Evolution of Central European regional mammal assemblages between the late Middle Pleistocene and the Holocene (MIS7–MIS1)

Abstract Extensive studies of Quaternary transgressions have been conducted in Bohai Sea, but debates continue regarding the sedimentary evolution and timing of transgressions, especially in the Pleistocene section. Benthic foraminifers and ostracodes from three boreholes (GK138, GK111, GK95) at Laizhou Bay, Bohai Sea, were utilized to interpret the paleoenvironments of deposition and elucidate the coastal response to global sea-level changes since the late Quaternary. Benthic foraminiferal species identified included 32 species from 15 genera; ostracodes included 28 species from 16 genera. Three marine sedimentary beds were recognized based on sedimentary characteristics, down-core changes in environmental proxies (benthic foraminifers and ostracodes), accelerator mass spectrometry (AMS) 14C, and optically stimulated luminescence (OSL) dates. These three beds were interpreted as: marine sedimentary bed 3 (M3), deposited in the late-middle Pleistocene; marine sedimentary bed 2 (M2), deposited during the late Pleistocene; and marine sedimentary bed 1 (M1), deposited during the Holocene. Three microfossil assemblages were identified, all indicating nearshore conditions. Assemblage III indicated a fluvially influenced or paralic environment during a relatively small-scale late-middle Pleistocene transgression that produced bed M3. Assemblage II indicates an intertidal-subtidal environment where bed M2 was deposited during the late Pleistocene transgression. Assemblage I indicates somewhat more marine influence in a subtidal environment where bed M1 was deposited during the Holocene marine transgression.

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Review for "A decrease in temperature during the late Middle Pleistocene interglacial stage (MIS 7.3) altered montane zone floral diversity: Plant macrofossil evidence from central Japan"

10.1002/gj.3833/v2/review1 ◽

2020 ◽

Keyword(s):

Middle Pleistocene ◽

Central Japan ◽

Plant Macrofossil ◽

Floral Diversity ◽

Montane Zone ◽

Late Middle Pleistocene

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Dépôts argilo-tourbeux du Pléistocène moyen à l'Holocène sur la côte atlantique française à Brétignolles (Vendée) [Pollen analysis of peat and clay sediments dating from the middle pleistocene to the holocene deposited on the french atlantic coast]

Quaternaire ◽

10.3406/quate.1999.1642 ◽

1999 ◽

Vol 10 (2) ◽

pp. 189-197 ◽

Cited By ~ 1

Author(s):

Jacques Bernard

Keyword(s):

Pollen Analysis ◽

Atlantic Coast ◽

Middle Pleistocene ◽

The Holocene ◽

Pléistocène Moyen

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Changes in Paleovegetation and Paleoclimate in China Since the Late Middle Pleistocene: A Case Study of the Dajiuhu Basin

Sustainability ◽

10.3390/su13094848 ◽

2021 ◽

Vol 13 (9) ◽

pp. 4848

Author(s):

Liwei Wu ◽

Xinling Li ◽

Qinghai Xu ◽

Manyue Li ◽

Qiufeng Zheng ◽

...

Keyword(s):

Grain Size ◽

Asian Monsoon ◽

East Asian Monsoon ◽

Asian Summer Monsoon ◽

East Asian ◽

Central China ◽

Middle Pleistocene ◽

Pollen Record ◽

The Difference ◽

Late Middle Pleistocene

The East Asian monsoon system is an important part of global atmospheric circulation; however, records of the East Asian monsoon from different regions exhibit different evolutionary rhythms. Here, we show a high-resolution record of grain size and pollen data from a lacustrine sediment core of Dajiuhu Lake in Shennongjia, Hubei Province, China, in order to reconstruct the paleovegetation and paleoeclimate evolution of the Dajiuhu Basin since the late Middle Pleistocene (~237.9 ka to the present). The results show that grain size and pollen record of the core DJH-2 are consistent with the δ18O record of stalagmites from Sanbao Cave in the same area, which is closely related to the changes of insolation at the precessional (~20-kyr) scale in the Northern Hemisphere. This is different from the records of the Asian summer monsoon recorded in the Loess Plateau of North China, which exhibited dominant 100-kyr change cyclicities. We suggest that the difference between paleoclimatic records from North and South China is closely related to the east–west-oriented mountain ranges of the Qinling Mountains in central China that blocked weakened East Asia summer monsoons across the mountains during glacial periods.

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Poland and New Trends in Central European Regional Configuration

Contemporary Europe ◽

10.15211/soveurope120215261 ◽

2021 ◽

Vol 101 (1) ◽

pp. 52-61

Author(s):

Maria Rusakova ◽

Keyword(s):

Baltic Sea ◽

Central Europe ◽

Regional Integration ◽

The Baltic Sea ◽

Central European ◽

Eastern Partnership ◽

Carpathian Region ◽

Wide Range ◽

The Baltic ◽

European Regional

The article examines Warsaw's attempts to expand its influence in Central Europe by initiating various regional integration projects: cooperation with the Baltic sea countries participation in the development of the Carpathian region the newest format – the Lublin Triangle. The content of the Lublin Declaration signed on July 28, 2020 by Lithuania, Poland and Ukraine is analyzed in detail. Having been convinced by the example of Ukraine that the Eastern Partnership policy does not allow for quick results, as well as in connection with the events in Belarus, Poland decided to create a regional initiative that can be considered as a continuation of the Eastern Partnership policy. The Lublin Declaration opens up a wide range of potential areas of cooperation, however it is still too early to say how successful this project will be. Initially it was planned that Belarus would also join the Lublin Initiative, but later Minsk refused to participate. This seriously limited the project, but does not exclude the possibility of future innovations in its format. The author concludes that the Lublin Triangle is one of the Warsaw's instruments to realize the idea of Intermarium

