Geomorphological Developments Gp the Western Shimôsa Upland in Chiba Prefecture, Japan

Sugihara, Shigeo

doi:10.4157/grj.43.703

Cited by 14 publications

(7 citation statements)

References 1 publication

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“…Sea-level proxies in the upper part of Ibaraki prefecture (north of Hitachinaka) have elevations between 52.75 ± 11.55-74 ± 14.80 m, decreasing towards the south, and are chronostratigraphically constrained mainly by the Miwa-L pumice layer, in addition to the K-Tz and Hk-KIP-7 layers (Suzuki, 1989). In the Joban region to the south, sea-level proxies are observed with elevations between 23.23 ± 9.46-50 ± 10 m, and increasing drastically south on the Boso Peninsula (maximum elevation of 130 ± 10 m; Sugihara, 1970;Koike and Machida, 2001;Kaizuka, 1987).…”

Section: Kantomentioning

confidence: 99%

“…The tilting towards the northeast is thought to be at least partially due to uplift related to Sagami trench subduction to the southwest of the Boso Peninsula (Tamura et al, 2010). Proxies are mainly constrained by the presence of Miwa-L and Hk-KIP-8 layers, in addition to Hk-Tp, On-Pm1, and the Shimsueyoshi loam (Suzuki, 1989;Suzuki, 1992). 14 C dating was utilized on identified molluscs (Crassotrea gigas) to constrain a MIS 1 stage terrace and correlate other highstand-related terraces accordingly at Yokaichiba (Koike and Machida, 2001).…”

Section: Kantomentioning

confidence: 99%

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A review of MIS 5e sea-level proxies around Japan

Tam

Yokoyama

2021

Earth Syst. Sci. Data

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Abstract. Sea-level proxies for Marine Isotopic Stage 5e (MIS 5e, ca. 124 ka) are abundant along the Japanese shoreline and have been documented for over at least the past 60 years. The bulk of these sea-level proxies are identified in Japan as marine terraces, often correlated by stratigraphic relationships to identified tephra layers, or other chronologically interpreted strata. Use of stratigraphic correlation in conjunction with other techniques such as paleontological analysis, tectonic uplift rates, tephra (volcanic ash), uranium–thorium (U–Th), and carbon-14 (14C) dating have connected Japan's landforms to global patterns of sea-level change. This paper reviews over 60 years of publications containing sea-level proxies correlated with MIS 5e in Japan. Data collected for this review have been added to the World Atlas of Last Interglacial Shorelines (WALIS), following their standardizations on the elements necessary to analyze paleosea-levels. This paper reviewed over 70 studies, assembling data points for over 300 locations and examining related papers denoting sea-level indicators for MIS 5e. The database compiled for this review (Tam and Yokoyama, 2020) is available at https://doi.org/10.5281/zenodo.4294326. Sea-level proxy studies in Japan rely heavily on chronostratigraphic techniques and are recognized as reliable, though opportunities exist for further constraining through the further use of numerical age dating techniques.

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Section: Kantomentioning

confidence: 99%

Section: Kantomentioning

confidence: 99%

A review of MIS 5e sea-level proxies around Japan

Tam

Yokoyama

2021

Earth Syst. Sci. Data

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“…Tephra utilized to constrain sea-level proxy ages are sourced predominantly the Miwa-L pumice layer, in addition to the K-Tz and Hk-KIP-7 layers (Suzuki, 1989). In the Joban region to the south, sea-level proxies are observed with elevations between 23.23±9.46-50±10 m, and increasing drastically south on the Boso Peninsula (maximum elevation of 130±10 m; Sugihara, 1970;Koike and Machida, 2001;Kaizuka, 1987). The tilting towards the northeast is thought to be at least partially due to uplift related to 335 the activity of the Sagami Trough to the southwest of the Boso Peninsula (Tamura et al, 2010).…”

