RT Journal Article
T1 Lithofacies and Sediment Sequences of a Microtidal, Wave-Dominated Tropical Estuary in Somone Lagoon (Senegal, West Africa)
A1 Youm, Cheikh Ibrahima
A1 Gueye, Adama
A1 García Villalba, Elena
A1 Doumbouya, Mbemba F.
A1 Sow, Ibrahima-Sory
A1 Sow, Elhadji
A1 Morales González, Juan Antonio
AB Estuary sedimentary sequences have been the focus of several papers in the last decades;however, the majority these papers were centered in mesotidal and macrotidal estuaries of themiddle latitudes. This present paper studies, from a sedimentological point of view, the infilling ofa microtidal, wave-dominated tropical estuary, where wide tidal flats, mangroves and sabkhas aredeveloped. Somone Lagoon is a Senegalese protected environment, very rich from an ecologicalpoint of view and with a definitive touristic vocation. For this work, 14 piston cores were studied.Additionally, the grain size, calcium carbonate and organic matter contents of 61 sediment samplesvertically distributed in these cores were analyzed. The distribution of facies and the verticalsequences of sediments show the influence of the tropical seasonal fluctuations of fluvial sedimentsupply and evaporation processes. A high degree of bioturbation and an elevated organic contentcan be interpreted as the result of a high capacity of retention of the organic material into the estuaryinfluenced by the weak tidal currents typical of a microtidal regime. These processes, acting sincethe last Holocene invasion of sea level, caused an advanced state of infilling of this estuarine systemwhere both flood tidal deltas and bay head deltas prograde above the fine facies of the central domainof the estuary.
PB MDPI
SN 2673-964X (electrónico)
YR 2024
FD 2024-04
LK https://hdl.handle.net/10272/23486
UL https://hdl.handle.net/10272/23486
LA eng
NO Youm, C. I., Gueye, A., García-Villalba, E., Doumbouya, M. F., Sow, I.-S., Sow, E., & Morales, J. A. (2024). Lithofacies and Sediment Sequences of a Microtidal, Wave-Dominated Tropical Estuary in Somone Lagoon (Senegal, West Africa). In Coasts (Vol. 4, Issue 2, pp. 306–322). MDPI AG. https://doi.org/10.3390/coasts4020016
NO This research was funded by the Direction of Geology of the Ministry of Mines and Geology. Republic of Senegal, Project: Inventory, Evaluation and valorization of geosites throughout the territory of Senegal. Project number C_P2-MMG_059.
DS Repositorio Institucional de la Universidad de Huelva
RD 1 jun 2026