scholarly journals The stratigraphic position of a Pliocene tidal clay deposit at Grobbendonk (Antwerp Province, Belgium)

2001 ◽  
Vol 3 (3-4) ◽  
pp. 405-417 ◽  
Author(s):  
Noël VANDENBERGHE ◽  
Jacques HERMAN ◽  
Pieter LAGA ◽  
Stephen LOUWYE ◽  
Stijn DE SCHEPPER ◽  
...  
Keyword(s):  
The Netherlands ◽  
Pollen Analysis ◽  
Regional Analysis ◽  
Cold Climate ◽  
Formation Time ◽  
Clay Deposit ◽  
Stratigraphic Analysis ◽  
Stratigraphic Position

In a section located in Grobbendonk (Antwerp Campine area, Belgium) a tidal clay deposit is described which according to regional analysis could correlate with the Kruisschans Member of the Pliocene Lillo Formation. Mollusc and fish fossils point to a colder climate during the deposition of the Kruisschans Sand. A pollen analysis of the Grobbendonk clay shows that it was formed during a cold climate, either during the Pretiglian or during the Pliocene. The latter possibility is preferred because of the regional stratigraphic analysis and the absence of marine Pretiglian in the area. A dinoflagellate study of the Grobbendonk clay compares the stratigraphic position of the clay to the Waltonian, Pre-Ludhamian, Ludhamian regional stages of the U.K. Because of the cold climate during the deposition a Pre-Ludhamian formation time is preferred. This Pre-Ludhamian in the U.K. is correlated with the Reuver C or with the Praetiglian regional stages in the Netherlands.

Do the relationships between testate amoebae and fungi reflect the variability of past water table fluctuations in the ombrotrophic peatlands of Central Europe?

The Holocene ◽  
2020 ◽  
Vol 30 (8) ◽  
pp. 1186-1195
Author(s):  
Piotr Kołaczek ◽  
Monika Karpińska-Kołaczek ◽  
Mariusz Gałka ◽  
Grażyna Miotk-Szpiganowicz ◽  
Milena Obremska ◽  
...  
Keyword(s):  
Central Europe ◽  
Water Table ◽  
Pollen Analysis ◽  
Calluna Vulgaris ◽  
Testate Amoebae ◽  
Cold Climate ◽  
Testate Amoeba ◽  
Additional Information ◽  
Sphagnum Peat ◽  
Climate Events

In this article, we examined the indicative value of a relationship between two non-pollen palynomorphs (NPPs), fungal HdV-10, related to the presence of Calluna vulgaris, and HdV-31A, which is testate amoeba – Archerella flavum. Both are frequently present on slides designated for pollen analysis, prepared from Sphagnum peat. We analysed three profiles from three extensive ombrotrophic peatlands in northern Poland, in which the content of testate amoebae (TA) was examined and TA-inferred depth to the water table (DWT) was reconstructed. The new analysis of palynological samples regarding NPPs revealed that strong increases in HdV-10 content were mostly simultaneous to HdV-31A declines. However, the relations between both types were not statistically significant. The rapid increases in HdV-10, despite the fact that this type of conidiospores is related to drier habitats on peatlands, were tentatively interpreted as an indicator of rapid rises in the water table level which, in consequence, might have stimulated the production of these spores by fungi. In addition, a negative correlation between HdV-31A and Arcella discoides and positive one, but weaker, in case of HdV-10 (attributed by some authors to species Trichocladium opacum (Corda) S Hughes) and A. discoides show a link between mutual fluctuations of both NPPs and hydrological instabilities on peatland. The Bagno Kusowo bog, the westernmost peatland subjected to the study, displayed an intriguing agreement between the presence of peat sections with strong increases in HdV-10 and cold climate events affecting Europe. Our study reveals that counting even a limited number of NPP types during the standard pollen analysis of Sphagnum peat may support the interpretation of results, especially, in cases when the investigation lacks testate amoeba analysis. When the reconstruction of TA-inferred DWT is provided, it may introduce additional information about the patterns of hydrological dynamics.

scholarly journals Upper Holocene development of vegetation and radiocarbon dating in the vicinity of the Cerhovka Brook (Bohemian-Moravian Uplands, Czech Republic)

