The physical geography of New York state . ng limestone coasts,solution is a factor; and in many rocks the disintegrationof the minerals is hastened by the salt of the spray andby other impurities from the sea water. Aside from the action of solution, the waves are oftenable to wrest off fragments by their direct blow, as theresult of the compression of air in cavities and the tremen-dous hydraulic pressure produced by the wave blows. Bymeans of the materials obtained by this action, togetherwith the supply furnished from the land by weathering, bywind and by rivers, the waves are supplied wit
The physical geography of New York state . ng limestone coasts,solution is a factor; and in many rocks the disintegrationof the minerals is hastened by the salt of the spray andby other impurities from the sea water. Aside from the action of solution, the waves are oftenable to wrest off fragments by their direct blow, as theresult of the compression of air in cavities and the tremen-dous hydraulic pressure produced by the wave blows. Bymeans of the materials obtained by this action, togetherwith the supply furnished from the land by weathering, bywind and by rivers, the waves are supplied with effectivetools, with which they can batter the rocks of the coastand wear them back. It is mainly by this mechanical work,rather than by solution, that the coasts are worn back intothe land; and among the factors involved, the most ini- Tin I. in> s 309 portant is the mechanical action of tin- waves armed withrock fragments. The battering ram of wave action is concentrate,! alonga moderately narrow ]»lanc, its width varying with the.
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Keywords: ., bookcentury1900, bookdecade1900, bookpublisherlondo, bookyear1902
