Micropaleontological Analysis of Planktonic and Benthic Foraminifera from the Claystone Member of the Bayah Formation (Tebm) and the Limestone Member of the Cijengkol Formation (Tojl), Jatake Area, Lebak Regency, Banten Province

Salsabiila Fadhilah Ahmad, Dwi Vina Febrim, Harnani Harnani

Abstract


Micropaleontological analysis of planktonic and benthic foraminifera from three rock samples—muddy micrite, allochemic sandstone, and wackestone—was carried out to determine the relative age and depositional environment of the Claystone Member of the Bayah Formation (Tebm) and the Limestone Member of the Cijengkol Formation (Tojl) in the Jatake area, Lebak Regency, Banten Province, Indonesia. A total of 43 foraminiferal specimens were identified, including 28 planktonic and 15 benthic individuals. These were used for biostratigraphic and paleoenvironmental interpretation. The results show that the Claystone Member Tebm (RL19) dates to the Middle Eocene, mainly within planktonic foraminiferal biozones P14–P15, which falls under a wider P14–P17 range. In contrast, the Limestone Member Tojl is younger, with sample RL85 assigned to the Late Oligocene (N1–N3) and sample RL23 corresponding to the Late Oligocene to earliest Miocene interval (N3–N4). Benthic foraminiferal groups from all samples suggest deposition in outer neritic to upper bathyal environments. The estimated paleobathymetric ranges are about 390–1100 ft for RL19, 350 - 1630 ft for RL85, and 390 - 1230 ft for RL23. Even though the ages differ, the similarity in depositional environments hints at comparable marine bathymetric conditions in the study area. The differences in age suggest that the Bayah Formation and the Cijengkol Formation represent different depositional phases instead of a continuous stratigraphic sequence. This finding offers important insights into the stratigraphic framework and depositional evolution of the Bayah Dome region.

Keywords


Planktonic foraminifera; Benthic foraminifera; Biostratigraphy; Depositional environment; Bayah Formation.

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References


R. K. Olsson, C. Hemleben, W. A. Berggren, and B. T. Huber, “Atlas of Paleocene Planktonic Foraminifera,” 1999.

W. A. Berggren and K. G. Miller, “Paleogene tropical planktonic foraminiferal biostratigraphy and magnetobiochronology,” Micropaleontology, vol. 34, no. 4, pp. 362 - 380, 1988, doi: 10.2307/1485604.

O. T. Fajemila, M. R. Langer, and J. H. Lipps, “Spatial Patterns in the Distribution , Diversity and Abundance of Benthic Foraminifera around Moorea ( Society Archipelago , French Polynesia ),” pp. 1 - 25, 2015, doi: 10.1371/journal.pone.0145752.

S. Harikrishnan and D. S. Nathan, “Geosystems and Geoenvironment Abundance and distribution of recent benthic foraminifera from the southwestern part of the Bay of Bengal,” vol. 2, 2023.

S. Sujatmiko and S. Santosa, Geology of the Leuwidamar Sheet, Java. Bandung, Indonesia: Directorate of Geology, Ministry of Mines and Energy, 1992.

P. Diz, V. González-guitián, R. González-villanueva, and A. Ovejero, “BENFEP : a quantitative database of benthic foraminifera from surface sediments of the eastern Pacific,” pp. 697 - 722, 2023.

G. F. Rahmadani and Idarwati, “Determination of depositional environment based on microfossil and macrofossil characteristics of the Tuban Formation, Ngrayong Member, Ngujuran area, Bancar District, Tuban Regency, East Java,” Jurnal Penelitian Sains, vol. 26, no. 1, pp. 1 - 6, 2024.

A. E. Kennedy and A. L. Coe, “Development of the freeze - thaw processing technique for disaggregation of indurated mudrocks and enhanced recovery of calcareous microfossils,” no. April, pp. 193 - 204, 2026.

