Depositional Architecture of a Pleistocene Coastal Barrier Revealed by Ground-Penetrating Radar on the Paraná Coast, Southern Brazil

These radargrams are supplementary materials referring to the article Depositional Architecture of a Pleistocene Coastal Barrier Revealed by Ground Penetrating Radar on the Paraná Coast, Southern Brazil.
The primary objective of this study is to provide a detailed characterization of the depositional architecture of a Pleistocene barrier segment located in the inland region of the Superagüi and Paranaguá strandplains. By distinguishing Barrier Systems II and III and delineating their boundary, this work contributes to a broader understanding of how coastal systems respond to sea-level fluctuations and climate change—key factors influencing coastal evolution globally.
The radarfacies and bounding surfaces show strong correspondence with the sedimentary facies identified in core samples and stratigraphic profiles from previous studies. In the Superagüi strandplain, four main depositional environments were interpreted based on radarfacies distribution and geometry: shoreface, foreshore, backbarrier, and aeolian dune fields. In the Paranaguá strandplain, two principal depositional environments were identified: shoreface and foreshore.
The first GPR transect was acquired across the Superagüi strandplain, within the domain of Barrier System III, and extends for approximately 2.6 km and displays continuous reflections down to a depth of ~7.5 m. A total of nine radarfacies (Rf1, Rf7, Rf8, Rf9, Rf10, Rf11, Rf12, Rf15, and Rf16) were identified along this transect. In the Paranaguá region, two GPR transects were acquired in the inner portion of the strandplain. Profiles 1 and 2 extend for 345 m and 500 m, respectively, along a NW–SE direction and display similar stratigraphic characteristics. Profile 1, located farther inland, reaches a depth of 6 m, with elevations ranging between +8 and +10 m MSL. Profile 2 covers elevations from +8 to +12 m MSL and also penetrates to 6 m depth. A total of 9 radarfacies were identified across both profiles (Rf2, Rf3, Rf4, Rf5, Rf9, Rf13, Rf14, Rf15 and Rf16).