The '''stratigraphic extent''' of a petroleum system is the span of lithological units which encompasses the essential elements within the geographic extent of a petroleum system. The stratigraphic extent is from below the pod of active source rock or the petroleum of the discovered accumulations in the system, whichever is deeper, to the top of the overburden rock.The stratigraphic extent can be displayed on the burial history chart and cross section drawn at the critical moment. [[:file:petroleum-systems_fig3-5.png|Figure 3]] shows the stratigraphic extent of the fictitious Deer-Boar(.) petroleum system at the critical moment. | The '''stratigraphic extent''' of a petroleum system is the span of lithological units which encompasses the essential elements within the geographic extent of a petroleum system. The stratigraphic extent is from below the pod of active source rock or the petroleum of the discovered accumulations in the system, whichever is deeper, to the top of the overburden rock.The stratigraphic extent can be displayed on the burial history chart and cross section drawn at the critical moment. [[:file:petroleum-systems_fig3-5.png|Figure 3]] shows the stratigraphic extent of the fictitious Deer-Boar(.) petroleum system at the critical moment. |