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Biostatigraphy of Calcareous Nannofossils in Limestone from Boyong a Section of Tonasa Formation, Jeneponto Regency, South Sulawesi

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Abstract:

This research was conducted in the Boyong area, Jeneponto, South Sulawesi, Indonesia. The study focused on the biostratigraphy of calcareous nannofossils in the Tonasa Formation, specifically analyzing the Boyong A limestone section. Samples were collected using the measured stratigraphy method and then examined using the smear slide technique. Based on the analysis, three nannofossil datum markers were identified: LO Coccolithus Formosus, FO Sphenolithus distentus, and LO Zygrhablithus bijugatus. The zone boundaries were determined based on calcareous nannofossils: NP.21/CP.16a zone, NP.22/CP.16c zone, and NP.25/CP19b zone. Therefore, the age of the Tonasa Formation in the Boyong A section of Jeneponto is from the Early Oligocene to Late Oligocene.

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Periodical:

Engineering Headway (Volume 39)

Pages:

121-129

DOI:

https://doi.org/10.4028/p-Me1MX8

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Online since:

July 2026

Authors:

Monica Triskia Lewakabessy*, Meutia Farida, M. Fauzi Arifin

Keywords:

Biostratigraphy, Limestone, Nannofossils, Oligocene, Tonasa Formation

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© 2026 Trans Tech Publications Ltd. All Rights Reserved

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