MESOZOIC EVOLUTION OF GULF OF MEXICO: INTERACTION BETWEEN TECTONICS AND SEDIMENTATION
During the early stage of rifting and extension, Triassic syn-rift graben-fill red-beds of Eagle Mills Formation were deposited above pre-rift Paleozoic basement. This locally deposited sequence were designated as the oldest Mesozoic strata in the Basin. Marine transgression into the GoM during Middle Jurassic initiated the deposition of syn rift Werner Formation and Louann Salt. Basement topography influenced the differential thickness of the salt deposits over the basin as well as the distribution of Late Jurassic post rift deposits (Norphlet, Smackover, Haynesville Formations, and Cotton Valley Group). Late Jurassic post rift deposits represents a wide range of depositional environments, from shallow shelf to aeolian, indicating multiple local transgression-regression cycles of the sea. A major lowering of sea level in the GoM during the Lower Cretaceous exposed the shelf margin and an erosional event started. A transgression followed by this erosional episode in combination with the Laramide orogeny affected the Late Cretaceous depositions.