Results 1 to 10 of about 386 (139)

Implications of the geochemistry of L1LL1 (MIS2) loess in Poland for paleoenvironment and new normalizing values for loess-focused multi-elemental analyses

open access: yesQuaternary Research
AbstractLoess paleoenvironmental reconstructions on regional to supra-regional scales have recently gained much attention. Geochemistry comparisons in relation to reference datasets, such as the Upper Continental Crust (UCC) data, have furthered our understanding of the climatic and geomorphological conditions under which terrestrial sites have ...
Jacek Skurzyński   +2 more
exaly   +4 more sources

Sediment and carbon accumulation in a glacial lake in Chukotka (Arctic Siberia) during the Late Pleistocene and Holocene: combining hydroacoustic profiling and down-core analyses [PDF]

open access: yesBiogeosciences, 2021
Lakes act as important sinks for inorganic and organic sediment components. However, investigations of sedimentary carbon budgets within glacial lakes are currently absent from Arctic Siberia.
S. A. Vyse   +12 more
doaj   +1 more source

A machine learning approach using legacy geophysical datasets to model Quaternary marine paleotopography

open access: yesApplied Computing and Geosciences, 2023
High-resolution subsurface marine mapping tools, including chirp and 3D seismic, enable the reconstruction of ancient landscapes that have been buried and subsequently submerged by marine transgression.
Jeffrey Obelcz   +4 more
doaj   +1 more source

Relation of loess units and prehistoric find density in the Garzweiler open-cast mine, Lower Rhine [PDF]

open access: yesEiszeitalter und Gegenwart, 2011
Auf der Basis einer detaillierten Lössstratigraphie wurden auf dem Lössplateau des westlichen Niederrheins von einer Abbauwandgesamtfläche von 11.000qm die Anteile der wichtigsten Lösseinheiten berechnet.
H. Kels, W. Schirmer
doaj   +1 more source

Dark humic alluvial paleosols in Central and Southern Mexico: Micromorphological indicators of Late Pleistocene megafauna habitats Paleosuelos aluviales con humus oscuro en el Centro y Sur de México: indicadores micromorfológicos de los hábitats de la megafauna del Pleistoceno tardío Paleosolos aluviais com húmus escuro no Centro e Sul do México: indicadores micromorfológicos dos habitats da megafauna do Pleistocénico tardio [PDF]

open access: yesSpanish Journal of Soil Science, 2013
During the Late Pleistocene, Mexico had a richer fauna than today with many different forms of megafauna that are now extinct. However, the ecosystems they inhabited and the particular ecological niches that they occupied are still poorly understood ...
Rosa E. Tovar   +3 more
doaj   +1 more source

Distinctive Sedimentary Evolution at the East Edge of the Central Yellow Sea Mud Over the Past 45 kyr: Evidence From Detrital Mineralogy

open access: yesFrontiers in Earth Science, 2022
The central Yellow Sea Mud (CYSM) is a vital part of the coastal sand and distal mud depositional system in the South Yellow Sea (SYS). Previous studies concerning the sedimentary evolution of this area have almost exclusively concentrated on its ...
Yao Zhang   +7 more
doaj   +1 more source

Aridity synthesis for eight selected key regions of the global climate system during the last 60 000 years [PDF]

open access: yesClimate of the Past, 2020
A compilation of the published literature on dust content in terrestrial and marine sediment cores was synchronized with pollen data and speleothem growth phases on the Greenland Ice Core Chronology 2005 (GICC05) time axis.
F. Fuhrmann   +4 more
doaj   +1 more source

Hydroclimatic variability of opposing Late Pleistocene climates in the Levant revealed by deep Dead Sea sediments [PDF]

open access: yesClimate of the Past, 2021
Annual and decadal-scale hydroclimatic variability describes key characteristics that are embedded into climate in situ and is of prime importance in subtropical regions.
Y. Ben Dor   +8 more
doaj   +1 more source

Nutrient utilization and diatom productivity changes in the low-latitude south-eastern Atlantic over the past 70 ka: response to Southern Ocean leakage [PDF]

open access: yesClimate of the Past, 2021
Eastern boundary upwellings (EBUs) are some of the key loci of biogenic silica (opal) burial in the modern ocean, representing important productive coastal systems that extraordinarily contribute to marine organic carbon fixation.
K. Hendry   +3 more
doaj   +1 more source

Late quaternary glacial history of the La Ji Shan: Implications for the LGM on the northeastern Tibetan Plateau

open access: yesFrontiers in Earth Science, 2023
Previous studies have suggested that the Bayan Har Shan and Lake Donggi Cona areas on the northeastern Tibetan Plateau were not glaciated during the Last Glacial Maximum (LGM; MIS2).
Hang Cui   +5 more
doaj   +1 more source

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