...Ludlow Cave, in the caprock on the southeastern edge of the North CaveHills, was formed by water erosion, resulting in numerous pockets andcrevises in the ceiling and walls... 
Kenneth W. Andersen 「Mammals of Northwestern South Dakota」
...In thenext few years heavy erosion occurred in the upland fields, and thesoil carried downstream was deposited in the pond...
Henry S. Fitch 「The Forest Habitat of the University of Kansas Natural History Reservation」
...Less spectacular, but nevertheless important, problems confrontingconservationists include streambank erosion, channel deterioration,silting, recreational demands for water, and irrigation needs...
Artie L. Metcalf 「Fishes of Chautauqua, Cowley and Elk Counties, Kansas」
...Then and not till then surface erosion becomes animportant factor and the profile of
the mass becomes finally rounded...
Cosmos Mindeleff 「Casa Grande Ruin」
...A "rock shelter," or "shelter cave," is a room or recess formed byatmospheric erosion in the face, usually at the base, of a cliff...
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 itself, however, moreresembles an artificial tunnel than a natural result of erosion...
Gerard Fowke 「Archeological Investigations」
...Owing to the steep slopeat every point, except toward the summit of the ridge, there must besome erosion, and consequently the age of the burials can not begreat...
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 hand of man and the erosion of the elements have dealt harshlywith this portion of Honanki, for not a fragment of timber now remainsin its walls...
Jesse Walter Fewkes 「Archeological Expedition to Arizona in 1895」
...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」
ランダム例文：
confirm habitable bitters
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