Abstract
Publisher Summary This chapter discusses the noncohesive mobile sediments of Swansea Bay that originated almost wholly by derivation from submarine relict deposits, their erosion from sea bed, and their transportation along it to the littoral by the hydrodynamic mechanisms that occur, singly and in combination. The tidal range of Swansea Bay is among the largest experienced in north–west Europe that predicted for lowest to highest astronomical tides being 10.5 m; the mean springs tide range is 8.6 m, and the mean Neaps range is 4.1 m. The Bay is shallow and, consequently, the currents might be predicted to be strong. The sedimentary deposits that form the sea bed of Swansea Bay and its approaches are muds, silts, sands, gravels, and cobbles, which may be regarded as being relict or palimpsest or both. The semidiurnal tidal currents of the Bay derive from the rectilinear systems of the Bristol Channel as a whole, but are much altered, in path, duration and speed by the configuration of the embayment. The Bristol Channel has the second highest tidal range in the world.
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