...What had so smoothed them I do not know, for they seemed to be ill-placed for water erosion... 
Stewart Edward White 「African Camp Fires」
...The vesicles soonrupture, leaving a small erosion which is soon covered by a thin crustunderwhich the new formation of epithelium proceeds rapidly...
U.S. Department of Agriculture 「Special Report on Diseases of Cattle」
...Then and not till then surface erosion becomes animportant factor and the profile of
the mass becomes finally rounded...
Cosmos Mindeleff 「Casa Grande Ruin」
..."Gravel" in a cavern is seldom noticeably water-worn, but is theangular débris resulting from the continued fragmentation of chertnodules released by erosion of the limestone...
Gerard Fowke 「Archeological Investigations」
...In either case, erosion has carried away its walls and filled upthe channel leading from it, and thus obliterated its site...
Gerard Fowke 「Archeological Investigations」
...The cave has three different entrances, 100 feet ormore apart, and each entrance is broken into three or four by columnsor masses of stone that have resisted erosion...
Gerard Fowke 「Archeological Investigations」
...Clearly, these threeformations were of an age that witnessed the erosion of the cave...
Gerard Fowke 「Archeological Investigations」
...Some stones, carried from neighboring ravines, have been exposed bythe wear due to erosion from natural causes and from cultivation...
Gerard Fowke 「Archeological Investigations」
...A short distance from these sites, across a ravine, is a bare, narrowridge, very steep on each side, so that erosion would readily act...
Gerard Fowke 「Archeological Investigations」
...The hills and valleys were asthey now exist; the erosion has been very slight as compared with whathas taken place since the loess was brought above the water, to whichit owes its origin...
Gerard Fowke 「Archeological Investigations」
...From the north wall afacing of large stones extending down the surface of the dune for avertical distance of 15 feet has prevented erosion by the winds...
Gerard Fowke 「Archeological Investigations」
...The great natural archway which covers thewhole pueblo protects it from wind and rain, and as a consequence,save on the front face, there are few signs of natural erosion...
Jesse Walter Fewkes 「Archeological Expedition to Arizona in 1895」
...This is a neat, finely-decussated, concolorous species, with the upperwhorls nodulous from erosion, as in Vivipara praerosa, Gerst...
John McDouall Stuart 「Explorations in Australia, The Journals of John McDouall Stuart」
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