. Bulletin of the Buffalo Society of Natural Sciences. Natural history; Science. ' ⢠"' â ' F. Houghton, Photo. Fig. 37. Beach south of Springville, probably formed by a lake which occupied the upper valley of Cattaraugus creek. As the ice receded, a lower pass than that at Machias was uncovered at the head of the valley of the south branch of Cattaraugus creek. The consequent stream flowed southward over the divide at Persia at an altitude of 1300 feet and emptied into the Allegheny. There finally came a time when the lowest edge of the trough which still existed between the north
. Bulletin of the Buffalo Society of Natural Sciences. Natural history; Science. ' ⢠"' â ' F. Houghton, Photo. Fig. 37. Beach south of Springville, probably formed by a lake which occupied the upper valley of Cattaraugus creek. As the ice receded, a lower pass than that at Machias was uncovered at the head of the valley of the south branch of Cattaraugus creek. The consequent stream flowed southward over the divide at Persia at an altitude of 1300 feet and emptied into the Allegheny. There finally came a time when the lowest edge of the trough which still existed between the northward sloping land and the southward facing glacier fell below the level of 1300 feet. Thereupon the waters which had been escaping over the divide at this level immediately overflowed at the lower levels which. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Buffalo Society of Natural Sciences. Buffalo, N. Y. : Buffalo Society of Natural Sciences
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