Late quaternary evolution and shallow gas formation in a tropical estuarine environment: the case of the Bertioga channel, Brazil

Genesis of submerged sandstones in Paraná State continental shelf, Southern Brazil, based on cementation patterns, ages and stable isotopes

“…344 km north from the study area, Felix and Mahiques (2013) have identified shallow gas formations both on Holocene sediments, which are currently under formation process, and on buried Pleistocene fluvial floodplains. Pockmarks and gas seeps have also been identified in their study, the latter occurring when the sedimentary package is less cohesive, i.e.…”