Abstract

FRANCO ARIAS, D.A.; RESTREPO LOPEZ, J.C.; SANABRIA RUIZ, N.Y  and  GUTIERREZ, J.C.. CHARACTERIZATION AND DISTRIBUTION OF SEDIMENTARY FACIES OF CARTAGENA BAY, COLOMBIA.. bol.geol. [online]. 2013, vol.35, n.1, pp.43-53. ISSN 0120-0283.

In the sedimentological analysis of 253 sediment samples from the edges and the bottom of the Cartagena bay, we identified 26 sedimentary facies. Samples were taken with Van Veen dredge for the bottom sediment Beeker multisampler and test pits for shorelines. Using the Bernard calcimeter we carried out the calcium carbonate (CaCO₃) analysis in every sieved sample. Sediments were classified according to the average grain size and content of CaCO₃, to define the existing sedimentary facies, where mud litoclast facies was the most representative and distributed to the north and south of the Tierra Bomba in the internal and external bay. We found that during the past 30 years the distribution of sedimentary facies has experienced significant changes: in the inner bay the content of CaCO₃ has decreased and in the southwest the grain size and content of CaCO₃ have decreased, as a result of the sediments contribution from Canal del Dique and present oceanographic conditions. These hydrodynamic conditions contribute to the weathering and erosion of coral formations present in the Colombian Caribbean

Keywords : Sediment; Facies; Cartagena bay; Colombian Caribbean.

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