A Middle Pleistocene glacial–interglacial succession in the Inner Silver Pit, southern North Sea

1998 ◽  
Vol 17 (9-10) ◽  
pp. 901-911 ◽  
Author(s):  
Peter Kristensen ◽  
Karen Luise Knudsen ◽  
Hans Petter Sejrup
2016 ◽  
Vol 4 (4) ◽  
pp. T461-T483 ◽  
Author(s):  
Antonio Benvenuti ◽  
Andrea Moscariello

The deep Middle Pleistocene subglacial incisions of the Southern North Sea (SNS) are commonly infilled by northward gently dipping clinoforms oriented toward the former ice-sheet core. We have focused on the terminal sector of the largest tunnel valley (TV) of the SNS and offer the first high-resolution reconstruction of the geomorphology and stratigraphy of the infill of the glacial incision, as well as the detailed geomorphology of the incision to better understand the genetic mechanisms of these uncommon but peculiar large-scale (up to 13 km in length) bedforms. For this study, high-resolution 3D seismic data, the grain-size distribution from ditch cutting samples, and the gamma-ray wireline log of borehole K14-12 are used. The TV formed in the subglacial environment by steady state flows in a time-transgressive fashion. Meltwater flow transports the eroded material southward and eventually deposits it at the ice-sheet margin, in the lightly grounded ice-sheet environment where the adverse slope forces the flow to wane. The process results in an elongated ice-margin fan made of clinoforms, whose grain-size distribution fines progressively southward, in the downstream direction. The formation and filling of the TV occurred during the retreat of the ice-sheet margin and cyclic fluctuations of the meltwater mass flow rate, which affected the internal stratigraphy and created an undulated top of the clinoforms’ unit. Sparsely distributed, horizontally layered units interpreted as distal proglacial lacustrine deposits filled depressions on the top of the clinoforms-bearing unit. The sequence was then sealed by a chaotic seismic-stratigraphic unit that probably belongs to postglacial times. The ice-sheet-oriented clinoforms were thus formed by sustained meltwater flow resulting from large-size Scandinavian and British convergent ice sheet flows in the freshwater environment of SNS developed between the complex ice margins and the topographic highs inherited from continental Europe.


1991 ◽  
Vol 10 (1) ◽  
pp. 23-52 ◽  
Author(s):  
P.L. Gibbard ◽  
R.G. West ◽  
W.H. Zagwijn ◽  
P.S. Balson ◽  
A.W. Burger ◽  
...  

2014 ◽  
Vol 93 (1-2) ◽  
pp. 43-53 ◽  
Author(s):  
W. Roebroeks

AbstractFor major parts of the Palaeolithic substantial areas of the current southern North Sea and what later became the English Channel were dry land. Those areas, now covered by tens of metres of sea, were occasionally core areas for large herds of herbivores and the animals that preyed upon them, including Palaeolithic hunter-gatherers. This is demonstrated by the large amounts of Pleistocene mammal fossils, artefacts and a Neanderthal fossil recovered during the last one and a half centuries. Any consideration of the Pleistocene occupation history of northwest Europe needs to deal with the fact that a major part of the landscape available to Pleistocene hunter-gatherers is currently submerged under the waters of the North Sea, one of the most prolific Pleistocene fossil-bearing localities world-wide. One also needs to take into account the complex landscape evolution of the southern North Sea basin, with geographically varying successions of marine, lacustrine, fluvial and glacial sedimentation and erosion. This paper gives a short overview of the occupation history of northwest Europe, from its earliest traces at the very end of the Lower and the beginning of the Middle Pleistocene up to the middle part of the Upper Palaeolithic, when this part of Europe became deserted for a period of about 10,000 years. Tentative interpretations and questions raised by the overview will be situated in the context of the information potential of the deposits in the southern North Sea and the Channel area.


2016 ◽  
Vol 32 (2) ◽  
pp. 261-275 ◽  
Author(s):  
Tom S. White ◽  
David R. Bridgland ◽  
Rob Westaway ◽  
Allan Straw

1998 ◽  
Vol 17 (9-10) ◽  
pp. 871-900 ◽  
Author(s):  
J.D Scourse ◽  
M.H Ansari ◽  
R.T.R Wingfield ◽  
R Harland ◽  
P.S Balson

2012 ◽  
Vol 368 (1) ◽  
pp. 111-127 ◽  
Author(s):  
Dagmar Müther ◽  
Stefan Back ◽  
Lars Reuning ◽  
Peter Kukla ◽  
Frank Lehmkuhl

Author(s):  
Tom Meijer ◽  
Ronald Pouwer ◽  
Piet Cleveringa ◽  
Hein de Wolf ◽  
Freek S. Busschers ◽  
...  

Abstract When dealing with stratigraphic successions in marginal basin settings, the geological record is often fragmented due to erosion and reworking processes. The North Sea Basin is an example: it has a fragmented Quaternary record; in particular, Middle Pleistocene intervals are poorly known. As a result, we have little insight into climate, marine environmental conditions and biodiversity in this period. Here we describe and discuss a succession of three interglacial marine mollusc-bearing intervals in a borehole from Ameland in the northern Netherlands (borehole B01H0189 near Hollum). These intervals are attributed to marine isotope stages MIS7, MIS5e and MIS1. The Holocene Celtic type of faunas (interval 0–26.24 m below surface (b.s.)) and Eemian Lusitanian type of faunas (26.24–30.40 m b.s.) are well-known from previous research. The newly reported MIS7 Oostermeer fauna (32.80–39.00 m b.s.) represents mostly full marine settings between storm wave base and fair-weather wave base. In composition and diversity, the MIS7 and MIS1 faunas strongly resemble and differ from the MIS5e fauna. This is the first well-documented record of three stacked marine interglacial assemblages from the southern North Sea Basin at one location. This new record enables us to make complete marine faunal characterisations of successive interglacial periods. Key implications for southern North Sea stratigraphy and palaeogeography are the resemblance of marine faunas and conditions in MIS7 and MIS1, the presence of a relatively warm latest MIS6 freshwater interval and confirmation and characterisation of the warm Eemian interval north of the classical type area.


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