Statistical Analysis of Grain Size Distribution in Pleistocene Sediments from Lake Biwa, Japan

Kashiwaya, Kenji; Yamamoto, Atsuyuki; Fukuyama, Kunio

doi:10.1016/0033-5894(88)90084-1

Cited by 9 publications

(3 citation statements)

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“…A longer period of 60,000 yr is also indicated in Table 2 although its detection is not considered reliable in view of the short time interval (130,000 yr) covered by the data. However, a periodicity of 60,000 yr may exist, because 60,000-to 70,000-yr periodicities have been reported in other terrestrial data sets, as well as in deep-sea data sets (Kashiwaya et al, 1988(Kashiwaya et al, , 1990.…”

Section: Analysesmentioning

confidence: 95%

“…Recently, several types of terrestrial records have been found to vary with Milankovitch frequencies (1941) during the past 150,000 to 250,000 yr, for example, Lake Biwa sediments in Japan (Yamamoto et al, 1984(Yamamoto et al, , 1985Kashiwaya et al, 1987Kashiwaya et al, , 1988 and the Vostok ice core in Antarctic (Barnola et al, 1987;Jouzel et al, 1987). Long-term climatic changes in Britain also have probably been controlled by global climatic changes.…”

Section: Introductionmentioning

confidence: 99%

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Periodic Variations in Late Pleistocene Speleothem Abundance in Britain

1991

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Temporal change in the growth of speleothems in the United Kingdom during the past 150,000 years is shown to be related to the insolation variation by the Milankovitch theory. The speleothem data compiled by Gordon et al. (1989. Quarternary Research 31, 14–26) have two Milanokovitch frequencies: the ca. 40,000-yr period related to change in the earth's obliquity and the ca. 20,000-yr period related to the precession of the equinoxes. The abundance of speleothem growth was, in general, large during the last interglaciation and small during the last glaciation. In both periods, however, speleothem abundance was greater during periods of strong insolation and less during weak insolation.

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Section: Analysesmentioning

confidence: 95%

Section: Introductionmentioning

confidence: 99%

Periodic Variations in Late Pleistocene Speleothem Abundance in Britain

1991

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“…The particle size distribution of the sediment is mainly controlled by factors such as the transport medium, the handling mode, and the deposition environment. Therefore, the sedimentary environment in which the sediment was deposited can be understood by studying the sediment particle size distribution [50][51][52][53]. The surface sediments of the ancient Milan River channel collected in this study are mainly composed of 6 types of sediment: fine slit, fine silt sand, medium silt sand, coarse silt sand, very coarse silt sand, and very fine sand.…”

Section: Sedimentary Environment Of the Ancient Milan River Channelmentioning

confidence: 99%

Responses of Sediment Properties to Paleoclimatic Changes since the Holocene in Ancient Milan River Channel, Northwest China

Wang¹,

Kasim²,

Aili³

2021

Pol. J. Environ. Stud.

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In this paper, the sediment grain size, organic matter C/N ratio, and isotope δ 13 C of the ancient Milan River channel, Northwest China are used as indicators, and their responses to paleoclimatic changes since the Holocene were analyzed. The results show that the dominant grain size of the surface sediments of the ancient Milan River channel is silt, and the soil particle size is smaller than that of the floodplain, indicating that the hydrodynamics were weak in the late paleochannel. The surface sediments of the paleochannel contain a wind created layer of sand, indicating that the sedimentary environment was affected by a two-phase function of wind and water. The C/N ratio of the sediments varies from 5 to 19.6 with an average value of 12.3. The δ 13 C values range from -27.383‰ to 21.58‰, indicating that the organic matter in the sediment was dominated by river organic matter but mixed with some terrestrial organic matter. The dates of the Optically Stimulated Luminescence (OSL) and the variation in the measured values of each element in the vertical section indicate that since 5000 aBP, the paleoclimate in the study area has experienced six stages of evolution. In stage I, 5000-4500 aBP, the climate was mainly warm and dry. During this period, the climate environment fluctuated frequently, and the cold and warm periods alternated. During stage II, 4500-3900 aBP, the climate gradually decreased and then rebounded slightly. The overall climate was cold and humid, and the water volume increased significantly during this period. During stage III, 3900-2800 aBP, the climate experienced a large temperature increase and cooling, and a warm front appeared around 3000 aBP, indicating typical warm and dry climate characteristics during this period. In stage IV, 2800-1800 aBP, the temperature continued to decrease, and the climate became cold and humid, which was conducive to the growth of crops. In stage V, the first half of the period from 1800 to 1000 aBP was relatively warm and dry, and the temperature dropped briefly causing a cold period. In stage VI, 1000 aBP to present, the temperature experienced a small fluctuation, the climate became dry and

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Physical Background

Scheidegger

1991

Theoretical Geomorphology

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Statistical Analysis of Grain Size Distribution in Pleistocene Sediments from Lake Biwa, Japan

Cited by 9 publications

References 9 publications

Periodic Variations in Late Pleistocene Speleothem Abundance in Britain

Periodic Variations in Late Pleistocene Speleothem Abundance in Britain

Responses of Sediment Properties to Paleoclimatic Changes since the Holocene in Ancient Milan River Channel, Northwest China

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