Abstract
IF Mr. Williams is right, and the “hog-wallows” are simply American cousins of our “eshars” or “kames,” is it not reasonable to credit that “atmospheric erosion” to which Prof. Le Conte attributes the formation of the former with a much more important influence upon the shapes of the latter than British geologists generally seem disposed to accord to it? It is very difficult to conceive that mounds of loose sand and gravel, whether in valleys or on plains, should have retained the impress of the glacier or the iceberg throughout the vast time that must have elapsed since these phenomena entirely disappeared. And if it be conceded that these mounds have been modified in any degree by subaërial denudation, it will be found difficult to limit the extent to which they are indebted to it for their present forms, or indeed to deny that it alone may have shaped them.
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DURHAM, J. Hog-Wallows and Prairie Mounds. Nature 16, 24 (1877). https://doi.org/10.1038/016024b0
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DOI: https://doi.org/10.1038/016024b0
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