Boletín de Geología

Vol. 29 No. 2 (2007): Boletin de Geologia
Articles

DEPOSICIONAL ENVIRONMENTS AND BENTHONIC FORAMINIFERA FROM TUBARA FORMATION (PLIOCENE FROM LOWER MAGDALENA VALLEY)

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  • C. E Molinares,
  • J. I Martinez,
  • F Fiorini,,
  • C. Jaramillo
C. E Molinares
Universidad Eafit
J. I Martinez
Universidad Eafit
F Fiorini,
Smithsonian Tropical Research Institute
C. Jaramillo
Smithsonian Tropical Research Institute

How to Cite

Molinares, C. E., Martinez, J. I., Fiorini, F., & Jaramillo, C. (2007). DEPOSICIONAL ENVIRONMENTS AND BENTHONIC FORAMINIFERA FROM TUBARA FORMATION (PLIOCENE FROM LOWER MAGDALENA VALLEY). Boletín De Geología, 29(2). Retrieved from https://revistas.uis.edu.co/index.php/revistaboletindegeologia/article/view/431
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Abstract

The Tubara Formation in the arroyo Piedras Creek (169 m) is divided in three segments: The lower is interpreted as the result of siliciclastic sedimentation in an alluvial/deltaic plain; the intermediate as the result of sedimentation on a lagoon and/or coastal swamps, and the upper in the foreshore/bay - upper shoreface transition. The succession is dominated by the benthonic foraminifera assemblages Criboelphidium-Hanzawaia (CbHz) and Hanzawaia-Textularia-Criboelphidium (HzTCb) in the lower segment; Ammonia-Hanzawaia (AmHz) in the intermediate segment and Hanzawaia-Textularia-Quinqueloculina-Triloculina (HzQT) in the upper segment. The occurrence of the planktonic foraminifera taxa, Globigerinoides obliquus, Globigerinoides ruber and Truncorotalia aff crassaformis s.l. allows us to precise the age of the Tubara Formation as Early Pliocene.

 

Key works: Benthonic foraminifera, Tubara Formation, Paleoecology, Paleoenvironments. Lower Magdalena Valley.

 

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