Section: Kanto 325mentioning

confidence: 99%

A Review of MIS 5e Sea-level Proxies around Japan

Tam¹,

Yokoyama²

2020

Preprint

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Abstract. Sea-level proxies for Marine Isotopic Stage 5e (MIS 5e, ca. 124 ka) are abundant along the Japanese shoreline, and have been documented for over at least the last 60 years. The bulk of these sea-level proxies are identified in Japan as marine terraces, often correlated by stratigraphic relationships to identified tephra layers, or other chronologically interpreted strata. Use of stratigraphic correlation in conjunction with other techniques such as paleontological analysis, tectonic uplift rates, tephra (volcanic ash), Uranium-Thorium (U/Th), Carbon-14 (14C), and Optically Stimulated Luminesce (OSL) dating techniques have connected Japan’s landforms to global patterns of sea-level change. This paper reviews over 60 years of publications containing sea-level proxies correlated to forming during MIS 5e in Japan. Data collected for this review have been added to the World Atlas of Last Interglacial Shorelines (WALIS), following their standardizations on the elements necessary to analyze paleo sea-levels. This paper reviewed over 70 studies, assembling data points for 300+ locations and examining related papers denoting sea-level indicators for MIS 5e. The database compiled for this review review (Tam and Yokoyama, 2020) is available at: https://doi.org/10.5281/zenodo.4294326 .

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“…The lowlands along the lower reaches of the Tone River are covered by Holocene sediments (Endo et al, 1983; Sugihara et al, 2011), but the distribution of marine and fluvial terraces at 20–30 m elevation, dating from Marine Oxygen Isotope Stage (MIS) 5a–5e, attests to gradual uplift occurring during the late Pleistocene and Holocene (Sugihara, 1970; Kaizuka, 1987). In addition, Holocene sea-level changes have influenced the topography of the eastern Kanto Plain (Kaizuka et al, 2000).…”

Section: Geological Settingmentioning

confidence: 99%

“…The contour interval in (c) is 10 m (Tani 2015, 2016) and the lake shoreline is based on the Jinsokuzu map created in AD 1886 (Iwasaki et al, 2009; National Institute for Agro-Environmental Sciences 2016). The map in (d) shows the geographic setting of the study area (modified from Sugihara, 1970; Sugihara et al, 2011) and contours representing the height of a marine terrace formed during Marine Oxygen Isotope Stage 5e (Koike and Machida 2001). (e) Map showing the water body area during the Holocene transgression period based on Endo et al (1983).…”

Section: Introductionmentioning

confidence: 99%

Crustal subsidence inferred from reconstruction of the Pleistocene–Holocene palaeogeography in the northern Lake Inba area, central Japan

et al. 2019

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To help characterise the palaeogeographic and lacustrine environmental changes that resulted from the Holocene transgression and residual subsidence in the eastern Kanto Plain of central Japan, we analysed four drill cores and reviewed other core data from the southern part of the Lake Inba area. Fossil diatom assemblages yielded evidence of centennial-scale palaeogeographic and salinity responses to sea-level changes since the late Pleistocene. We determined that the seawater incursion into the Lake Inba area during the Holocene transgression occurred at approximately 9000 yr. We also recognised a late Holocene regression event corresponding to the Yayoi regression, considered to have occurred from ca. 3000 to ca. 2000 yr, and a subsequent transgression. Our data clarify some of the palaeogeographic changes that occurred in the Lake Inba area and document an overall trend toward lower salinity in the lake during the regression. In particular, the environment in Lake Inba changed from brackish to freshwater no later than 1000 yr. From the detailed palaeogeographic and palaeo-sea-level reconstruction, we recognised that residual subsidence occurred during the Holocene in this area. Thus, comparison of sea-level reconstructions based on modelling and fossil diatom assemblages is effective in interpreting Holocene long-term subsidence.

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Geomorphological Developments Gp the Western Shimôsa Upland in Chiba Prefecture, Japan

Cited by 14 publications

References 1 publication

A review of MIS 5e sea-level proxies around Japan

A review of MIS 5e sea-level proxies around Japan

A Review of MIS 5e Sea-level Proxies around Japan

Crustal subsidence inferred from reconstruction of the Pleistocene–Holocene palaeogeography in the northern Lake Inba area, central Japan

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