Correlation of the Neogene Sequences of Eastern Paratethys, the Zaysan Depression, and the Arctic Basin

Yakhimovich, V. L.; Suleymanova, F. I.; Zarkhidze, V. S.; Chumakov, O. Ye.; Popova-L'vova, M. P.; Alimbekova, L. L.

doi:10.1080/00206819009465820

Cited by 5 publications

(3 citation statements)

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“…Early to Middle Pliocene shelf deposits are known from the European part of Russia (Zarkhidze & Samoilovich 1989; Yakhimovich et al 1990), and the Kolvinsk interval is dated to the Gilbert and Gauss chrons (Yakhimovich et al 1990). The mollusc fauna from Store Koldewey is comparable to faunas from these deposits (cf.…”

Section: Correlationsmentioning

confidence: 99%

Early Pleistocene sediments on Store Koldewey, northeast Greenland

Bennike¹,

Knudsen²,

Abrahamsen³

et al. 2010

Boreas

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Marine Quaternary deposits, here named the Store Koldewey Formation, are found at $120 m above sea level in northeast Greenland (761N). The sequence is referred to the Olduvai normal polarity subchron at 1.95-1.78 Ma BP based on palaeomagnetic studies (palaeomagnetically reversed), amino acid epimerization ratios and evidence from marine and non-marine fossils. The sediments and the fauna show that the sequence was deposited on a mid or inner shelf, and some elements of the marine mollusc and foraminiferal assemblages indicate water temperatures between À1 and 111C and seasonal sea ice cover during deposition. Mean summer air temperatures were around 61C higher than at present, as demonstrated by the occurrence of southern extralimital terrestrial species. Wellpreserved remains of land plants indicate that the adjacent land area was dominated by sub-arctic forest-tundra with the trees Larix and Betula, shrubs, herbs and mosses. Most of the species represented as fossils have recent circumpolar geographical ranges. An extinct brachiopod species and an extinct gastropod species have been found, but the other macrofossils are referred to extant species. The brachiopod is erected as a new genus and species, Laugekochiana groenlandica.

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Section: Correlationsmentioning

confidence: 99%

Early Pleistocene sediments on Store Koldewey, northeast Greenland

Bennike¹,

Knudsen²,

Abrahamsen³

et al. 2010

Boreas

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“…The shallow-marine sequences cover only short periods in the Pliocene (e.g. Yakhimovich et al 1990;Brigham-Grette & Carter 1992;Mullen & McNeil 1995;Thiede et al 1996;Fyles et al 1998;Harrison et al 1999;Funder et al 2001;McNeil et al 2001;Polyakova 2001;Bennike et al 2002) and therefore sites drilled during ODP Legs 104, 105, 145, 151 and 162 in the subarctic seas still provide the majority of palaeoenvironmental information. Palaeoceanographic reconstructions in the high northern latitudes are furthermore biased to the period since the intensification of NHG in the Mid-Pliocene (e.g.…”

Section: Pliocene Palaeoceanographymentioning

confidence: 99%

Pliocene palaeoceanography of the Arctic Ocean and subarctic seas

Matthießen

Knies

Vogt

et al. 2008

Phil. Trans. R. Soc. A.

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The Pliocene is important in the geological evolution of the high northern latitudes. It marks the transition from restricted local-to extensive regional-scale glaciations on the circum-Arctic continents between 3.6 and 2.4 Ma. Since the Arctic Ocean is an almost land-locked basin, tectonic activity and sea-level fluctuations controlled the geometry of ocean gateways and continental drainage systems, and exerted a major influence on the formation of continental ice sheets, the distribution of river run-off, and the circulation and water mass characteristics in the Arctic Ocean. The effect of a water mass exchange restricted to the Bering and Fram Straits on the oceanography is unknown, but modelling experiments suggest that this must have influenced the Atlantic meridional overturning circulation. Cold conditions associated with perennial sea-ice cover might have prevailed in the central Arctic Ocean throughout the Pliocene, whereas colder periods alternated with warmer seasonally ice-free periods in the marginal areas. The most pronounced oceanographic change occurred in the Mid-Pliocene when the circulation through the Bering Strait reversed and low-salinity waters increasingly flowed from the North Pacific into the Arctic Ocean. The excess freshwater supply might have facilitated sea-ice formation and contributed to a decrease in the Atlantic overturning circulation.

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“…The stands of island placoric forests, confined to narrow valleys, steppe "saucers", estuaries, and other depressions with a low level of groundwater, were the habitats of species less demanding for moisture, i.e., pine, birch, elm, English oak, etc. Furthermore, the palynological studies of the Holocene sediments of the lower reaches of the river Ural found that, during the phase of the maximum Holocene warming and humidization in the Northern Caspian Sea region, there was the dominance of steppes with pine and deciduous species of oak, hornbeam, linden, and ash [Yakhimovich et al, 1986].…”

Section: Atlantic Period (~ 8000-5000 Bp)mentioning

confidence: 99%

The Evolution of Climate and Landscapes of the Lower Volga Region During the Holocene

Bolikhovskaya¹,

Касимов²

2010

Geogr. environ. sustain.

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The results of the palynological analysis and 14 C dating of the most complete sequences of the Holocene sediments were used for a detailed reconstruction of multi-cyclic alternations of climate phases and zonal and intrazonal plant formations that were taking place the Lower Volga region during the last ten thousand years. Twenty-six phases in evolution of the natural environment during the Holocene were distinguished. Landscape-climatic characteristics and chronological boundaries were identified for these phases. Reconstructed paleoclimatic stages were correlated to the Holocene transgressions and regressions in the Caspian Sea region. The model developed for periodization of climatic events may serve as a climato-stratigraphical framework for future paleogeographical studies of the Holocene in the Northern Caspian region.KEY WORDS: the Lower Volga region, Holocene, pollen assemblages, 14 C dating, vegetation and climate reconstructions, paleo-environments, transgressions and regressions of the Caspian Sea

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Correlation of the Neogene Sequences of Eastern Paratethys, the Zaysan Depression, and the Arctic Basin

Cited by 5 publications

References 0 publications

Early Pleistocene sediments on Store Koldewey, northeast Greenland

Early Pleistocene sediments on Store Koldewey, northeast Greenland

Pliocene palaeoceanography of the Arctic Ocean and subarctic seas

The Evolution of Climate and Landscapes of the Lower Volga Region During the Holocene

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