Rapid flooding of the southern Vietnam shelf during the early to mid‐Holocene

Tjallingii, Rik; Stattegger, Karl; Stocchi, Paolo; Saito, Yoshiki; Wetzel, Andreas

doi:10.1002/jqs.2731

Cited by 50 publications

(26 citation statements)

References 42 publications

(115 reference statements)

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“…). When compared to the composite sea‐level curve for the South China Sea (Tjallingii et al ., , ; Fig. ), the LF 2 and LF 2/3 intervals formed during both times of ‘average’ sea‐level rise at a rate of ca 10 mm year −1 and times of rapidly rising sea‐level at Meltwater Pulse 1A and 1C (>40 mm year −1 from −100 to −80 m and >20 mm year −1 from −32 to −10 m, respectively).…”

Section: Results and Interpretationmentioning

confidence: 93%

“…Holocene sea‐level rise in the South China Sea (A) and relief of the Gulf of Tonkin (B) and rate of coastline migration (C). (A) Sea‐level curve based on data obtained from the Sunda Shelf (20 to 12 ka; Hanebuth et al ., ), offshore the present‐day Mekong Delta (12 to 7 ka; Tjallingii et al ., , ) and the shoreline of southern Vietnam (Stattegger et al ., ); chronometric age data from the present study are marked with dots (core 54), crosses (core 45) and open circles (core 27). (B) Bathymetric transect along the valley incised by the ancient Red River based on GEBCO (2015), shipboard data and data of Hori et al .…”

Section: Results and Interpretationmentioning

confidence: 99%

“…The maximum flooding surface (MFS) formed in the area of the modern Red River mouth at around 8·6 ka (Tanabe et al ., ). However, all cores were taken in water depths >24 m (a level that was reached shortly after 9·0 ka during the last phase of accelerated sea‐level rise; Tjallingii et al ., ; Fig. ).…”

Section: Development Of Valley Fill and Sequence Stratigraphymentioning

confidence: 93%

“…After the last glacial maximum (LGM), inundation of the exposed shelf areas started between 24 ka and 19·6 ka (Hanebuth et al ., ) and continued until the mid‐Holocene sea‐level maximum at ca 6 ka (Stattegger et al ., ) accentuated by two phases of accelerated sea‐level rise at 14·6 to 14·2 ka and 9·0 to 8·2 ka [Melt Water Pulse (MWP) 1A and 1C; Hanebuth et al ., ; Tjallingii et al ., ]. Sea‐level rise and the concomitant rise of local base level resulted in sediment aggradation in incised valleys and transformed them into estuaries (e.g.…”

Section: Study Area and Geological Settingmentioning

confidence: 99%

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Sedimentological and ichnological implications of rapid Holocene flooding of a gently sloping mud‐dominated incised valley – an example from the Red River (Gulf of Tonkin)

et al. 2017

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The Gulf of Tonkin coastline migrated at an average rate of ca 60 m year−1 landward during Holocene sea‐level rise (20 to 8 ka). Due to a combination of rapid coastline migration and undersupply of sand, neither coastal barriers nor tidal sand bars developed at the mouth of the Red River incised valley. Only a 30 to 80 cm thick sandy interval formed at the base of full‐marine deposits. Thus, the river mouth represented a mud‐dominated open funnel‐shaped estuary during transgression. At the base of the valley fill, a thin fluvial lag deposit marks a period of lowered sea‐level when the river did not reach geomorphic equilibrium and was thus prone to erosion. The onset of base‐level rise is documented by non‐bioturbated to sparsely bioturbated mud that occasionally contains pyrite indicating short‐term seawater incursions. Siderite in overlying deposits points to low‐salinity estuarine conditions. The open funnel‐shaped river mouth favoured upstream incursion of seawater that varied inversely to the seasonal strongly fluctuating discharge: several centimetres to a few tens of centimetres thick intervals showing marine or freshwater dominance alternate, as indicated by bioturbational and physical sedimentary structures, and by the presence of Fe sulphides or siderite, respectively. Recurrent short‐term seawater incursions stressed the burrowing fauna. The degree of bioturbation increases upward corresponding to increasing marine influence. The uppermost estuarine sediments are completely bioturbated. The estuarine deposits aggraded on average rapidly, up to several metres kyr−1. Siphonichnidal burrows produced by bivalves, however, document recurrent episodes of enhanced deposition (>0·5 m) and pronounced erosion (<1 m) that are otherwise not recorded. The slope of the incised valley affected the sedimentary facies. In steep valley segments, the marine transgressive surface (equivalent to the onset of full‐marine conditions) is accentuated by the Glossifungites ichnofacies, whereas in gently sloped valley segments the marine transgressive surface is gradational and bioturbated. Marine deposits are completely bioturbated.

