. Shore processes and shoreline development . ntire period of equilibrium, sand-,pebbles, and shingle are driven back and forth, up and down thebeach slope, continually grinding themselves finer and this gigantic mill which borders the lands, rock fragmentsare continually reduced to a state of such exceedingly fine com-minution that they are readily removed from the shoreand shore-face zones as suspended particles in the water. During andafter heavy wave action the water is turbid with matter insuspension to a considerable distance from the land. Part ofthis suspended matter is remove
. Shore processes and shoreline development . ntire period of equilibrium, sand-,pebbles, and shingle are driven back and forth, up and down thebeach slope, continually grinding themselves finer and this gigantic mill which borders the lands, rock fragmentsare continually reduced to a state of such exceedingly fine com-minution that they are readily removed from the shoreand shore-face zones as suspended particles in the water. During andafter heavy wave action the water is turbid with matter insuspension to a considerable distance from the land. Part ofthis suspended matter is removed far from shore by the manycurrents which are involved in oceanic circulation, and finds apermanent resting place beneath the quiet waters of abysmaldepths. If there is an absolute loss of land where the resultant of waveaction is landward, and the shore profile is built forward untilequilibrium is established, how much greater must be that losswhen the seaward components of wave agitation prevail and 236 DEVELOPMENT OF THE SHORE PROFILE XX. VALIDITY OF THE THEORY OF A MARINE CYCLE 237 coarser debris on the bottom, as well as material in suspension,is transported seaward to be deposited over the edge of thecontinental shelf. Account must also be taken of the fact thatagitation of the marine veneer is continually grinding its par-ticles smaller and grinding material from the solid surface ofthe abrasion platform, thus producing fine sediment which cur-rents may readily carry to deeper water during and after vigorouswave action. The never-ending shifting of the beach depositback and forth over the shore and shoreface, already fully de-scribed, is accompanied by a ceaseless loss of the finest attritionproducts. Whether the shore profile is in equilibrium or not,whether waves are depositing beach material or sapping cliffbases, whether the marine veneer is increasing or decreasing involume, there is a constant loss of very fine matter which isborne far away to deep water by curren
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