Two toposequences on the coastal plain of Rio Guaratuba (SP) were studied to define the pedological and deposition/storage evolution by means of macromorphological soil analysis. The first sequence shows the change of a Podzol into organic soil on marine sandy sediments, whereas the second one shows the relationship of a Gley Soil on continental sediments with a Podzol soil on marine sediments. Marine sedimentation was found to form sandbanks with internal depression zones, which allowed the development of a Podzol in the highlands and Organosol on the lowlands. Isolated hills of the anterior coastline have acted as physical barriers to the marine sandbanks, thus limiting continental sedimentation; the drainage system was cut along the contact zone, suggesting that the marine deposits have preceded the continental deposits.
genesis; toposequence; Serra do Mar; gleissolo; espodossolo; organossolo