[[:file:petroleum-systems_fig3-17.png|Figure 6]], an events chart for the Ellesmerian(!) petroleum system, indicates when its elements and processes occurred. The cross-hatched pattern shows the estimated time of the tilting of the Barrow Arch, which resulted in remigration of petroleum from older to younger (early Tertiary) reservoir rocks. | [[:file:petroleum-systems_fig3-17.png|Figure 6]], an events chart for the Ellesmerian(!) petroleum system, indicates when its elements and processes occurred. The cross-hatched pattern shows the estimated time of the tilting of the Barrow Arch, which resulted in remigration of petroleum from older to younger (early Tertiary) reservoir rocks. |