Stratigraphic distribution and biostratigraphic utility of the fossil diatom Lancineis rectilatus in the central Kanto Plain, central Japan

Naya, Tomonori

doi:10.1016/j.quaint.2018.11.002

Cited by 8 publications

(2 citation statements)

References 29 publications

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“…Selected muddy intervals were sampled for diatom analysis. For diatom analysis, smear slides were prepared following the method described in Naya (2019). Smear slides were mounted in an ultraviolet curing resin (NOA 61: Norland Products Inc., refractive index = 1.56).…”

Section: Sediment Core Description and Samplingmentioning

confidence: 99%

Luminescence chronology for identifying depositional sequences in an uplifted coast since the Middle Pleistocene, eastern Japan

et al. 2022

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Feldspar post-infrared infrared stimulated luminescence (pIRIR) dating is an advantageous trapped-charge dating method concerning late Quaternary sedimentary records for its direct applicability to clastic sediments and wide time coverage. Its application to depositional sequences in various coastal settings potentially improve our understanding of long-term sea-level changes and regional tectonics that the sequences record. The Kanto coastal plain, eastern Japan is situated in a unique tectonic setting near the triple junction of plate boundaries and characterized by extensive development of the Last Interglacial raised marine terrace in contrast to the longer-term subsidence trend. In this article, we document the application of feldspar pIRIR dating to a 35-m-long sediment core collected from the marine terrace in the northeastern Kanto plain and examine how effective its chronology is for identifying depositional sequences related to the relative sea-level fluctuations since the Middle Pleistocene. The sediment core shows a succession of seven facies units, A to G, in ascending order, representing the shallow marine to shelf (units A to C), fluvial to brackish salt marsh (unit D), beach to shoreface (unit E), fluvial to aeolian (unit F), and loess (unit G) sedimentation. According to pre-tests, pIRIR at 225°C after prior infrared stimulated luminescence at 50°C (pIRIR225) was chosen as an optimal signal for dating. pIRIR225 is characterized by modest anomalous fading with an average g2days-value of 1.8%/decade. Fading-corrected pIRIR225 ages are consistent with the stratigraphy. Units A and B are dated as Marine Oxygen Isotope Stage (MIS) 7 and units C to F as MIS 5. However, uncertainties of individual age estimates do not allow further chronological correlation. Instead, using sea-level changes inferred from characteristic facies transitions as additional constraints, units C to F can be correlated to sub-stages in MIS 5. Unit E represents coastal progradation during the MIS 5c sea-level highstand, which refines the date of the marine terrace around the core site as MIS 5c and revises up the rate of the tectonic uplift accordingly. Our results exemplify a successful application of feldspar pIRIR dating for identifying depositional sequences formed in relations to 100-kyr glacial cycles, in which, with additional information of the sedimentary facies, higher-frequency sequences may be defined.

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Section: Sediment Core Description and Samplingmentioning

confidence: 99%

Luminescence chronology for identifying depositional sequences in an uplifted coast since the Middle Pleistocene, eastern Japan

et al. 2022

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“…Our current understanding of the taxonomy, biostratigraphy, and paleobiogeography of diatoms in shallow-marine to brackish environments during the Pleistocene Epoch continues to be poor. In Japan, the biostratigraphy of Lancineis rectilatus Naya (2010: 113), a Pleistocene fossil species of Rhaphoneidaceae (Naya 2010(Naya , 2019, and the stratigraphic distribution of the genus Thalassiosira Cleve (1873: 6) during the last million years (Naya 2012) have been reported from the Kanto Plain, central Japan. But little is known about the past distribution of small araphid diatoms (including opephoroid taxa) in Pleistocene shallow-marine environments.…”

Section: Introductionmentioning

confidence: 99%

<strong><em>Sarcophagodes duodecima sp. nov.</em>, a new small araphid fossil diatom (Bacillariophyceae) from Lower to Middle Pleistocene sediments of Japan</strong>

Naya

Mizuno

2021

Phytotaxa

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A new fossil diatom species, Sarcophagodes duodecima, is described from the Lower to Middle Pleistocene Karato Formation of Himeshima Island, western Japan, based on detailed morphological observation of valves using light and scanning electron microscopes. This new species is characterized by a smaller valve length range, a wide lanceolate central area, shorter striae on the valve face, and longer striae on the mantle than other members of the genus. The new species was also found in the Lower Pleistocene Bushi Formation, central Japan, suggesting that S. duodecima sp. nov. was widely distributed in Japan during Early Pleistocene time. The species composition in the sample chosen as type suggests that the new fossil species occupied a brackish-water habitat. Differences in morphological features from closely related taxa are discussed.

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Unraveling the palaeoecology of Paralia sulcata-dominated assemblages from Late Miocene marine deposits of Patagonia (South Atlantic, Argentina)

Allende Mosquera,

Fayó,

Vélez-Agudelo

et al. 2024

Marine Micropaleontology

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Stratigraphic distribution and biostratigraphic utility of the fossil diatom Lancineis rectilatus in the central Kanto Plain, central Japan

Cited by 8 publications

References 29 publications

Luminescence chronology for identifying depositional sequences in an uplifted coast since the Middle Pleistocene, eastern Japan

Luminescence chronology for identifying depositional sequences in an uplifted coast since the Middle Pleistocene, eastern Japan

<strong><em>Sarcophagodes duodecima sp. nov.</em>, a new small araphid fossil diatom (Bacillariophyceae) from Lower to Middle Pleistocene sediments of Japan</strong>

Unraveling the palaeoecology of Paralia sulcata-dominated assemblages from Late Miocene marine deposits of Patagonia (South Atlantic, Argentina)

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