Abstract
The Accretional Beach Ridge System of Tongoy Bay: An Example of a Regressive Barrier Developed in the Semiarid Region of Chile
Highlights
Traditional costal barriers have been studied as characteristic features of drilling coasts, with a major territorial expression on the east coast of South and North America, Australia, South Africa, and Western Europe [1,2]
While there is no pale climatic data for validating the found morphological evidence, the works of Tamura [38] and Nielsen et al [39] area ratified, in regard to the importance of beach ridges as paleo environmental record [40,41,42,43,44]. Identified features such as beach ridge sequences with beach gravel, foredunes, and lagoons associated with local river outlets, together constitute morphological characteristic elements associated with the coastal barrier environment of Tongoy Bay
Riverbeds and riverbanks are outlet environments that correlate to the progradation of the barrier
Summary
Traditional costal barriers have been studied as characteristic features of drilling coasts, with a major territorial expression on the east coast of South and North America, Australia, South Africa, and Western Europe [1,2]. Costal barriers of Brazil are highlighted in South America, described by Dillenburg & Hesp [3], Hesp et al [4]. In Chile, these forms have been analyzed as coastlines formed by beach ridges [6,7]. We approach the subject from the conceptualization of the strandplain in coastal barriers on a continental subduction margin, as in the case of Chile. Regarding the systems to be described, the presence of beach ridges is an essential feature, and has been considered according to Otvos’definition [8], that is to say, there are a relict, semi parallel, multiple ridges forming a strandplain. Tamura (2012) indicates the relevance of beach ridges as a pale environmental record, which is of great significance for the analysis of Tongoy Bay
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