Holocene relative sea-level changes inferred from multiple proxies on the west coast of South Korea

Song, Bing; Yi, Sangheon; Yu, Shi‐Yong; Nahm, Wook‐Hyun; Lee, Jin Young; Lim, Jaesoo; Kim, Jin-Cheul; Yang, Zhongyong; Han, Min; Jo, Kyoung Nam; Saito, Yoshiki

doi:10.1016/j.palaeo.2018.01.044

Cited by 43 publications

(17 citation statements)

References 61 publications

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“…yr BP: One group of the sea-level curves depicts that the sea level always was lower than the present MSL and continued a gradual rising toward the present MSL (e.g., Bloom and Park, 1985;Chough et al, 2004;Lee and Chang, 2015), whereas another group suggests a sea-level highstand (higher sea-level relative to the present MSL) during ∼4,000-7,000 cal. yr BP followed by a sealevel drop toward the present MSL (e.g., Hwang et al, 1997;Song et al, 2018). Unfortunately, the sedimentary characteristics and our age-depth model of the YAR-4 core (Figures 2, 12) independently do not allow to fully support one of the two different groups of suggested sea-level curves.…”

Section: Searching For Magnetic Property Features Associated With Paleoenvironmental Changesmentioning

confidence: 84%

“…yr BP. Besides this, the sea-level curve of Song et al (2018) depicts an additional drastic drop in the sea-level rise rate at ∼8,200 cal. yr BP, then shortly followed by an increase of this rate again, inferring formation of a concomitant short-term slowstand/stillstand (Figure 12).…”

Section: Searching For Magnetic Property Features Associated With Paleoenvironmental Changesmentioning

confidence: 89%

“…yr BP (Supplementary Figures S2,S3 and S4). In order to search for magnetic property proxies for paleoenvironmental changes, we compare temporal variations between some of the obtained magnetic properties (we choose k LFQ , B c , B cr , M rs /M s , and each of IRM-unmix components for this) and proxy indicating the change in sea-level (Lee and Chang, 2015;Song et al, 2018), the ENSO activity (Moy et al, 2002), the summer EAM (Dykoski et al, 2005), and the HCO with the 8.2 ka cooling event (Park et al, 2019) around the Korean Peninsula, respectively (Figure 12,Supplementary Figures S2,S3 and S4).…”

Section: Searching For Magnetic Property Features Associated With Paleoenvironmental Changesmentioning

confidence: 99%

“…FIGURE 12 | Comparison of our age-depth model for the YAR-4 core with two different suggested sea-level curves for the western coast of South Korea (Lee and Chang, 2015;Song et al, 2018). The oxygen isotope ratio variability from the Dongge Cave in the South China by Dykoski et al (2005), adopted worldwide as representative of the summer EAM variability, seems to have similarity partly in centennial (short-term excursion; blue shaded regions shown in Supplementary Figure S3) and millennial (long-term trend; intervals between blue shaded individuals in Supplementary Figure S3) scales to our B c , B cr , and M rs /M s variabilities (Supplementary Figure S3).…”

Section: Searching For Magnetic Property Features Associated With Paleoenvironmental Changesmentioning

confidence: 99%

“…Possible Magnetic Response to Abrupt Drop in the Rate of Sea-Level Rise Many sea-level change curves have been suggested for the western coast of South Korea during the Holocene (e.g., Bloom and Park, 1985;Hwang et al, 1997;Chough et al, 2004;Lee et al, 2008;Lee and Chang, 2015;Song et al, 2018); however, no consensus has been reached (cf. the review by Choi, 2018).…”

Section: Searching For Magnetic Property Features Associated With Paleoenvironmental Changesmentioning

confidence: 99%

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Magnetic Properties of a Holocene Sediment Core from the Yeongsan Estuary, Southwest Korea: Implications for Diagenetic Effects and Availability as Paleoenvironmental Proxies

Ahn¹,

Lim

Kim

2021

Front. Earth Sci.

