In this part of Chile, altitudinal belts changed their position vertically during the UpperQuaternary as humidity changed. Present soils are relicts of the humid Late Glacial and a humid Holocene climate optimum.―(DWG)
KARAPINAR, EREGLI VE AKSARAY ARASINDA KALAN MINTAKADA UST-PLIOSEN-KUATERNER VOLKANIZMASI VOLCANIC ACTIVITY AMONG KARAPINAR, EREGLI AND AKSARAY DURING UPPER PLIOCENE-QUATERNARY
The quaternary foreland-sedimentation at the edge of the Styrian SE-Alps (upper Raab/Rába-catchment area near Hungary) is analysed. This environment is based on the particular high-metamorph bedrocks in the upper-drainage areas and the asymmetric
drift of the braided rivers under periglacial conditions during cold-quaternary times. - (JS)
AMS radiocarbon age of the Upper Mississippi Valley Roxana silt
C14 dating ; Dating ; Lithology ; Loess ; Minnesota ; Palaeogeography ; Pedogenesis ; Quaternary ; United States ; Wisconsin
Accelerator mass spectrometer radiocarbon ages of the Roxana Silt (Loess) along the Upper Mississippi Valley of Wisconsin and Minnesota indicate that loess sedimentation of the Roxana Silt occurred between about 55,000 and 27,000 14C yr B.P
. The bracketing ages for the Upper Mississippi Valley Roxana Silt indicate that the Mississippi River valley was receiving outwash sedimentation between 55,000 and 27,000 14C yr B.P.
Diversion of the upper Bear River: glacial diffluence and Quaternary erosion, Sierra Nevada, California
California ; Channel geometry ; Downcutting ; Drainage network ; Fluvial processes ; Glacial erosion ; Lateral moraine ; Meltwater ; Palaeogeography ; Quaternary ; Sierra Nevada ; Stratigraphy ; United States of America ; Valley
Deep canyon erosion and diversion of more than 300 km2 of the former upper Bear River is documented with stratigraphic and morphologic evidence. A hypothesis is presented that the channel diversion and much of the local South Yuba valley incision
at the site were induced by glacial erosion during the Quaternary period.
Upper Cenozoic of the Southern North Sea basin: palaeoclimatic and palaeogeographic evolution
An outline is presented of Neogene and Quaternary biozonation and lithostratigraphy of the southern North Sea Basin. The maps showing the thickness distribution of the Upper Miocene deposits and the depth contours of the base of the Quaternary
depict the basin evolution. The pattern of basin development in the Quaternary differs distinctly from that in Neogene times| resemblance with the pattern in Mesozoic times is ascribed to reactivated downwarping in areas of much earlier, namely Mesozoic
, basin development. Considerably greater amounts of sediments were accumulated per time unit in the southern North Sea Basin during the Quaternary as compared to the Neogene.
The Neogene red clays of the Carpathian basin in Problems of the Neogene and Quaternary in the Carpathian Basin.
Opinions differ as to whether the true red clays mostly deposited on Upper Pannonian lacustrine sediments are dated as Pliocene or early Quaternary. Biostratigraphic and lithostratigraphic data show that these non-rewashed residual deposits of red
Quaternary paleolake formation and cataclysmic flooding along the upper Yenisei River
Asian part of Russia ; Catastrophe ; Flood ; Geomorphology ; Glacial features ; Holocene ; Mongolia ; Palaeolake ; Quaternary ; Remote sensing ; Sedimentology ; Siberia ; Simulation ; Upper Pleistocene ; Watershed
to the complex cataclysmic flood and paleolake stories of the upper Yenisei River. Investigations of flood features and paleolakes along the upper Yenisei River were conducted by remote sensing and fieldwork. In order to investigate flood behavior, the AA
. conducted computer simulations. Based on the paleolake data, and the pristine appearance of the flood-related features, the AA. conclude that many of the catackysmic floods occurred in the late Quaternary.
[b3] Quaternary Research Center, Univ. Washington, Seattle, Etats-Unis
The influence of Himalayan uplift on the development of Quaternary glaciers in Quaternary of the Karakoram and Himalaya.
Four models of Quaternary glaciation are described with reference to evidence on both sides of the Himalaya. On the north side, the most extensive glaciation occurred during the Nieniexongla stage of the middle Pleistocene but, on the south side
, the largest glacial cover occurred during the early part of the Upper Pleistocene. A major ice sheet covering the whole of the Qinghai-Xizang Plateau can be ruled out on the basis of geological evidence and climatological theory, although many medium-sized ice
Upper cretaceous to quaternary sedimentary processes in the Bay of Biscay from textural, mineralogical, and coarse fraction studies
of the margin| 5it appears that the lowermost Upper Cretaceous hiatus and the upper Eocene hiatus are related to changes in the physiographic (and hydrologic?) environment at an oceanic rather than regional scale.
Stratigraphic, palynological, sedimentological, geophysical and mollusc analyses of 3 peat cores from palaeomeanders in the floodplain of the Southern Palatine Upper Rhine river valley were used to reconstruct interrelations between palaeohydrologic
in the Younger Holocene. Sediment layers within the upper peat layers of the palaeomeanders show a vast increase of flood activity of the Upper Rhine river since the High- and Late Middle Ages. From that time onwards huge areas of the Rhine river floodplain were
Geomorphic and stratigraphic complexity : Holocene alluvial history of Upper Wollombi Brook, Australia
Alluvium ; Australia ; Flood ; Holocene ; Human occupation ; Lithology ; New South Wales ; Quaternary ; Stratigraphy ; Threshold ; Watershed
The aims of this paper are to determine whether the terrace and floodplain sequences of 3 streams in the upper Wollombi Brook drainage basin are the same and whether they responded to European settlement in a similar manner. After describing
A mid-Holocene alluvial deposit beneath blanket peat in the upper Liffey Valley, County Wicklow, Ireland
Alluvium ; C 14 dating ; Holocene ; Ireland ; Palaeo-environment ; Palaeovalley ; Peat bog ; Quaternary ; Stratigraphy
This paper describes a recently exposed cross section of a small valley buried beneath blanket peat on the upper slopes of the Liffey valley in the Wicklow Mountains, eastern Ireland, and examines its significance to the understanding of early