Emmen Volcanic Formation

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

Sequence of variegated, red-brown to green, spilitic, basaltic volcanics and grey-brown to red-brown mudstones. In the type section a number of discrete lava flows can be distinguished as high sonic velocity and resistivity intervals with relatively high gamma ray readings. Other wells yield a more massive lava sequence, probably consisting of stacked flows.

Depositional setting

Various consecutive, basaltic lava flows, poured out into an area of sparse, ephemeral fluvial sedimentation under arid to semi-arid conditions.

Definition of lower boundary

Marked by the first occurrence of volcanic rocks, resting either disconformably on red or grey claystones and sandstones of the Limburg Group, or conformably on similar rocks of basal Rotliegend clastics. The latter situation has not yet been established in the Netherlands.

Definition of upper boundary

Placed at the top of the uppermost volcanic bed. In the Netherlands the formation is observed to be disconformably overlain by the basal beds of the Zechstein Group, but it is possible that in places it is overlain by red sandstones and mudstones belonging to the Upper Rotliegend Group, a situation similar to that in the adjacent area in Germany.

Thickness indication
Up to 66 m.
Geographical distribution
Regional correlation
UK: -; GER: ?; BEL: -.
Age
Artinskian.
Holostratotype
Depth (thickness) AH:
3935 - 4014 m (79 m)
Origin of name
Named after the town of Emmen in the east of the province of Drenthe.
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 D, Permian. Mededelingen Rijks Geologische Dienst, 50, 1-42.
Cite as
TNO-GDN ([YEAR]). Emmen Volcanic Formation. In: Stratigraphic Nomenclature of the Netherlands, TNO – Geological Survey of the Netherlands. Accessed on [DATE] from http://www.dinoloket.nl/en/stratigraphic-nomenclature/emmen-volcanic-formation.