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Luminescence dating of a late Middle Pleistocene glacial advance in eastern England

Netherlands Journal of Geosciences – Geologie en Mijnbouw ◽

10.1017/njg.2021.13 ◽

2021 ◽

Vol 100 ◽

Author(s):

Philip L. Gibbard ◽

Mark D. Bateman ◽

Jane Leathard ◽

R.G. West

Keyword(s):

Previous Investigation ◽

Alluvial Fan ◽

Luminescence Dating ◽

Marine Isotope Stage ◽

Middle Pleistocene ◽

Eastern Margin ◽

First Time ◽

Late Middle Pleistocene ◽

Glacial Advance

Abstract Previous investigation of isolated landforms, on the eastern margin of the East Anglian Fenland, England, has demonstrated that they represent an ice-marginal delta and alluvial fan complex deposited at the margin of an ice lobe that entered the Fenland during the ‘Tottenhill glaciation’ (termed the ‘Skertchly Line’). They have been attributed, based on regional correlations, to a glaciation during the Late Wolstonian (i.e. Late Saalian) Substage (Drenthe Stadial, early Marine Isotope Stage (MIS) 6). This paper aimed to test this correlation by directly optically luminescence dating, for the first time, sediments found within the Skertchly Line at Shouldham Thorpe, Norfolk, and Maidscross Hill, Suffolk, together with those in associated kame terrace deposits at Watlington, Norfolk. Ages ranged from 244 ± 10 ka to 12.8 ± 0.46 ka, all the results being younger than MIS 8 with some clearly showing the landforms have been subsequently subjected to periglacial processes, particularly during the Late Devensian Substage (∼MIS 2). Most of the remainder fall within the range 169–212 ka and could be assigned to MIS 6, thus confirming the previously proposed age of the glaciation. The local and regional implications of these conclusions are discussed, the maximum ice limit being linked to that of the Amersfoort–Nijmegen glaciotectonic ridge limit in the central Netherlands.

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Holocene history of boreal forest landscapes of the Central European Russia

10.5194/egusphere-egu21-14681 ◽

2021 ◽

Author(s):

Vladimir Belyaev ◽

Ilya Shorkunov ◽

Katerina Garankina ◽

Nikita Mergelov ◽

Yulia Shishkina ◽

...

Keyword(s):

Boreal Forest ◽

Late Pleistocene ◽

Gully Erosion ◽

European Russia ◽

Empirical Modeling ◽

Snowmelt Runoff ◽

Central European ◽

The Holocene ◽

High Magnitude ◽

Late Pleistocene To Holocene

Recent detailed investigations of landforms, soils and surface deposits of the Borisoglebsk Upland northeastern slope within the Nero Lake basin (Central European Russia, Yaroslavl Region) allowed deciphering co-evolution of the major landscape components of the case study area since the Late Pleistocene. The Late Pleistocene to Holocene transition in the gully network was represented by relatively short but high-magnitude (up to 12 m) incision phase followed by significant infill till 6.5 ka. Absence of the well-developed early Holocene paleosols in the studied sections and cores suggests dominantly negative sediment budget. There is so far limited evidence of sedimentation over the first half of the Holocene. Discontinuous deposition with certain interruptions (but without distinct buried soil formation) occurred only within closed depressions and on gully fans. The second part of the Holocene prior to the widespread human settlement left more substantial traces in soil and sediment record. Despite the common perception of the pristine boreal forest landscapes to be geomorphologically stable due to erosion-protective role of woodland vegetation, several phases of dramatically increased soil and gully erosion rates have been identified. It is identified in soil bodies and sediments, both at locations dominated by denudation (evidences of multiple topsoil truncation in Atlantic and Subatlantic) and at zones of alternating incision and infill of small linear erosion features. Such extremes were most likely associated with combination of several triggers including natural forest fires and high-magnitude rainfall or snowmelt runoff events. There are several 14C dated layers of pyrogenic charcoal indicating pre-anthropogenic wildfire-induced incision and infill cycles during the middle and late Holocene.The last phases of increased hillslope and fluvial activity within the study area can be related to increased human interference, starting from about 1600-900 years ago. The onset of cut-and-burn cultivation is independently established from available archeological evidences, dating of cut and burnt tree logs remnants, organic material buried by agrogenic colluvium and gully fans. Latest period of intensive gully growth can most likely be attributed to the XIXth Century land tenure reform, when most of the study area gullies experienced significant linear growth, bottom incisions and appearance of several new gully branches. The most recent trend of soil and gully erosion has been evaluated by 137Cs sediment tracing, soil empirical modeling and comparison of historical and modern maps, airborne photos and satellite images. Rates of soil redistribution on slopes decreased significantly over the last several decades due to combination of natural and anthropogenic impacts: 1) decreased spring snowmelt runoff caused mainly by generally lowered thickness of seasonally frozen topsoil layer; 2) arable land abandonment or shift from row crops and cereals to perennial grass-dominated crop rotations in the post-Soviet period. In addition, local short-term (from several years to within-year) cycles of relatively low-magnitude (not exceeding &#177;1 m range) incision and infill in gullies are often triggered by biogenic activities, namely beaver dam constructions and breaches and local log jams.The study is supported by the Russian Science Foundation (Project No. 19-77-10061) and Russian Foundation for Basic Research (Project No. 19-29-05238).

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