Oosterdok Bed

NUDRUIOO

Formal (Bakker et al. 2003).

(Dark) grey to (dark) brown silty clay (varved, calcareous, stiff), with local laminae of very fine to medium, calcareous sand. Local glauconite, shells and dropstones. Slump structures and loadcasts.

Glaciolacustrine (ice-proximal to ice-distal, with turbidity currents (Jelgersma & Breeuwer 1975).

Generally sharp contact with mostly gravelly fluvial sand.

Gradual transition into non-varved clay (Uitdam Member, undifferentiated).

Less than 60 m.

Glacial basins in the central Netherlands.

North Sea: part of Cleaver Bank Formation (defined and mapped in conjunction with the British Geological Survey; Laban 1995); UK: part of Wolston Glacigenic Formation (McMillan et al. 2011); GER?; BEL: not present.

late Middle Pleistocene (Late Saalian).

Named after a borough in the east of Amsterdam.

None.

Wim Dubelaar (2018), Sytze van Heteren (2019).

Bakker, M.A.J., Den Otter, C. Weerts, H.J.T. 2003. Beschrijving lithostratigrafische eenheid. Nederlands Instituut voor Toegepaste Geowetenschappen TNO. Utrecht.

De Gans, W., De Groot, Th., Zwaan, H. 1987. The Amsterdam basin, a case study of a glacial basin in The Netherlands. In: Van der Meer, J.J.M. (ed.): Tills and Glaciotectonics, 205-216.

Jelgersma, S., Breeuwer, J.B. 1975. Toelichting bij de kaart Glaciale Verschijnselen gedurende het Saalien, 1:600.000. In: Zagwijn, W.H., Van Staalduinen, C.J. (eds.): Toelichting bij de Geologische Overzichtskaarten van Nederland. Rijks Geologische Dienst, Haarlem.

Laban, C. 1995. The Pleistocene glaciations in the Dutch sector of the North Sea. A synthesis of sedimentary and seismic data. PhD Thesis, University of Amsterdam, 194 p.

McMillan, A.A., Hamblin, R.J.O., Merritt, J.W. 2011. A lithostratigraphical framework for onshore Quaternary and Neogene (Tertiary) superficial deposits of Great Britain and the Isle of Man. British Geological Survey Research Report, RR/10/03, 343 p.