Figure 6.

Sea level changes before and during South Atlantic coastal plain formation. Approximate paleogeographic reconstruction of sea level, based on reports in the literature and plotted on current data of altitude and bathymetry. The white circles identify the position of the current Calibrachoa heterophylla populations studied in this work. a) Maximum transgressive event which led to the formation of Barrier–Lagoon System I, Middle Pleistocene, 0.4 Myr ago, 21 m above current sea level [45]. b) The Pleistocene-Holocene transition, 11.7 Kyr ago, 70 m below current sea level [51]. The Patos and Mirim Lagoons are not shown because there are no accurate data about their conformation in this period.