Malacological Study of the Momuna (Iguape, Brazil) Shell-middens and their paleoenvironmental significance

Authors

  • Roberto Barbosa Rodrigues Universidade de Guarulhos; Centro de Pós-graduação Pesquisa e Extensão
  • Kenitiro Suguio Universidade de São Paulo; Instituto de Geociências; Departamento de Geologia Sedimentar e Ambiental
  • Alethéa Ernandes Martins Sallun Secretaria do Meio Ambiente do Estado de São Paulo; Instituto Geológico
  • Luiz Ricardo Lopes de Simone Universidade de São Paulo; Museu de Zoologia

DOI:

https://doi.org/10.5327/Z1519-874X2011000100008

Keywords:

Shell-middens, Lagoon expansion, Relative Sea-Level (RSL)

Abstract

The shell-middens present in the Iguape (São Paulo State) coastal plain are situated at different distances from the present shoreline. In general, the more external shell-middens, which show a dominance of Anomalocardia brasiliana shells, give younger ages than the more internal shell-middens, which correspond to the Holocene most important lagoon expansion occurred between 5 and 6 ky B.P., and are commonly composed of Crassostrea brasiliana shells. Moreover, it was observed that the δ13C(PDB) ratios of the shells change according to the geographic location of the shell-middens, as a function of RSL (Relative Sea-Level) fluctuations with time. In this paper, the malacofauna of the shell-middens of the Momuna 1 and 2, both located at the homonymous village (Iguape, São Paulo State, Brazil), on the Cananeia Formation (120 ky B.P.), was studied.

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Published

2011-04-01

Issue

Vol. 11 No. 1 (2011)

Section

Articles

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How to Cite

Rodrigues, R. B., Suguio, K., Sallun, A. E. M., & Simone, L. R. L. de. (2011). Malacological Study of the Momuna (Iguape, Brazil) Shell-middens and their paleoenvironmental significance . Geologia USP. Série Científica, 11(1), 137-147. https://doi.org/10.5327/Z1519-874X2011000100008