ISBN 10: 1236112008 / ISBN 13: 9781236112002
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Inhaltsangabe: 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. 1913 Excerpt: ...barren of fossils, and an upper limestone series which is very fossiliferous. These beds are well exposed in Big Cottonwood Canyon at the northern end of the Eeade and Benson ridge which separates South Fork from Day's Fork. At Green's Hill in South Fork, the lower limestone can be traced across the canyon from east to west. From the cliff which rises on the west, the following forms were obtained: Procluctus semireticulatus Productus cora Derhya sp. Hapsyphyllwm sp. The sandstone and shale which overlie this limestone member were not well exposed within the district, usually forming the bottom of gulches because of their poorer resisting qualities to weathering and being largely covered with talus and soil. No fossils were found in them, but they may have been. overlooked because of poor exposures. The sandstone, where seen, is composed of much angular material giving it the aspect of a breccia. The prevailing color of the sandstone is light yellow, straw color, while the shale which overlies it has a reddish tint. It is an interesting fact that Blackwelder has noted a similar occurrence sixty miles to the north, in Ogden Canyon, and several localities thereabouts. The exposures there are apparently better and have been carefully described. Lavender and maroon shales with abundant sun-cracks filled with mud and sand and the same brecciated appearance are noted. From these and other characters, a continental origin is suggested, the necessary conditions being found on the surface of deltas of flat gradient in regions which are either generally or seasonably arid. The presence of this non-marine member within the Mississippian was not noted until it was discovered in Ogden Canyon by Blackwelder23 in 1910, and its recognition in Big Cottonwood Canyon by the w...

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Ferdinand Friis Hintze
Verlag: RareBooksClub
ISBN 10: 1236112008 ISBN 13: 9781236112002
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Buchbeschreibung RareBooksClub. Paperback. Buchzustand: New. This item is printed on demand. Paperback. 26 pages. Dimensions: 8.8in. x 6.0in. x 0.6in.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. 1913 Excerpt: . . . barren of fossils, and an upper limestone series which is very fossiliferous. These beds are well exposed in Big Cottonwood Canyon at the northern end of the Eeade and Benson ridge which separates South Fork from Days Fork. At Greens Hill in South Fork, the lower limestone can be traced across the canyon from east to west. From the cliff which rises on the west, the following forms were obtained: Procluctus semireticulatus Productus cora Derhya sp. Hapsyphyllwm sp. The sandstone and shale which overlie this limestone member were not well exposed within the district, usually forming the bottom of gulches because of their poorer resisting qualities to weathering and being largely covered with talus and soil. No fossils were found in them, but they may have been. overlooked because of poor exposures. The sandstone, where seen, is composed of much angular material giving it the aspect of a breccia. The prevailing color of the sandstone is light yellow, straw color, while the shale which overlies it has a reddish tint. It is an interesting fact that Blackwelder has noted a similar occurrence sixty miles to the north, in Ogden Canyon, and several localities thereabouts. The exposures there are apparently better and have been carefully described. Lavender and maroon shales with abundant sun-cracks filled with mud and sand and the same brecciated appearance are noted. From these and other characters, a continental origin is suggested, the necessary conditions being found on the surface of deltas of flat gradient in regions which are either generally or seasonably arid. The presence of this non-marine member within the Mississippian was not noted until it was discovered in Ogden Canyon by Blackwelder23 in 1910, and its recognition in Big Cottonwood Canyon by the w. . . This item ships from La Vergne,TN. Paperback. Buchnummer des Verkäufers 9781236112002

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