Code
NUDN
Status
Formal (Bosch 2011).
Lithological description
Light grey to yellowish grey fine to medium sand, locally slightly silty, non-carbonaceous and non-micaceous. Subordinate humic sandy silt.
Depositional setting
Periglacial aeolian and locally fluvial, lacustrine.
Definition of lower boundary
Gradual transition into finer subglacial or ice-marginal sand (Peelo Formation) or coarser fluvial sand (Urk Formation, Tynje Member).
Definition of upper boundary
Sharp contact with till (Gieten Member, Drente Formation). Locally gradual transition into periglacial sand with glacial gravel (Boxtel Formation).
Thickness indication
Up to 15 m.
Geographical distribution
Offshore, local patches in the northern half of the Dutch North Sea.
Regional correlation
North Sea: Tea Kettle Hole Formation (defined and mapped in conjunction with the British Geological Survey; Laban 1995); UK: ?; GER: ?; BEL: not distinguished.
Age
Middle Pleistocene (Bantega and Hoogeveen interstadial periods (Zagwijn 1973)).
Holostratotype
Well:
Het Zuid (excavation in Drachten)
Depth (thickness) AH:
4.70 - 10.30 m (5.6 m) below land surface
Comments:
See references in Bosch (2011).
Parastratotype
Well:
Depth (thickness) AH:
5.86 - 16.42 m (10.56 m) below land surface
Hypostratotype
Well:
BL170151 (X-Y: 610940, 5884389 (WGS84))
Depth (thickness) AH:
3.00 -10.00 m (7.00 m) below sea bed
Comments:
Block L in the Dutch North Sea.
Origin of name
Named after the village of Drachten, in the northern Netherlands.
Previous name(s)
Eindhoven Formatie (Doppert et al. 1975). Offshore, Tea Kettle Hole Formation (Rijsdijk et al. 2005).
Reviewed by (date)
Wim Dubelaar (2018), Sytze van Heteren (2019).
References
Bosch, J.H.A. 2011. Beschrijving lithostratigrafische eenheid. Nederlands Instituut voor Toegepaste Geowetenschappen TNO. Utrecht.
Doppert, J.W.Chr., Ruegg, G.H.J., Van Staalduinen, C.J., Zagwijn, W.H., Zandstra, J.G. 1975. Formaties van het Kwartair en Boven-Tertiair in Nederland. In: Zagwijn, W.H., Van Staalduinen, C.J. (eds.): Toelichting bij geologische overzichtskaarten van Nederland. Rijks Geologische Dienst, Haarlem, 11-56.
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.
Rijsdijk, K.F., Passchier, S., Weerts, H.J.T., Laban, C., Van Leeuwen, R.J.W., Ebbing, J.H.J. 2005. Revised Upper Cenozoic stratigraphy of the Dutch sector of the North Sea Basin: towards an integrated lithostratigraphic, seismostratigraphic and allostratigraphic approach. Netherlands Journal of Geosciences 84, 129-146. https://doi.org/10.1017/S0016774600023015
Zagwijn, W.H. 1973. Pollenanalytic studies of Holsteinian and Saalian Beds in the Northern Netherlands, Mededelingen Rijks Geologische Dienst, Nieuwe Serie, 24, 139-156.
Cite as
TNO-GDN ([YEAR]). Drachten Formation. In: Stratigraphic Nomenclature of the Netherlands, TNO – Geological Survey of the Netherlands. Accessed on [DATE] from https://www.dinoloket.nl/en/stratigraphic-nomenclature/drachten-formation.