Table 1

The full suite of horizons incorporated in the 3D backstripped model, their assigned age and the lithological properties of the overlying stratigraphic interval

HorizonAge (Ma)Lithology (unit above)
% shale% sandstone% limestone
Present-day seabed0
Base Pliocene59352
Mid Oligocene28.59622
Base Eocene (T50)509622
Intra Paleocene (T30)5678202
Base Tertiary (K90)6578202
Intra-Campanian (K80)7772253
Mid-Coniacian (K72)8772253
Top Cenomanian (K66)959622
Top Lower Cretaceous (K54)1009622
Base Cretaceous1409622
Notional basement25050500