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Only where clays are aggregated into particles of sand size, as on the Gulf Coast
of Texas, will they be formed into dunes. Silt is more easily picked up by the wind
but is carried away faster than sand, and there are few signs of dunelike bed ...
If, from meteorological measurements the regional rate of sand flow can be
calculated, and if it is assumed that the dune has a simple cross section that
migrates forward without change of form, a formula for the rate of movement of a
dune that ...
Dunes on coasts and in semi- arid areas have distinctive forms of two kinds:
those built up around vegetation and those formed when the plant cover is
destroyed. Winds blowing off a beach carry sand inland where the stems and
fronds of ...
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The New Encyclopaedia Britannica (Encyclopaedia)User Review - Not Available - Book Verdict
For virtually all its 238 years,Britannica has ruled the shelves as a peerless general encyclopedia. Reviewers have consistently given it high marks for most of the 12 criteria identified inKister's ... Read full review