M. Denezine et al., “Methodological Development of a Combined Preparation for Micropaleontological and Sedimentological Studies of Samples From the Proterozoic Record,” vol. 10, no. March, pp. 1 - 14, 2022, doi: 10.3389/feart.2022.810406.

R. Ananda and H. Harnani, “Micropaleontological analysis of planktonic foraminifera fossils

from the Lemau and Simpangaur Formations for paleo-climate determination along the Pagar

River section, Ulu Talo District, Seluma Regency, Bengkulu,” Jurnal Penelitian Sains, vol. 26, no. 2, pp. 206 - 214, 2024.

A. G. P. Inuari and Idarwati, “Micropaleontological analysis of planktonic and benthic foraminifera fossils of the Gumai Formation and Baturaja Formation in the Mehanggin area and its surroundings, Ogan Komering Ulu Selatan Regency, South Sumatra,” in Proceedings of the 17th AVoER National Seminar, Palembang, Indonesia, 2025.

A. Maulidita, E. D. Mayasari, and E. W. D. Hastuti, “Geology and microfacies analysis for

determining the depositional environment of the Kalipucang Limestone Formation in the Urug

area, Jatiwaras District, Tasikmalaya Regency, West Java Province,” Jurnal Sumberdaya Bumi Berkelanjutan (SEMITAN), vol. 1, no. 1, pp. 144 - 153, 2022.

B. Parent et al., “Comparison of Four Foraminiferal Biotic Indices Assessing To cite this version : HAL Id : hal-03514631 Comparison of Four Foraminiferal Biotic Indices Assessing the Environmental Quality of Coastal Mediterranean Soft Bottoms,” 2022.

E. Lo, G. Cappelli, W. E. N. Austin, and R. Jackson, “Size Matters : Analyses of Benthic Foraminiferal Assemblages Across Differing Size Fractions,” vol. 6, no. December, pp. 1 - 8, 2019, doi: 10.3389/fmars.2019.00752.

G. R. Naik, M. N. Kulkarni, and M. M. Indap, “Understanding Role of Foraminifera in Environmental Studies : A Review,” vol. 5199, no. 6, pp. 457 - 471, 2023.

J. F. Mount, “Mixed siliciclastic - carbonate sediments: A proposed first-order textural and compositional classification,” Sedimentology, vol. 32, pp. 435 - 442, 1985.

C. Chen and H. Lin, “Applying Benthic Foraminiferal Assemblage to Evaluate the Coral Reef Condition in Dongsha Atoll lagoon,” vol. 20, 2017, doi: 10.6620/ZS.2017.56-20.

W. H. Blow, “Late Middle Eocene to Recent planktonic foraminiferal biostratigraphy,” in

Proceedings of the First International Conference on Planktonic Microfossils, P. Brönnimann and H. H. Renz, Eds. Leiden, Netherlands: E. J. Brill, vol. 1, 1969, pp. 199 - 422.

R. W. Barker and H. B. Brady, Taxonomic Notes. Houston, TX, USA: Society of Economic Paleontologists and Mineralogists, 1960, p. 238.

S. Boggs Jr., “Principles of Sedimentology and Stratigraphy”, 5th ed. Harlow, UK: Pearson Education Limited, 2014.

M. E. Tucker and V. P. Wright, “Carbonate Sedimentology”. Oxford, UK: Blackwell Scientific Publications, 1990.

R. J. Dunham, “Classification of carbonate rocks according to depositional texture,” in Classification of Carbonate Rocks, W. E. Ham, Ed. Tulsa, OK, USA: American Association of Petroleum Geologists (AAPG), 1962, pp. 108 - 123.

A. F. Embry and J. E. Klovan, "A late Devonian reef tract on northeastern Banks Island, N.W.T.," *Bull. Can. Pet. Geol.*, vol. 19, no. 4, pp. 730-781, Dec. 1971.




DOI: https://doi.org/10.31284/j.jemt.2025.v6i1.8822

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