[[:file:petroleum-systems_fig3-12.png|Figure 1]] shows the Ellesmerian(!) petroleum system geographic extent. The limit is determined by the extent of the contiguous active source rock and the related petroleum accumulations. | [[:file:petroleum-systems_fig3-12.png|Figure 1]] shows the Ellesmerian(!) petroleum system geographic extent. The limit is determined by the extent of the contiguous active source rock and the related petroleum accumulations. |