Code
ROSLA
Status
Informal (RGD 1993).
Lithological description
Light grey sandstone. The moderately rounded grains of the sandstones vary in grainsize from coarse to fine.
Depositional setting
Fluvial and aeolian (?).
Definition of lower boundary
The contact with the underlying Ten Boer Claystone is very sharp.
Definition of upper boundary
Sharp contact with the Zechstein Group.
Thickness indication
7 m (in well VLR-01)
Geographical distribution
Locally, in central Friesland and northeastern Drenthe, . The member only occurs locally in the northeast of the map sheet area. Towards the north, the east and the west this member pinches out completely.
Regional correlation
UK: not present; GER: not present; BEL: not present.
Age
Wuchiapingian.
Type section
Well:
Not yet determined.
Depth (thickness) AH:
Not yet determined.
Origin of name
Named after the village of Akkrum in the province of Friesland.
Previous name(s)
None.
Reviewed by (date)
Geert-Jan Vis (2019).
References
RGD 1993. Geological Atlas of the Subsurface of The Netherlands, Explanation to map sheet V: Sneek-Zwolle, Geological Survey of The Netherlands RGD, Haarlem, 126 pp. https://www.nlog.nl/sites/default/files/explanation_kbv.pdf
Cite as
TNO-GDN ([YEAR]). Akkrum Sandstone member. In: Stratigraphic Nomenclature of the Netherlands, TNO – Geological Survey of the Netherlands. Accessed on [DATE] from http://acc.dinoloket.nl/en/stratigraphic-nomenclature/akkrum-sandstone-member.