Vade Member / Vadeleddet
Vade is a giant from Norse mythology who wades across fjords.
Isaksen, D. & Tonstad, K. 1989. A revised Cretaceous and Tertiary lithostratigraphic
nomenclature for the Norwegian North Sea. NPD-Bulletin, No. 5, 59 pp.
The member consists of thinly interbedded, light green to grey, very
fine-grained sandstones and siltstones. These are glauconitic, slightly
micaceous and well sorted.
The member is 72 m thick in the type well
and 60 m in the reference well
The formation has only been recovered in blocks 2/2 and 2/3.
Interval of type section (m)
From 2172 m to 2100 m in the type well 2/2-1.
Interval of reference section (m)
From 1855 m to 1795 m in reference well 2/3-2.
Lower boundary (basal stratotype)
The lower boundary is recognized by a decrease in gamma-ray readings and an
increase in velocity from the claystones of the underlying
Lark Formation into the Vade Member.
Upper boundary (characteristics)
The upper boundary is characterized by an increase in gamma-ray response
and decrease in velocity from the Vade Member the claystones of the
The sandstones of the Vade Member were deposited in a shallow marine
environment. Their deposition can be seen as a response to an eustatic
fall in sea-level or tectonic uplift in the area. A source area in the
east or northeast was suggested by Isaksen & Tonstad (1989).