. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. 304 bulletin: museum of comparative zoology. meander cuts below the plain of its predecessor. The curves and cusps of Terrace B result from a vacillation of the meander during its. Fig. 9. down-valley progress; a rather sharp cusp being left between B 2 and B 3, while the curves from B 3 to B 9 have arcs so small as to join in a nearly straight terrace front. It may be noted that the small curves by which a nearly straight terrace front is usually formed are as a rule to be ex- pected only towards the side of a valley
. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. 304 bulletin: museum of comparative zoology. meander cuts below the plain of its predecessor. The curves and cusps of Terrace B result from a vacillation of the meander during its. Fig. 9. down-valley progress; a rather sharp cusp being left between B 2 and B 3, while the curves from B 3 to B 9 have arcs so small as to join in a nearly straight terrace front. It may be noted that the small curves by which a nearly straight terrace front is usually formed are as a rule to be ex- pected only towards the side of a valley, and less commonly on a terrace spur that advances into the valley. For example, in Figure 10 the little curves A, C, D, E, record so many positions of the meander apex, and will not now be destroyed until a later meander under-cuts them. Scarps of this kind may be called one-sweep scarps ; and their cusps, one-sweep cusps. Several similar cusps are shown in Figure 9. The longer curve, E E', cut by the advancing front of the meandering river, may be abandoned if the river is diverted by a Fig. 10. short-cut to a new course, and if so the advancing terrace spur will be smooth 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 Harvard University. Museum of Comparative Zoology. Cambridge, Mass. : The Museum
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