Should Anthropic Ridges Framed as Foredunes Be Considered Real Dunes?

Aeolian features framed as foredunes worldwide, whose classification faces challenges to separate wave-formed from aeolian ridges, are relevant the context of anthropic control. An example this kind morphology, previously classified foredunes, is arranged along Brazil’s northeastern coast, and pertinence its such or even truly developed dunes was examined. To contribute debate on issue, detailed geomorphological mapping carried out through UAV LIDAR surveys, in addition multitemporal study satellite images aerial photographs. Ground penetration radar sections, trenches, particle size analysis were also conducted. Although obliquity wind direction coastline, study’s main bedform focus shows coast-parallel positioning conditioned by exogenous vegetation inserted about 70 m high tide line. This morphology showed practically no migration for over 15 years; however, breaks barrier develops depositional lobes V-shaped low crests protruding into mainland. GPR sections reveal cross-strata sets with a dip angle only two sequences, one preceding introduction other contemporary layer, amidst dominance horizontal sub-horizontal strata. The sediments characteristically aeolian, resembling incipient protodunes few stretches at lee slope highlighting characteristics retention precipitation dunes. There little similarity compared occurrences equatorial northeast coast; there an inconsistency correlation between morphological stage. In addition, disconnection dynamics morphogenetic process differentiates it regional foredunes. therefore, presents aspects that not characteristic naturally formed region thus demands emphasize anthropogenic character.