Code
ORBUL
Status
Informal (Van Adrichem Boogaert & Kouwe 1994).
Lithological description
White to reddish sandstones and red to red-brown and grey claystones and siltstones. Some disseminated anhydrite occurs.
Depositional setting
Fluvial setting.
Definition of lower boundary
Overlies the Patch Formation conformably.
Definition of upper boundary
Base of the Rhyolite Member.
Thickness indication
About 400 m.
Geographical distribution
Used where the Rhyolite Member is identified.
Regional correlation
UK: Buchan Formation; GER: unknown; BEL: unknown.
Age
Frasnian.
Type section
Well:
Not yet determined.
Depth (thickness) AH:
Not yet determined.
Origin of name
Named after the British offshore Buchan Field in the UK block 21/1, where these sandstones constitute the principal hydrocarbon reservoir.
Previous name(s)
None.
Reviewed by (date)
Geert-Jan Vis (2019).
References
Van Adrichem Boogaert, H.A. & Kouwe, W.F.P. 1994. Stratigraphic nomenclature of The Netherlands; revision and update by RGD and NOGEPA, Section B, Devonian and Dinantian. Mededelingen Rijks Geologische Dienst, 50, 1-20.
Cite as
TNO-GDN ([YEAR]). lower Buchan member. In: Stratigraphic Nomenclature of the Netherlands, TNO – Geological Survey of the Netherlands. Accessed on [DATE] from http://acc.dinoloket.nl/en/stratigraphic-nomenclature/lower-buchan-member.