2012 ◽  
Vol 39 (4) ◽  
pp. 252-261 ◽  
Author(s):  
Eva Břízová ◽  
Anna Pazdur ◽  
Natalia Piotrowska
Keyword(s):  
Czech Republic ◽  
Pollen Analysis ◽  
Radiocarbon Dating ◽  
Deciduous Forests ◽  
Peat Bog ◽  
The Holocene ◽  
Lime Tree ◽  
Stratigraphic Position ◽  
Palynological Study ◽  
Pollen Analyses

Abstract The paper reports the results of a palynological study of a newly exposed section in the peat sediments of Bezděkov site and its correlation with the previous palaeobotanical studies. The main goal was to elucidate the stratigraphic position and paleogeographic development of fossil peat bog and its environment in the Protected Landscape Area Žďárské vrchy and Železné hory in the Bohemian-Moravian Uplands. The development of peatbog vegetation, as shown by the pollen analysis and radiocarbon dating, took place in the Holocene. Pollen analyses provide evidence for occurrences of wetland assemblages with huge representation of alder wood in all the part of succession, followed by willow near the Cerhovka Brook. Alnus and Abies were the dominant trees during all the time. The deciduous forests consist of elm (Ulmus), oak (Quercus), lime tree (Tilia), maple (Acer) and hazel (Corylus). The mosaic picture of woodland and wetland, which covered this landscape during the Upper Holocene, contrasts with the present day monotonous open lowland. Sediments of the peat bog provide information on the origin and vegetation evolution of this area.

scholarly journals Towards an improved lithostratigraphic subdivision of the Chalk Group in the Netherlands North Sea area - A seismic stratigraphic approach

2007 ◽  
Vol 86 (2) ◽  
pp. 131-143 ◽  
Author(s):  
A.S. van der Molen ◽  
Th.E. Wong
Keyword(s):  
The Netherlands ◽  
North Sea ◽  
Well Log ◽  
Seismic Sequence ◽  
Stratigraphic Analysis ◽  
Lithostratigraphic Units ◽  
Sequence Boundaries ◽  
Sea Area ◽  
2D And 3D ◽  
Stratigraphic Sequences

AbstractIn the Netherlands North Sea area, the Chalk Group has thus far been subdivided into the Cenomanian Texel Formation, the Turonian to Maastrichtian Ommelanden Formation and the Danian Ekofisk Formation. This paper describes the attempt to arrive at a more detailed lithostratigraphic subdivision for this area, particularly of the Ommelanden Formation. To this end, a seismic stratigraphic analysis was carried out on a regional 2D and 3D seismic dataset. The Chalk Group was subdivided into eleven seismic stratigraphic sequences, named CK1 through CK11, based on the mapping and correlation of unconformities. The identified seismic sequence boundaries were used as the main chronostratigraphic markers in the Chalk Group interval. The seismic dataset was subsequently expanded with well log data of 45 boreholes. These were tied to the seismic dataset by constructing a synthetic seismogram for each borehole, after which the seismic sequence boundaries were noted and correlated on the logs. Finally, micropaleonthological data available in 15 boreholes were used to date the seismic sequences. The sequences were interpreted to be of Cenomanian (CK1), Turonian (CK2), Coniacian (CK3), Santonian (CK4), Early Campanian (CK5; CK6), Middle to Late Campanian (CK7), Early Maastrichtian (CK8; CK9), Late Maastrichtian (CK10) and Danian (CK11) age. The seismic units recognised in this study were compared with formal lithostratigraphic units defined in the Chalk Group in the surrounding North Sea sectors. Based on this comparison, a revision of the formal lithostratigraphic scheme, recognising Tor Formation and Herring Formation equivalents, is suggested for the Netherlands North Sea area.

scholarly journals Comment on ‘The geometry and stratigraphic position of the Maassluis Formation (western Netherlands and south-eastern North Sea)’ by Jansen et al. (2004b)

2005 ◽  
Vol 84 (1) ◽  
pp. 51-52 ◽  
Author(s):  
F.P. Wesselingh ◽  
T. Meijer ◽  
P. Cleveringa
Keyword(s):  
The Netherlands ◽  
North Sea ◽  
Sr Isotope ◽  
Netherlands Journal ◽  
South Eastern ◽  
Stratigraphic Position ◽  
Combination Of Methods ◽  
Sequence Boundaries ◽  
Isotope Measurements ◽  
Age Estimates

