Early Paleozoic Extension-Compression Transition and Formation of a Paleo-Oil Reservoir System in the NW Sichuan Basin: Implications for Deeply Buried Hydrocarbon Accumulation

Figure 8

Stratigraphic contact of the southern-middle-northern Tianjingshan Paleouplift (TJS PU). Among them, a wide range of Middle Cambrian-Silurian strata is missing, which is mainly in the southern and middle TJS PU. The siliceous conglomerate at the top of the Changjianggou Fm is an unconformable contact with the overlying Devonian Pingyipu Fm, which has a hiatus in time of 110 Ma.