Correlation of marine events and glaciations on the northeast Atlantic margin

1988 ◽  
Vol 318 (1191) ◽  
pp. 619-635 ◽  
Keyword(s):  
The Netherlands ◽  
Sea Level ◽  
Late Pleistocene ◽  
Littorina Littorea ◽  
British Isles ◽  
Arctica Islandica ◽  
Northwest Germany ◽  
Middle And Late Pleistocene ◽  
Atlantic Margin ◽  
Age Determinations

Stratigraphic units representing high-sea-level events in Britain, northern France, Belgium, The Netherlands, northwest Germany, Denmark, Sweden and Norway, are correlated by aminostratigraphy ( D (alloisoleucine)/ L (isoleucine) (ratios from Littorina littorea, Macoma balthic, Macoma calcarea and Arctica islandica ). The eight sealevel events recognized are modelled with the constraints provided by the oxygenisotope signal of sea-level variability, and available geochronometric age determinations for calibrating the D/L data. These data are used to constrain the timing and extent of glaciations in the British Isles and Scandinavia during the Middle and Late Pleistocene.

The flora and fauna of late Pleistocene deposits on the Cotentin Peninsula, Normandy

1987 ◽  
Vol 315 (1172) ◽  
pp. 231-265 ◽  
Keyword(s):  
Environmental Change ◽  
Sea Level ◽  
Late Pleistocene ◽  
Environmental Changes ◽  
Cold Stage ◽  
Glacial Stage ◽  
Loess Deposits ◽  
Multidisciplinary Studies ◽  
Eemian Interglacial ◽  
Age Determinations

The transition from late interglacial (temperate) to early glacial (cold) stage environments, involving not only climatic deterioration, but also a fall in sea level, has been rarely described. The Cotentin Peninsula, Normandy, lies beyond Pleistocene ice limits, and hence has less stratigraphic complexity than areas characterized by ice advances and retreats. Furthermore, it possesses a number of closely spaced coastal sites where late interglacial to early glacial organomineral sediments are present. These sediments overlie interglacial raised beach deposits, or more ancient wavecut rock platforms, and are succeeded by periglacial (head and loess) deposits. These localities thus afforded an ideal opportunity for detailed multidisciplinary studies of sea level and terrestrial environmental change. Investigation of the geomorphology and stratigraphy was accompanied by palaeobotanical and palaeoentomological analysis of the organomineral deposits. The fossil evidence shows that as sea level fell from a height similar to the present day, the climate cooled from temperate to arctic, and that these changes were accompanied by major modifications in the flora and fauna. Previous stratigraphic, pedological and palynological studies of the sites have been taken to imply multiple environmental changes, with ages ranging from Elsterian to Weichselian. The research described here, together with radiometric age determinations, implies that the raised beach and organomineral sediments were associated with a single marine regression between ca . 121 and 45 ka, that is, late in the Eemian Interglacial and early in the Weichselian Glacial stage. These environmental changes are discussed with reference to those recorded at sites in France and Britain that probably date from the same period.

Th–U disequilibrium dating of Middle and Late Pleistocene wood and shells from Banks and Victoria islands, Arctic Canada

1989 ◽  
Vol 26 (12) ◽  
pp. 2718-2723 ◽  
Author(s):  
C. Causse ◽  
J. -S. Vincent
Keyword(s):  
Late Pleistocene ◽  
Fossil Wood ◽  
Water Circulation ◽  
Middle Pleistocene ◽  
Arctic Canada ◽  
Stratigraphic Framework ◽  
Discontinuous Nature ◽  
Middle And Late Pleistocene ◽  
Age Determinations

An attempt has been made at dating Middle and Late Pleistocene deposits from Banks and Victoria islands using the Th–U disequilibrium method. Geological correlations are difficult to establish because of the discontinuous nature of the terrestrial units and the relative absence of datable fossil wood and shells. The Th–U geochemical system likely remained closed for extended periods because of the presence of permafrost, which implies very limited or absent water circulation. The Th–U age determinations obtained confirmed the previously established stratigraphic framework and provide chronological information in that samples of Sangamonian age are differentiated from those that are younger (Wisconsinan and Holocene) or older (Middle Pleistocene). The Th–U disequilibrium method carefully used in areas where water circulation is limited can thus provide chronological control for sediments older than those that can be dated by the radiocarbon method.

DEFINING THE RESPONSE OF A LOW GRADIENT COASTAL SYSTEM TO RAPID SEA-LEVEL CHANGE DURING THE LATE PLEISTOCENE

2019 ◽  
Author(s):  
Amy W. Cressman ◽  
◽  
David J. Mallinson ◽  
Stephen J. Culver ◽  
Regina DeWitt ◽  
...  
Keyword(s):  
Sea Level ◽  
Late Pleistocene ◽  
Sea Level Change ◽  
Coastal System ◽  
Level Change
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