Sedimentary Record of Paleogene Sequences in the Penyu and Malay Basins, Offshore Peninsular Malaysia

The Eocene to Lower Oligocene deposits of the Penyu and Malay basins are formed by fluvial-lacustrine with marine influence in latter. sequence consists mainly siltstone, several intercalations fine-grained sand volcanic tuff. Based on well data, Mid-Upper sediments exist Basin deeper parts half grabens sub-basins. Hence, this implies age basin initiation at Mid-Eocene, rather than as traditionally commonly stated literature. By correlation, seismic evidences show, also appear deeper, undrilled Basin, again implying that latest, a Mid-Eocene initiation.In aprominent near-Base Unconformity can potentially be correlated Base-Tertiary adjacent however latter term all Tertiary sequences, including potential Paleogene above unconformity. Besides, we observe intra-Eocene unconformities, called Top N O. presence strata is likely associated an early phase extensional tectonism, probably related onset rifting South China Sea continental crust.