Late Holocene environmental changes of coastal lagoon inferred from a fossil diatom analysis of sediment core from Lake Hamana, central Japan

Sato, Yoshiki; Matsuoka, Hiromi; Okamura, Makoto; Kashima, Kaoru

doi:10.1016/j.quaint.2015.06.006

Cited by 17 publications

(9 citation statements)

References 34 publications

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“…yr BP. Sato et al (2016) additionally infer an increase in lake salinity coincident with the AD 1498 earthquake, a trend also noted in previous investigations Kashima et al, 1997;Morita et al, 1998), though yet to be precisely dated. Nishinaka et al (1996) identify two organic layers, each overlain by sand, in the channel that presently links the lake to the sea.…”

Section: The Eastern Tōnankai (D) Segmentsupporting

confidence: 80%

“…yr BP respectively. Examining a 3.5 m long core from the main basin of Lake Hamana, Sato et al (2016) identify an older potential marine inundation, interpreting a spike in the abundance of a diatom species indicative of sand-rich tidal flats as evidence for a tsunami or storm surge redistributing sediment within the lake. Radiocarbon dating of bulk sediment suggests this occurred after 4790 -4420 cal.…”

Section: The Eastern Tōnankai (D) Segmentmentioning

confidence: 99%

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A systematic review of geological evidence for Holocene earthquakes and tsunamis along the Nankai-Suruga Trough, Japan

Garrett

Fujiwara

Garrett

et al. 2016

Earth-Science Reviews

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Use policyThe full-text may be used and/or reproduced, and given to third parties in any format or medium, without prior permission or charge, for personal research or study, educational, or not-for-prot purposes provided that:• a full bibliographic reference is made to the original source • a link is made to the metadata record in DRO • the full-text is not changed in any way The full-text must not be sold in any format or medium without the formal permission of the copyright holders.Please consult the full DRO policy for further details. ABSTRACTThe Nankai-Suruga Trough, the subduction zone that lies immediately south of Japan's densely populated southern coastline, generates devastating great earthquakes (magnitude > 8) characterised by intense shaking, crustal deformation and tsunami generation. Forecasting the hazards associated with future earthquakes along this >700 km long fault requires a comprehensive understanding of past fault behaviour. While the region benefits from a long and detailed historical record, palaeoseismology has the potential to provide a longer-term perspective and additional crucial insights. In this paper, we summarise the current state of knowledge regarding geological evidence for past earthquakes and tsunamis along the Nankai-Suruga Trough. Incorporating literature originally published in both Japanese and English and enhancing available results with new age modelling approaches, we summarise and critically evaluate evidence from a wide variety of sources. Palaeoseismic evidence includes uplifted marine terraces and biota, marine and lacustrine turbidites, liquefaction features, subsided marshes and tsunami deposits in coastal lakes and lowlands. While 75 publications describe proposed evidence from more than 70 sites, only a limited number provide compelling, well-dated evidence. The best available records enable us to map the most likely rupture zones of twelve earthquakes that occurred during the historical period. This spatiotemporal compilation suggests that the AD 1707 earthquake ruptured almost the full length of the subduction zone and that earthquakes in AD 1361 and 684 may have been predecessors of similar magnitude. Intervening earthquakes were of lesser magnitude, highlighting the variability in rupture mode that characterises the Nankai-Suruga Trough. Intervals between ruptures of the same seismic segment range from less than 100 to more than 450 years during the historical period. Over longer timescales, palaeoseismic evidence suggests intervals between earthquakes ranging from 100 to 700 years, however these figures reflect a range of thresholds controlling the creation and preservation of evidence at any given site as well as the genuine intervals between earthquakes. At present, there is no geological data that suggest the occurrence of a larger magnitude earthquake than that experienced in AD 1707, however few studies have sought to establish the relative magnitudes of different earthquake and tsunami events along the Nankai-Suruga Trough. Alongside the lack of...

