Detfurth Formation

Code
RBMD
Status
Formal (Van Adrichem Boogaert & Kouwe 1994).
Lithologische beschrijving

Sandstone-claystone couplet, grading laterally into massive sandstones in the basin-fringe area. The sandstone is light in colour and with large amounts of quartz. The claystone is red-brown.

Afzettingsmilieu

Fluvial (Geluk 2005).

Definitie ondergrens

Placed at the base of the sandstone, which forms a subtle unconformity, especially recognisable on the flanks of the Triassic highs. In the fringe area this sandstone is distinguished from the underlying Volpriehausen Formation by lower gamma-ray readings and a lower acoustic velocities.

Definitie bovengrens

Placed at the base of the first sandstone bed of the Hardegsen Formation or, near the swells, at the base of the unconformably overlying Solling Formation of the Upper Germanic Trias Group. In the basin-fringe area, this boundary is placed at the top of the uppermost of the claystone beds that occur in the upper part of the formation.

Dikte indicatie
Considerable variation: 60 - 100 m in the Dutch Central Graben, 50 - 80 m in the Ems Low and 20 - 40 m in the West Netherlands Basin, Roer Valley Graben and Broad Fourteens Basin.
Geografische verbreiding
Regionale correlatie
UK: Bunter Sandstone Formation; GER: Detfurth Formation; BEL: Detfurth Formation.
Ouderdom
Olenekian.
Holostratotype
Well:
Depth (thickness) AH:
4009 - 4048 m (39 m)
Parastratotype
Well:
Depth (thickness) AH:
2748 - 2807 m (59 m)
Parastratotype
Well:
Depth (thickness) AH:
1401 - 1427 m (26 m)
Parastratotype
Well:
Depth (thickness) AH:
2553 - 2589 m (36 m)
Oorsprong naam
New formation name, derived from the German stratigraphic nomenclature.
Vorige benaming(en)
It comprises the former Detfurth Sandstone and Detfurth Claystone members and their equivalents in the Middle Bunter Formation as defined by NAM and RGD (1980).
Gereviewed door (datum)
Johan ten Veen (2017).
Referenties
Geluk, M.C. 2005. Stratigraphy and tectonics of Permo-Triassic basins in the Netherlands and surrounding areas. PhD Thesis, Utrecht University, 171 p.
NAM & RGD 1980. Stratigraphic nomenclature of The Netherlands. Verhandelingen van het Koninklijk Nederlands Geologisch Mijnbouwkundig Genootschap 32, 77 p.
Van Adrichem Boogaert, H.A. & Kouwe, W.F.P. 1994. Stratigraphic nomenclature of The Netherlands; revision and update by RGD and NOGEPA, Section E, Triassic. Mededelingen Rijks Geologische Dienst, 50, 1-28.
Cite as
TNO-GDN ([YEAR]). Detfurth Formation. In: Stratigraphic Nomenclature of the Netherlands, TNO – Geological Survey of the Netherlands. Accessed on [DATE] from http://acc.dinoloket.nl/en/stratigraphic-nomenclature/detfurth-formation.