alexa Estimating sediment accumulation rates in Manila Bay, a marine pollution hot spot in the Seas of East Asia.
Geology & Earth Science

Geology & Earth Science

Journal of Geology & Geophysics

Author(s): Sta Maria EJ, Siringan FP, Bulos Ad, Sombrito EZ, Sta Maria EJ, Siringan FP, Bulos Ad, Sombrito EZ

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Abstract The GEF/UNDP/IMO/PEMSEA project identifies Manila Bay as among the marine pollution hot spots in the Seas of East Asia. (210)Pb dating of its sediment can provide a historical perspective of its pollution loading. However, the validity of (210)Pb dating in a complex dynamic coastal system of Manila Bay may come into question. Land-based sediment input can be high and physical and biological processes can possibly disturb the sediment layers. In this report, the (210)Pb profiles of sediment cores from different parts of the bay are presented. The linear sedimentation rates are shown to be higher in the recent past and are also variable across the bay. The largest change in sedimentation rate, coincided with the occurrence of a volcanic eruption in 1991 and is shown by applying a variant of the CIC model in sedimentation rate calculations. The data suggest that (210)Pb dating can be useful in estimating relative magnitudes of sedimentation rates, even in a complex dynamic coastal system like Manila Bay. This article was published in Mar Pollut Bull and referenced in Journal of Geology & Geophysics

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