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Section: The Eastern Tōnankai (D) Segmentsupporting

confidence: 80%

Section: The Eastern Tōnankai (D) Segmentmentioning

confidence: 99%

A systematic review of geological evidence for Holocene earthquakes and tsunamis along the Nankai-Suruga Trough, Japan

Garrett

Fujiwara

Garrett

et al. 2016

Earth-Science Reviews

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show abstract

“…The four youngest deposits are linked with tsunami inundation in 1854 or 1707, 1498 CE, the 13th century and 1096 CE by Tsuji et al (1998); however, more recent recalibration of radiocarbon data highlights difficulties with ascribing particular historical tsunamis to these deposits (Garrett et al, 2016). Sato et al (2016b) identified a marine incursion event around 4790 -4420 cal. BP based on fossil diatom analyses of a sediment core obtained from the central Lake Hamana.…”

Section: Prehistoric Tsunami Depositsmentioning

confidence: 99%

Paleotsunami research along the Nankai Trough and Ryukyu Trench subduction zones – Current achievements and future challenges

Fujiwara

Goto

Ando

et al. 2020

Earth-Science Reviews

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“…Sheltered back‐barrier lagoons with high sedimentation rates often offer continuous, high‐resolution records of environmental changes induced by variations in relative sea level (RSL) and resultant changes to a coastal morphology (e.g., Carter et al, 1989; Cho et al, 2019; Howell et al, 1988; Kirk & Lauder, 2000; Li et al, 2001; Sato et al, 2016; Song et al, 2019; Yum et al, 2004). Paleo‐tsunami and paleo‐typhoon deposits are also often well preserved in late‐Quaternary coastal lagoon sediments in Japan, as evidenced by their unique grain sizes, elemental abundances, and microfossil assemblage relative to the lagoon material they are embedded in (e.g., Baranes et al, 2016; Katsuki et al, 2016; Katsuki, Yang, et al, 2017; Ladlow et al, 2019; Sawai et al, 2008; Woodruff et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

Fossil diatom assemblage changes due to paleoenvironment change, tsunami, and typhoon in southern Japan

et al. 2023

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Tracking paleoenvironmental change and past event deposits is very important to evaluate the natural hazard spatially. This paper presents how the environment changes and implies the event deposit depending on the diatom assemblage change. To investigate paleoenvironmental change and identify the difference between tsunami and typhoon deposits, we analyze diatoms from the sediments in two coastal lakes in southern Japan where flood deposits have been linked to historical typhoon and tsunami events (Lakes Kawahara and Ryuo). The sediment cores extend from B.C.E. 500 to approximately C.E. 1000 and the downcore variation in diatom assemblages indicates a series of transitions from saline to fresher conditions in both Lake Kawahara and Lake Ryuo between approximately C.E. 500 and 1700. We observe an obvious deviation in diatom assemblages in event deposits previously identified to be either of tsunami or typhoon in origin. For the most prominent event deposit preserved in Lake Ryuo by the Hoei tsunami of C.E. 1707, the deposition of marine diatoms serves as evidence of marine flooding, while the subsequent deposition of soil and freshwater diatoms indicates the mobilization of terrigenous sediment during returning seaward flows. In contrast, the most prominent event deposit in Lake Kawahara is associated with freshwater flooding by the Kamikaze typhoon of C.E. 1281 and contains very low diatom abundances and a peak of freshwater taxa, followed by a peak in diatom counts potentially due to greater biological activity induced by a resultant influx of nutrients and re‐oxygenation during the event.

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Late Holocene environmental changes of coastal lagoon inferred from a fossil diatom analysis of sediment core from Lake Hamana, central Japan

Cited by 17 publications

References 34 publications

A systematic review of geological evidence for Holocene earthquakes and tsunamis along the Nankai-Suruga Trough, Japan

A systematic review of geological evidence for Holocene earthquakes and tsunamis along the Nankai-Suruga Trough, Japan

Paleotsunami research along the Nankai Trough and Ryukyu Trench subduction zones – Current achievements and future challenges

Fossil diatom assemblage changes due to paleoenvironment change, tsunami, and typhoon in southern Japan

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