Drachten Formation

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.
Middle Pleistocene (Bantega and Hoogeveen interstadial periods (Zagwijn 1973)).
Het Zuid (excavation in Drachten)
Depth (thickness) AH:
4.70 - 10.30 m (5.6 m) below land surface
See references in Bosch (2011).
Depth (thickness) AH:
5.86 - 16.42 m (10.56 m) below land surface
BL170151 (X-Y: 610940, 5884389 (WGS84))
Depth (thickness) AH:
3.00 -10.00 m (7.00 m) below sea bed
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).
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 http://www.dinoloket.nl/en/stratigraphic-nomenclature/drachten-formation.