Resumo

MARTINEZ-CLAVIJO, Santiago et al. Geomorphological units and distribution of sedimentary facies in the Alburquerque Key Island, Seaflower Biosphere Reserve, Colombian Caribbean. Bol. geol. [online]. 2021, vol.43, n.3, pp.143-164.  Epub 02-Abr-2022. ISSN 0120-0283.  https://doi.org/10.18273/revbol.v43n2-2021007.

Geomorphological units were characterized by remote sensing techniques (satellite images and acoustic) and the distribution of sedimentary facies was validated with in situ data in Albuquerque Key Island as a contribution to the knowledge of the Seaflower Biosphere Reserve. The Key Island presents the typical atoll geomorphology with Low reefs, Lagoon basin, Lagoon terrace, Prereef terrace, Slope, and Peripheral reef, which presents an approximate extension of 6 km; these reefs are impacted by the strong waves originated by the northeast trade winds. Ten sedimentary facies of biolithic and bioclastic composition of coral formations and the atoll volcanic base were established, with a heterogeneous distribution. This study provides a baseline for understanding the dynamics of sediment transport and deposition on reef platforms.

Palavras-chave : Sediment distribution; Geomorphology; Sedimentary facies; Colombian Caribbean; Remote sensing.

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