Tang Formation (Tangformasjonen)
(From NPD Bulletin no. 4)
Rogaland Group
Name
From the Norwegian name for seaweed. The formation corresponds to the informal Bodø formation
(H5-1).
Well type section
Well 6407/6-1
(Statoil), coordinates 64°38'29.62"N, 07°52'31.53"E, from 1745 m to
1673 m (Fig. 35). No cores.
Thickness
72 m in the type well.
Lithology
Dark grey to brown claystone with minor sandstone and limestone.
Basal Stratotype
The base is defined by an increase in interval transit time on the
sonic log and a decrease in density and resistivity log readings.
Lateral extent and variation
The formation thins towards the northeast. It is not present on the Nordland Ridge.
Age
Danian to late Paleocene.
Depositional environment
The sediments were deposited in a deep marine environment.
