Bedset characterization within a wave-dominated shallow-marine succession: An evolutionary model related to sediment imbalances

The transgressive-regressive architecture of the Pilmatué bedsets, as well as the nature of the bounding surfaces indicate that their evolution could not be attributed to already reported controls, such as changes in storminess or high-frequency relative sea-level cycles. These attributes fit better with the concept of climatic variations impacting in the nature of accretion versus retrogradation. In that sense, resulting interpretations suggest that changes in the wave climate were the main controlling process on its evolution. In consideration of that, a feasible model related to along strike sediment supply imbalances and shoreline rotation phenomena, is proposed as the developer of intra-parasequence units at a mid-term scale (1 to 100 k.y.). The interpretations made, suggest that mid-term evolution of shallow-marine systems can be strongly controlled by changes in its transport own dynamics and the necessity of the system to heal sediment supply imbalances, which result in a complex sequence-stratigraphic architecture.