JMAJMA

Petroleum System Events ChartPetroleum System Events Chart

1 2

400 300 200 100

Paleozoic Mesozoic Cenozoic

D M P P TR J K Pe N

Geologic Time-Scale

Petroleum System Events

Source Rock

Reservoir Rock

Seal Rock

Overburden

Trap FormationGeneration, Migration,and Accumulation

Preservation

Critical Moment1. Western North Slope2. East-central North Slope

Bird, 1994Bird, 1994

North Slope, AlaskaNorth Slope, Alaska