Two papers (Jansen et al., 2004a, b) in the Netherlands Journal of Geosciences deal with the age and geometry of the Maassluis Formation of the Netherlands. Age estimates are derived mainly from strontium (Sr) isotope measurements (Jansen et al., 2004a). Based on a combination of methods, but most heavily relying on Sr data and sequence boundaries ages based on the Haq curve, the authors (in Jansen et al., 2004b) discuss the possible occurrence of hiatuses in the Maassluis Formation covering intervals of 0.04 to 0.18 Ma.

Ceramic Profiles in the Western Mound at Awatovi, Northeastern Arizona

1959 ◽  
Vol 25 (2) ◽  
pp. 184-202 ◽  
Author(s):  
Robert F. Burgh
Keyword(s):  
The Other ◽  
Numerical Comparison ◽  
Stratigraphic Analysis ◽  
Relative Chronology ◽  
Stratigraphic Position ◽  
Painted Pottery ◽  
Different Levels ◽  
Ceramic Studies

AbstractExcavations in the Western Mound at this prehistoric Hopi pueblo provide 13 adjacent columns of refuse in masonry rooms which yielded 21,569 painted sherds. Stratigraphic analysis of these ceramic profiles has resulted in a relative chronology of five color classes of locally made painted pottery which will serve as a control for future ceramic studies at the site. Black-onwhite, black-on-orange, and orange-paste polychrome were made from about A.r>. 1200 to 1300 when they were abruptly replaced by black-on-yellow and yellow-paste polychrome. The differences between trash deposited in rooms and that dumped in the open, the anomalies of sherd and vessel quantities, and the well documented nature of this large sherd collection make possible observations on the problems of stratigraphic interpretation. Numerical comparison of painted sherds with vessels restored from them demonstrates the hazards of interpretation based solely on limited sherd samples. The fact that one of the rooms produced a sequence exactly the reverse of the situation in the other 12 rooms emphasizes the need for more extensive testing in room blocks than in trash dumps. Restoration of vessels from sherds found at different levels in different rooms shows the inadequacy of chronological inference based on stratigraphic position of unassembled sherds.

scholarly journals Introduction

2021 ◽  
Vol 8 (2) ◽  
pp. 17-21
Author(s):  
Mary Gobbi
Keyword(s):  
The Netherlands ◽  
Workplace Learning ◽  
Regional Analysis ◽  
Work Force ◽  
Global Perspective ◽  
The Other ◽  
Different Types ◽  
Scientific Technical ◽  
The One ◽  
Over Time

When analysing the four papers that comprise this edition of the Journal, there were some quite similar themes, albeit with different perspectives. Essentially, the papers are considering different types of competences, their evolution over time, and the future needs of the work force in specific disciplines. What is fascinating is the emergence of a discourse of competences that is paradoxically extending and becoming more sophisticated on the one hand, yet on the other is confused, locally situated and difficult to define. We find competences being described as global, generic, scientific, technical, and associated with workplace learning. The geography of the papers provides a hierarchy of analysis from an international and global perspective to a sub-regional analysis of five countries (Europe), country based (Chile) and programme specific (The Netherlands).

The role of cultural and economic determinants in mortality decline in the Netherlands, 1875/1879–1920/1924: a regional analysis

2001 ◽  
Vol 53 (11) ◽  
pp. 1439-1453 ◽  
Author(s):  
J.H Wolleswinkel-van den Bosch ◽  
F.W.A van Poppel ◽  
C.W.N Looman ◽  
J.P Mackenbach
Keyword(s):  
The Netherlands ◽  
Regional Analysis ◽  
Mortality Decline ◽  
Economic Determinants

Characterizing spatially variable hydraulic properties of a boulder clay deposit in the Netherlands

Geoderma ◽  
1989 ◽  
Vol 45 (1) ◽  
pp. 19-29 ◽  
Author(s):  
J. Bouma ◽  
A.G. Jongmans ◽  
A. Stein ◽  
G. Peek
Keyword(s):  
The Netherlands ◽  
Hydraulic Properties ◽  
Clay Deposit ◽  
Boulder Clay
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