Low-sea-level emplacement of a very large Late Pleistocene 'megaturbidite' in the western Mediterranean Sea

Article Abstract:

Accelerator-mass-spectrometry radiocarbon dating has been used in five widely spaced cores to identify the date of emplacement of a large-volume turbidite bed in the Balearic Basin of the western Mediterranean. It was possible to produce an estimate of 22,000 calendar years before present for emplacement of the bed, when sea level was at its lowest level during the Last Glacial Maximum. The very large size of the Balearic Abyssal Plain bed indicates that it is an unusual event in the recent history of this margin.

Mediterranean Sea, Natural history

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Calculating erosion by deep-sea turbidity currents during initiation and flow

Article Abstract:

A study comparing the abundance ratios of microfossil (coccolith) species in turbidities with those in the ocean margin revealed that the turbidities of the Madiera Abyssal Plain contained a mixture of sediments ranging to approximately to 200,000 years, similar to the failure of a block of sediment which was 15 m in depth. Results of the radiocarbondating and coccolith ratios indicate that the turbidity current contained only 12% of near recent sediment, revealing that there was no erosion of soil on the way.

Analysis, Usage, Fossils, Radiocarbon dating, Marine biology

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Onset of submarine debris flow deposition far from original giant landslide

Article Abstract:

The evidence for origin of highly erosive submarine landslides that could generate large scale debris flow deposits and its impact on marine biology are presented.

Science & research, Waste Management and Remediation Services, Ocean & Coastal Water Pollution, Causes of, Observations, Landslides, Marine pollution, Marine ecosystems

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