. The Earth beneath the sea : History . Fig. 1. Polished core section from Santa Barbara Basin showing laminae. The thicker white layers are believed to have been deposited by turbidity currents. Core No. AHF 5986; depth 181-191 cm below sediment-water interface. layers arise by mass movement or turbidity currents according to the above authors. When they occur locally, they are probably the result of slumping from the basin wall. Stratification was not observed in the Moluccan basins by Kuenen (1943) (although he did record it in Kaoe Bay). He explained this on the basis of a continual additi
. The Earth beneath the sea : History . Fig. 1. Polished core section from Santa Barbara Basin showing laminae. The thicker white layers are believed to have been deposited by turbidity currents. Core No. AHF 5986; depth 181-191 cm below sediment-water interface. layers arise by mass movement or turbidity currents according to the above authors. When they occur locally, they are probably the result of slumping from the basin wall. Stratification was not observed in the Moluccan basins by Kuenen (1943) (although he did record it in Kaoe Bay). He explained this on the basis of a continual addition of coarser-grained material to the more slowly settling fine- grained detritus. He further considered that turbulence on the bottom was sufficient to stir up the finer material and always keep some of it in suspension. Another very important factor in preventing or disturbing stratification is the activity of benthonic animals (Emery, 1953, 1960). The burrowing activities of worms, brittle stars, holothurians and crinoids, amongst others, are very significant. Some species can function where only traces of oxygen exist, but, since animals are usually absent on stagnant bottoms, these locations are the most likely for the preservation of laminations.
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Keywords: ., bookcentury1900, bookcollectionbiodivers, booksubjectoceanbottom
