 The formation of irregular ripple-marks or dunes by a current is due to the vortex which exists on the lee of any superficial inequality of the bottom ; the direct current carries the sand up the weather slope and the vortex up the lee slope. Thus any...  Proceedings of the Royal Society of London - Page 32de Royal Society (Great Britain) - 1884Affichage du livre entier - À propos de ce livre
 | Sir Norman Lockyer - 1884 - 662 pages
...the observations may be summarised as :ollows : — The formation of irregular ripple-marks or dunes by a current is due to the vortex which exists on...inequalities are increased, and the surface of sand becomes mot led over with irregular dunes. The velocity of the water must be greater than one limit and less... | |
 | Sir Norman Lockyer - 1884 - 754 pages
...the observations may be summarised as follows : — The formation of irregular ripple-marks or dunes by a current is due to the vortex which exists on...carries the sand up the weather slope and the vortex np the lee slope. Thus any existing inequalities are increased, and the surface of sand becomes motiled... | |
 | Douglas Wilson Johnson - 1919 - 616 pages
...ripple marks or dunes (current ripples) by a current is due to the vortex which exists on the lee side of any superficial inequality of the bottom; the direct...sand becomes mottled over with irregular dunes." The intermittent friction to which de Candolle appealed is not essential in this explanation of current... | |
 | Douglas Wilson Johnson - 1919 - 632 pages
...growth. Darwin concluded that " the formation of irregular ripple marks or dunes (current ripples) by a current is due to the vortex which exists on the lee side of any superficial inequality of the bottom; the direct current carries the sand up the weather... | |
 | Sir Norman Lockyer - 1884 - 1196 pages
...the observations may be summarised as follows : — The formation of irregular ripple-marks or dunes by a current is due to the vortex which exists on...inequalities are increased, and the surface of sand becomes mot led over with irregular dunes. The velocity of the water must be greater than one limit and less... | |
 | Thomas Chrowder Chamberlin - 1916 - 888 pages
...ripple growth. Darwin concluded that "the formation of irregular ripple marks or dunes [current ripples] by a current is due to the vortex which exists on the lee side of any superficial inequality of the bottom; the direct current carries the sand up the weather... | |
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