Abstract
Two types of carbonate facies have been identified in the Sinemurian series of the western margin of the Southeast Basin, and attributed to successive depositional settings of carbonate sedimentation. The first setting is a low-angle and low-energy shallow marine carbonate platform. The second setting indicates a high-energy carbonate ramp. This dramatic change in depositional conditions occurs in a regional context of extension, and can be attributed to localised fault activity resulting in differential subsidence. The combined effect of these two processes gradually modified the platform topography and initiated the changes observed in the depositional profiles.
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