Title: The importance of foraminifera in providing paleoecologic and biostratigraphic information for a Miocene tropical carbonate system: Cicuco Field, NW Colombia
Abstract: This paper presents the results from foraminiferal analysis of cores composed of shallow-water carbonates, and associated siliciclastics collected from the Cicuco Field, NW Colombia. Larger benthic and planktonic foraminifera from cores C11, C20, C21and C22 are described. An integrated foraminiferal zonation offers new age determinations for the sections under study. The contemporaneous ranges of irregularly occurring but well-preserved planktonic foraminiferal assemblages and age diagnostic benthic foraminifera are used to establish the biostratigraphic intervals. Eight species of benthic foraminifera species are identified, including Amphistegina lessonii, Borelis melo melo, Cycloclypeus carpenteri, Lepidocyclina (Eulepidina) formosa, Miogypsina irregularis, Lepidocyclina (Nephrolepidina) sumatrensis, Lepidocyclina (Nephrolepidina) parva, and Operculina complanata, and 10 planktonic foraminifera species are identified, including Globigerinella aequilateralis, Globigerinoides bollii, Globoquadrina dehiscens, Globorotalia obesa, Globorotalia siakensis, Globigerinoides subquadratus, Orbulina bilobata, Orbulina suturalis, Orbulina universa, and Sphaeroidinellopsis seminulina seminulina. The age of the marine carbonate units in the cores is late-early to middle Miocene, according to benthic and planktonic foraminifera. This is the first detailed study to evaluate the biostratigraphy of these cores. Identification of foraminifera species provides valuable data useful for determination of depositional environments, water depths and conditions under which the Cicuco carbonate rocks were deposited. In addition, the resulting late-early to middle Miocene age refines previous ages and allows for evaluation of time-equivalent local, regional, and global factors that may have influenced deposition.
Publication Year: 2023
Publication Date: 2023-01-01
Language: en
Type: book-chapter
Indexed In: ['crossref']
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Cited By Count: 3
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