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Section: Results and Interpretationmentioning

confidence: 93%

Section: Results and Interpretationmentioning

confidence: 99%

Section: Development Of Valley Fill and Sequence Stratigraphymentioning

confidence: 93%

Section: Study Area and Geological Settingmentioning

confidence: 99%

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Sedimentological and ichnological implications of rapid Holocene flooding of a gently sloping mud‐dominated incised valley – an example from the Red River (Gulf of Tonkin)

et al. 2017

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“…). Although the development of MxFSs and the initiation of deltas are considered to coincide with the rapid sea‐level rise from 9·0 to 8·2 ka (Hori & Saito, ; Rodriguez et al ., ; Törnqvist & Hijma, ; Tjallingii et al ., ), the different ages of the MxFS in the Tokyo Lowland suggest that steady, rather than avulsion‐intermittent, sediment discharge from a major river is essential to the synchronous development of MxFSs around the globe.…”

Section: Discussionmentioning

confidence: 99%

Millennial‐scale stratigraphy of a tide‐dominated incised valley during the last 14 kyr: Spatial and quantitative reconstruction in the Tokyo Lowland, central Japan

et al. 2015

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Spatial and quantitative analysis of infilling processes of the tide-dominated incised valleys beneath the Tokyo Lowland during the last 14 kyr was undertaken by using data from 18 sediment cores, 467 radiocarbon dates and 6100 borehole logs. The post-Last Glacial Maximum valley fills consist of braided river, meandering river, estuary, spit and delta systems in ascending order. The boundary between the estuary and delta systems is regarded as the maximum flooding surface. The maximum flooding surface beneath the Tokyo Lowland is dated at 8 ka in the Arakawa Valley and 7 ka in the Nakagawa Valley. This age difference is due to the migration of the Tone River from the Arakawa Valley to the Nakagawa Valley at 5 ka, and suggests that the widely held view that the global initiation of deltas coincided with the abrupt rise of sea-level at 9 to 8 ka is true only where there has been steady sediment supply from major rivers. The meandering river system is dominated by sheet-like sands that were deposited during lateral migration of channels during the Younger Dryas and isolated vertical sands within muds that reflect vertical aggradation of channels before and after the Younger Dryas. The transition between these channel geometries is controlled by a threshold sea-level rise of 4 to 7 mm yr À1 . Before migration of the Tone River at 5 ka, the tide-dominated bay in the Nakagawa Valley was filled by upward-fining laterally accreting muds. The muds accreted from the margin to the axis of the bay. Such lateral accretion of suspended particles derived from outside the bay has been documented in other tide-dominated coastal environments and is probably common in other similar settings. After the migration of the Tone River, the bay was filled by upward-coarsening deltaic sediments.

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Classification, Architecture, and Evolution of Large River Deltas

Hori

Saito

2022

Large Rivers

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Rapid flooding of the southern Vietnam shelf during the early to mid‐Holocene

Cited by 50 publications

References 42 publications

Sedimentological and ichnological implications of rapid Holocene flooding of a gently sloping mud‐dominated incised valley – an example from the Red River (Gulf of Tonkin)

Sedimentological and ichnological implications of rapid Holocene flooding of a gently sloping mud‐dominated incised valley – an example from the Red River (Gulf of Tonkin)

Millennial‐scale stratigraphy of a tide‐dominated incised valley during the last 14 kyr: Spatial and quantitative reconstruction in the Tokyo Lowland, central Japan

Classification, Architecture, and Evolution of Large River Deltas

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