The Holocene floodplain evolution of the river Ilme and its distal tributaries in the uplands of Lower Saxony has been reconstructed by shallow corings arranged in cross and longitudinal profiles. The AA. differentiate three Holocene fluvial units
overlying the Weichselian Lower Terrace : a fine-grained Humus Basal Layer (early-middle Holocene), and Older Meadow Loam (8th-early 14th century) and a Younger Meadow Loam (since 15th century).
C 14 dating ; Evapotranspiration ; Holocene ; Lake ; Lake level ; Model ; Palynology ; Precipitation ; Rill wash ; Sweden
This paper investigates whether it is possible to reproduce the observed lake-level changes at Bysjön through the Holocene by combining the effects of precipitation changes and known changes in radiation and temperature regimes, and whether
this results in more plausible estimates of changes in Holocene precipitation. These investigations are carried out using a physically based lake-catchment model, driven by known changes in radiation and temperature regimes and by systematic changes
in precipitation at 1000-yr intervals through the Holocene.
Asian part of Russia ; Glaciation ; Glacier fluctuation ; Holocene ; Kamchatka ; Lichenometry ; Moraine ; Quaternary ; Russian Far East ; Tephrochronology
This study investigates the Holocene chronology of glacier fluctuations in the headwaters of Sredniaya Avacha, a tributary to Avacha. Holocene glacial deposits are subdivided into 3 age groups based upon geomorphic features, tephrochronology
, and lichenometry. Glacial deposits at altitudes between 1000 and 1500 m suggest extensive Holocene glaciation.
Climatic variation ; Holocene ; Minnesota ; Model ; Palynology ; Pollen diagram ; Quaternary ; United States
The Holocene pollen sequence in the Minnesota area is « asymmetric » around the so-called prairie period : the early Holocene is dominated by elm and the late Holocene by oak. The elm zone is interpreted as a manifestation of summer monsoonal rains
Short-duration Holocene lakes in the Mojave river drainage basin, southern California
California ; Etats-Unis ; Holocène ; Niveau lacustre ; Paléo-environnement ; Quaternaire ; Stratigraphie ; Sédimentologie ; Variation climatique
California ; Climatic variation ; Holocene ; Lake level ; Paleo-environment ; Quaternary ; Sedimentology ; Stratigraphy ; United States
Discusses evidence of middle to late Holocene lake-level fluctuations recorded in the terminal basins of the Mojave River. Presents stratigraphic and sedimentologic evidence of the occurrence of shallow, short-duration, middle to late Holocene lakes
in the terminal playas of the Mojave River in southern California. A possible cause for these short-term wet climatic episodes, as recorded by historic and Holocene lakes is proposed.
In this paper, pollen and diatom data and chemical and physical analyses of 2 lacustrine sequences are combined to reconstruct the Holocene history of desertification and its relationship to monsoon oscillation and vegetation development
. The objectives of this paper are to reconstruct Holocene environmental changes in this ecotonal region using multiple paleoecological data and to discuss the ecological mechanism and driving factors of Holocene desertification in southeastern Inner Mongolia.
China ; Glacier ; Glacier fluctuation ; Holocene ; Palaeo-environment
Des études géomorphologiques et des recherches historiques ont permis de reconstruire les fluctuations holocènes du Glacier Yanzigou, situé sur le versant oriental du Gongga Shan, le massif montagneux chinois le plus élevé, à l'est de l'Himalaya
Based on phylogenetical, palaeoecological and biostratigraphical studies on the Holocene malacofauna of Hungarian medium high mountains and flatlands, four faunal periods could be recognised in the mountains, while three ones on the flat regions
In this paper the Holocene glacial record, as inferred from the radiocarbon-dated section with alternating minerogenic and organic sediments beyond the maximum Little Ice Age marginal position of Blaisen, is described and discussed in relation
to the Scandinavian Holocene glacial and climatic record.
Following a brief overview of the Holocene evolution of the river Scheldt, the late Holocene evolution of the tidal part of the river is presented in detail. A number of different phases could be distinguished.
Cet article de synthèse aborde le problème des changements eustatiques durant l'holocène moyen entre 7800 et 4400 BP, considère les preuves de la relation age/altitude et les modèles d'évolution du littoral.
Plant remains in the Sierra Bacha packrat midden series permit the first reconstruction of Holocene vegetation and climate for the coast of the Gulf of California. Discussion of their paleoclimatic implications and their contradiction
Arizona ; Climatic variability ; Diatom ; Holocene ; Lacustrine sediment ; Lake level ; Mollusca ; Palaeo-environment ; Palynology ; Pollen diagram ; United States of America
Data from pollen, plant macrofossils, diatoms, mollusks, and fish bones and scales are combined with geologic data to provide the most detailed Holocene record yet available for the southern Colorado Plateau.
The purpose of this paper is to compile information on marine fossils in beaches around Antarctica that may have been impacted by meltwater associated with ice sheet marginal variations during the Holocene.
Asian part of Russia ; Baikal ; C 14 dating ; Holocene ; Ice wedge ; Isotope analysis ; Oxygen 18 ; Palaeotemperature ; Periglacial features ; Quaternary ; Sakha ; Siberia ; Stratigraphy
Présentation de la cryostratigraphie des coins de glace holocènes en Sibérie occidentale, Yakoutie et Transbaïkalie. Des datations C 14 et des déterminations des isotopes de l'oxygène suggèrent que quelques uns de ces coins de glace ont grandi
syngénétiquement pendant l'optimum climatique holocène.
Permafrost changes in the northern Tien Shan during the Holocene
Anomalie thermique ; Cryoturbation ; Holocène ; Kazakhstan ; Montagne ; Paléogéomorphologie ; Pergélisol ; Périglaciaire ; Sondage ; Température du sol ; Tien Chan
Cryoturbation ; Holocene ; Kazakhstan ; Mountain ; Palaeogeomorphology ; Periglacial features ; Permafrost ; Soil temperature ; Sounding ; Thermal anomaly ; Tien Shan
Description de l'évolution du pergélisol dans le Tien Shan septentrional pendant l'Holocène. Elle est basée sur l'interprétation d'une courbe de température obtenue dans un sondage profond effectué au col du Zhusalykezen, à 3336 m d'altitude. Mise
en évidence de fluctuations thermiques, au cours de l'Holocène, liées à la présence d'îlots de pergélisol fossile et de structures cryogéniques.