The Early Cambrian Mianyang-Changning Intracratonic Sag and Its Control on Petroleum Accumulation in the Sichuan Basin, China

Figure 4

2D seismic profile across eastern margin of the Mianyang-Changning intracratonic sag. D-D′: SE-striking Langzhong section in northern segment of the sag; E-E′: SE-striking Hejiang section in southern segment. It should be noted that there is a distinct decrease in the steepness of the eastern boundary from the north to the south.