texture of the sediments, though attaining a fair degree of regularity, do not display these features in so high a degree of development as might be expected in true marine strata. The apparent gradation upward from coarse to fine texture in the Boston Basin, suggestive of marine transgression, is offset by the occurrence in the Narragansett Basin of a gradation in the opposite direction, suggestive of nonmarine deposition. The fossils thus far found in the Narragansett and Norfolk basins are indicative of nonmarine rather than of marine origin. Similar evidence is borne by the irregularities of bedding and of texture. The lithological similarity of the Roxbury conglomerate to the rocks of the Norfolk and Narragansett basins makes it probable that all are of like origin and that the entire Carboniferous series of this region is nonmarine...
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Add this copy of Index to the Stratigraphy of North America to cart. $19.27, poor condition, Sold by Anybook rated 5.0 out of 5 stars, ships from Lincoln, UNITED KINGDOM, published 1912 by Washington Government Printing Office.
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Seller's Description:
This is an ex-library book and may have the usual library/used-book markings inside. This book has hardback covers. In poor condition, suitable as a reading copy. No dust jacket. Re-bound by library. Please note the Image in this listing is a stock photo and may not match the covers of the actual item, 3150grams, ISBN:
Add this copy of Index to the Stratigraphy of North America (Usgs to cart. $70.00, Sold by Weller Book Works, A.B.A.A. rated 4.0 out of 5 stars, ships from Salt Lake City, UT, UNITED STATES, published 1912 by Government Printing Office.
Edition:
1912, Government Printing Office
Details:
Publisher:
Government Printing Office
Published:
1912
Language:
English
Alibris ID:
17142301199
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Seller's Description:
8. Includes (in separate folder) the 'Geologic Map of North America' with which the original title was accompanied.