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The sensitivity of magnetic properties, which characterize the mineralogy, concentration, and grain size distribution of magnetic minerals, to environmental processes may provide useful information on paleoenvironmental changes in estuarine environments. Magnetic property studies of estuaries are less common than other environments and, due to the west coast of South Korea having an abundance of estuaries, it provides a good place to study these processes. In this study, we analyzed a variety of magnetic properties based on magnetic susceptibility, hysteresis parameters, progressive acquisition of isothermal remanent magnetization and first-order reversal curve data from a Holocene muddy sediment core recovered from the Yeongsan Estuary on the west coast of South Korea. We examined diagenetic effects on magnetic properties and tested their availability as proxies of paleoenvironmental change. The presence of generally low magnetic susceptibility, ubiquitous greigite-like authigenic magnetic component, and very fine magnetic particle occurrence suggested that the analyzed sediments had undergone considerable early diagenetic alteration. Electron microscopic observations of magnetic minerals support this suggestion. Our results confirm that the use of initial bulk susceptibility as a stand-alone environmental change proxy is not recommended unless it is supported by additional magnetic analyses. We recognized the existence of ferromagnetic-based variabilities related to something besides the adverse diagenetic effects, and have examined possible relationships with sea-level and major climate changes during the Holocene. The most remarkable finding of this study is the two distinct intervals with high values in magnetic coercivity (Bc), coercivity of remanence (Bcr), and ratio of remanent saturation moment to saturation moment (Mrs/Ms) that were well coincident with the respective abrupt decelerations in the rate of sea-level rise occurred at around 8.2 and 7 thousand years ago. It is then inferred that such condition with abrupt drop in sea-level rise rate would be favorable for the abrupt modification of grain size distribution toward more single-domain-like content. We modestly propose consideration of the Bc, Bcr, and Mrs/Ms variability as a potential indicator for the initiation/occurrence of sea-level stillstand/slowstand or highstand during the Holocence, at least at estuarine environments in and around the studied area.

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Section: Searching For Magnetic Property Features Associated With Paleoenvironmental Changesmentioning

confidence: 84%

Section: Searching For Magnetic Property Features Associated With Paleoenvironmental Changesmentioning

confidence: 89%

Section: Searching For Magnetic Property Features Associated With Paleoenvironmental Changesmentioning

confidence: 99%

Section: Searching For Magnetic Property Features Associated With Paleoenvironmental Changesmentioning

confidence: 99%

Section: Searching For Magnetic Property Features Associated With Paleoenvironmental Changesmentioning

confidence: 99%

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Magnetic Properties of a Holocene Sediment Core from the Yeongsan Estuary, Southwest Korea: Implications for Diagenetic Effects and Availability as Paleoenvironmental Proxies

Ahn¹,

Lim

Kim

2021

Front. Earth Sci.

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Surface microtextures of quartz grains and minor sedimentary components across the Paleolithic Jeongok‐ri sediments, Yeoncheon, South Korea

Baek

2023

J Quaternary Science

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The Jeongok‐ri Paleolithic site in the central Korean peninsula is known as the first findspot of Acheulean‐type hand axes in East Asia. Although many previous studies have investigated the depositional environments of Jeongok‐ri sediments across the Paleolithic occupation, they remain controversial. In this study, we collected an 11‐m‐long core to obtain evidence from systematic surface microtextures of quartz grains (SMQs) concerning depositional environments in the Jeongok‐ri archeological site. SMQs in the Jeongok‐ri sediments are characterized by dominant angular to subangular outlines and small to large conchoidal fractures with arcuate steps, as well as sparse V‐shaped percussion cracks; these features suggest short distances and subaqueous transportation with grain‐to‐grain collisions and violent impacts of quartz grains. On the basis of simultaneous sedimentation of the hosting silt deposits, our SMQ results suggest that Jeongok‐ri sediments were originally fluvial, regardless of their intermediate sedimentary history. This evidence from quartz grain microtextures is consistent with minor sedimentary components found in the Jeongok‐ri core sediments, such as diatom grains as microfossil constituents, along with macroscopic charcoals and titanium‐bearing detrital magnetite grains. The geological and geomorphological conditions of the Jeongok‐ri site are also favorable for floodplain environments given the position adjacent to river terraces formed by the previous lateral erosion of a meandering channel in the nearby Hantan River. Our findings will help to understand environmental conditions during the development of Paleolithic cultures in East Asia.

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Paleoclimate and Holocene relative sea-level history of the east coast of India

Rao

Pandey²,

Kubo

et al. 2020

J Paleolimnol

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Holocene relative sea-level changes inferred from multiple proxies on the west coast of South Korea

Cited by 43 publications

References 61 publications

Magnetic Properties of a Holocene Sediment Core from the Yeongsan Estuary, Southwest Korea: Implications for Diagenetic Effects and Availability as Paleoenvironmental Proxies

Magnetic Properties of a Holocene Sediment Core from the Yeongsan Estuary, Southwest Korea: Implications for Diagenetic Effects and Availability as Paleoenvironmental Proxies

Surface microtextures of quartz grains and minor sedimentary components across the Paleolithic Jeongok‐ri sediments, Yeoncheon, South Korea

Paleoclimate and Holocene relative sea-level history of the east coast of India

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