Holocene sea levels and palaeoenvironments, Malay-Thai Peninsula, southeast Asia
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Material Information

Title:
Holocene sea levels and palaeoenvironments, Malay-Thai Peninsula, southeast Asia
Series Title:
The Holocene Volume 15, Number 8 Department of Earth and Environmental Science Departmental Papers
Creator:
Horton, Benjamin P.
Morley, R.J.
Gibbard, P.L.
Purintavaragul, C.
Milne, G.M.
Stargardt,J.M.
Publication Date:
Language:
English

Subjects

Subjects / Keywords:
Climate Change ( lcsh )
Sea Level Rise ( lcsh )
Southeast Asia ( lcsh )
Malay Peninsula ( lcsh )

Notes

Abstract:
We reveal through sedimentological and palynological investigations of Great Songkhla Lakes, east coast of the Malay-Thai Peninsula, Southeast Asia, sedimentary sequences consisting of very rich palynomorph assemblages dominated by pollen of mangroves and freshwater swamps, but compared with other regions in Southeast Asia are of relatively low diversity. Geochronological data indicate that the Great Songkhla Lakes record one of the earliest mangrove environments in Southeast Asia (8420 to 8190 cal yrs BP), which are subsequently replaced by a freshwater swamp at 7880 to 7680 cal yrs BP due to the decline of marine influence. Sea-level observations from Great Songkhla Lakes and other areas of the Malay-Thai Peninsula reveal an upward trend of Holocene relative sea level from a minimum of -22 m at 9700 - 9250 cal yrs BP to a mid-Holocene high stand of 4850 - 4450 cal yrs BP, which equates to a rise of c. 5.5 mmyr-1. The sea-level fall from the high stand is steady at c. -1.1 mmyr-1. Geophysical modelling shows that hydro-isostasy contributes a significant spatial variation to the sea-level signal between some site locations (3-4 m during the midHolocene), indicating that it is not correct to construct a single relative sea-level history for the Malay-Thai Peninsula. ( English )

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Florida International University
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