Changes

==Geological setting==

==Geological setting==

[[file:oiloil-and-oilsource-rock-correlations_fig8-53.png|thumb|{{figure number|1}}.]]

[[file:oiloil-and-oilsource-rock-correlations_fig8-53.png|300px|thumb|{{figure number|1}}stratigraphic section of the West Siberian basin.]]

The West Siberian basin, located in central Russia, is approximately bisected north–south by the Ob River. T[[:file:oiloil-and-oilsource-rock-correlations_fig8-53.png|Figure 1]] is a stratigraphic section of the basin. Oils are reservoired throughout the section but are concentrated in the Lower Cretaceous and Upper Jurassic.

The West Siberian basin, located in central Russia, is approximately bisected north–south by the Ob River. [[:file:oiloil-and-oilsource-rock-correlations_fig8-53.png|Figure 1]] is a stratigraphic section of the basin. Oils are reservoired throughout the section but are concentrated in the Lower Cretaceous and Upper Jurassic.

==Correlation process==

==Correlation process==