Plenus Marl Member

Code
CKTXP
Status
Formal (Van Adrichem Boogaert & Kouwe 1994).
Lithological description

Dark-grey, partly black, calcareous, laminated claystone.

Depositional setting

Represents an Oceanic Anoxic Event (OAE2), a world-wide sea-level highstand, coupled with a rise of the oxygen-minimum zone and large-scale organic carbon deposition and burial.

Definition of lower boundary

Can be distinguished from the underlying Texel Marlstone Member by its high clay content which causes a distinct kick on gamma-ray, acoustic and resistivity logs.

Definition of upper boundary

Can be distinguished from the overlying Ommelanden Formation by its high clay content which causes a distinct kick on gamma-ray, acoustic and resistivity logs.

Thickness indication
Generally does not exceed 10 m.
Geographical distribution
<see map>
Regional correlation
UK: Plenus Marls Member; GER: ?; BEL: ?
Age
Cenomanian - Turonian boundary.
Holostratotype
Depth (thickness) AH:
2324 - 2326 m (2 m)
Parastratotype
Depth (thickness) AH:
1081 - 1084 m (3 m)
Origin of name
Named after comparable beds in the United Kingdom, kown as the 'Plenus Marl', characterized by the belemnite Actinocamax plenus.
Previous name(s)
Before 1994 (Van Adrichem Boogaert & Kouwe 1994) these deposits were included in the Texel Marlstone Member.
Reviewed by (date)
Mark Geluk, Geert-Jan Vis (2017).
References
Van Adrichem Boogaert, H.A. & Kouwe, W.F.P. 1994. Stratigraphic nomenclature of The Netherlands; revision and update by RGD and NOGEPA, Section H, Upper Cretaceous. Mededelingen Rijks Geologische Dienst, 50, 1-20.
Cite as
TNO-GDN ([YEAR]). Plenus Marl Member. In: Stratigraphic Nomenclature of the Netherlands, TNO – Geological Survey of the Netherlands. Accessed on [DATE] from http://www.dinoloket.nl/en/stratigraphic-nomenclature/plenus-marl-member.