| Issue |
BIO Web Conf.
Volume 94, 2024
The 8th International Conference on Biological Sciences “Leveraging Biodiversity to Support Green Economy and Climate Resilience” (ICBS 2023)
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|---|---|---|
| Article Number | 04008 | |
| Number of page(s) | 6 | |
| Section | Biosystematics, Ecology, and Evolution | |
| DOI | https://doi.org/10.1051/bioconf/20249404008 | |
| Published online | 25 March 2024 | |
Nannofossil Diversity and Biostratigraphy of Kebo Butak Formation from Kalinampu Area, Bayat - Central Java
Laboratory of Paleontology, Geological Engineering Department, Faculty of Engineering, Universitas Gadjah Mada, Indonesia
* Corresponding author: akmaluddin@ugm.ac.id
The research location is part of the Kebo Butak Formation, where the outcrop is well-exposed in Kalinampu, Jarum Village, Bayat – Central Java. Nannofossil was prepared on 20 samples using gravity settling and observed under a light microscope with 1000x magnification. Nannofossil analysis of abundances and diversity in this area revealed 21 species and 7 genera. Biostratigraphic analysis showed that the Kebo Butak Formation in Kalinampu section can be divided into Furcatolithus predistentus Zone (CNO4/NP24), Sphenolithus ciperoensis Zone (CNO5/NP25), Shenolithus delphix Zone (CNO6/NP25) and Discoaster druggii Zone (CNM1/NN1). These results confirm that the Kebo Butak Formation age was deposited in a marine environment during the Late Oligocene (26.93 Ma) to Early Miocene (23.06 Ma).
© The Authors, published by EDP Sciences, 2024
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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