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FORMATION PROCESS OF COASTAL ECOREGIONS IN RELATION TO QUATERNARY GEOLOGICAL ACTIVITIES IN BINH THUAN PROVINCE

Duong Thi Thanh Xuyen, Nguyen Van Tuan, Tran Nghi, Nguyen Dinh Thai, Nguyen Thi Tuyen

Abstract


Endogenous and exogenous geological processes have divided the coastal zone of Binh Thuan province into four typical ecological zones: Late-Holocene plain ecoregion with river-marine origin which is distributed between coastal sand dunes and the foot/base of the Truong Son mountains, coastal sand dune ecoregion 0 - 150 m high, tidal ecoregion 0 - 5 m deep, bottom-sediment ecoregion 5 - 25 m deep and the ancient shoreline ecoregion 25 - 30 m deep. The plain ecoregion and the subterranean bays were formed mainly due to the subsidence motion and the sedimentation in relation to the sea level change in the Holocene. The sand dune ecoregion was the result of the evolution process of five sand formation cycles in relation to five cycles of sea level change in the Quaternary due to the effects of five glacial cycles and interglacier Gunz/GM, Mindel/MR, Riss/R-W1, Wurm/W1-W2 and Wurm2/Flandrian transgression.

Keywords


Coastal ecoregion, Binh Thuan province, Quaternary geological activity.

References


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Journal of Marine Science and Technology ISSN: 1859 3097

Published by Vietnam Academy of Science and Technology