Significance of palynology in Late Quaternary sediments in Peninsular Malaysia

Hassan, Kamaludin

doi:10.7186/bgsm24198905

Cited by 9 publications

(4 citation statements)

References 4 publications

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“…We assumed that samples with over 40% mangrove pollen represent mangrove swamps (e.g. Hassan, 1989; Horton et al, 2005). Consistently high amounts of mangrove pollen are present across all five samples between −19.3 and −18.8 m MSL.…”

Section: Resultsmentioning

confidence: 99%

“…The dominant species observed in Unit I are mangrove taxa such as Bruguiera (32% ± 10%) and Rhizophora (32% ± 5%). Greater abundance of Rhizophora pollen found at the lower part of Unit I (19.3–19.0 m MSL), coupled with higher diversity, suggests a deltaic or estuarine environment (Hassan, 1989). The presence of some freshwater taxa, such as Macaranga and Shorea and grasses suggest that there were other types of environments, such as freshwater wetlands and grasslands, located nearby; however, the low abundance of any of these taxa indicates that these environments were not present at the sampling location (Hassan, 1989).…”

Section: Resultsmentioning

confidence: 99%

“…The pollen assemblage indicates the presence of mangroves (e.g. Hassan, 1989; Horton et al, 2005), thus the SLIP formed between HAT and MTL (1.1 ± 1.1 m MSL). We corrected the elevation of −19.3 m MSL for 0.1 m of compaction.…”

Section: Resultsmentioning

confidence: 99%

“…We then assessed the taxa present to identify the paleoenvironment (i.e. Hassan, 1989; Horton et al, 2005).…”

Section: Methodsmentioning

confidence: 99%

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A new Holocene sea-level record for Singapore

Chua

Switzer

et al. 2021

The Holocene

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Relative sea-level (RSL) records from far-field regions distal from ice sheets remain poorly understood, particularly in the early Holocene. Here, we extended the Holocene RSL data from Singapore by producing early Holocene sea-level index points (SLIPs) and limiting dates from a new ~40 m sediment core. We merged new and published RSL data to construct a standardized Singapore RSL database consisting of 88 SLIPs and limiting data. In the early Holocene, RSL rose rapidly from −21.0 to −0.7 m from ~9500 to 7000 cal. yrs. BP. Thereafter, the rate of RSL rise decelerated, reaching a mid-Holocene highstand of 4.0 ± 4.5 m at 5100 cal. yrs. BP, before falling to its present level. There is no evidence of any inflections in RSL when the full uncertainty of SLIPs is considered. When combined with other standardized data from the Malay-Thai Peninsula, our results also show substantial misfits between regional RSL reconstructions and glacial isostatic adjustment (GIA) model predictions in the rate of early Holocene RSL rise, the timing of the mid-Holocene highstand and the nature of late-Holocene RSL fall towards the present. It is presently unknown whether these misfits are caused by regional processes, such as subsidence of the continental shelf, or inaccurate parameters used in the GIA model.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

“…We then assessed the taxa present to identify the paleoenvironment (i.e. Hassan, 1989; Horton et al, 2005).…”

Section: Methodsmentioning

confidence: 99%

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A new Holocene sea-level record for Singapore

Chua

Switzer

et al. 2021

The Holocene

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Evidence for ca. 7‐ka maximum Holocene transgression on the Peninsular Malaysia east coast

Parham

Saito

Sapon

et al. 2014

J Quaternary Science

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In situ fossil coral and shelly marine deposits occur up to 50 cm above mean sea level in north-east Peninsular Malaysia. The fossil reef comprises over 15 coral species and associated molluscs. Radiocarbon ages of corals range from 7238 to 6909 cal a BP. The reef occurs adjacent to bedrock hills that formed a mainland peninsula when the coral was living. Abundant well-preserved fossil molluscs with bivalves commonly articulated occur in ditch tailings from coastal plains flanking these hills. Landward, a sand ridge represents part of the maximum transgression shoreline. When alive, the fossil coral reef required clear water and full marine conditions seaward of the peninsula. The maximum transgression here occurred ca. 7 ka with stable environmental conditions persisting long enough for diverse coral reef development. Assuming a similar tidal range to today, relative sea level ca. 7 ka would have been between 1.4 and 3 m above present. Between then and ca. 6 ka, abundant sediment supply resulted in barrier-beach construction seaward of the coral reef, converting the area to a lagoonal environment unsuitable for coral and burial by muddy deposits. Assuming that regional relative sea-level data indicate maximum Holocene highstand up to þ5 m between 6 and 4 ka are correct, then the maximum transgression preceded maximum sea level by at least 1000 years.

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Late quaternary evolution of coastal and lowland riverine plains of Southeast Asia and northern Australia: an overview

Woodroffe

1993

Sedimentary Geology

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Significance of palynology in Late Quaternary sediments in Peninsular Malaysia

Cited by 9 publications

References 4 publications

A new Holocene sea-level record for Singapore

A new Holocene sea-level record for Singapore

Evidence for ca. 7‐ka maximum Holocene transgression on the Peninsular Malaysia east coast

Late quaternary evolution of coastal and lowland riverine plains of Southeast Asia and northern Australia: an overview

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