<abstract xmlns="http://www.w3.org/1999/xhtml"><p>Walat Formation is equivalent to Bayah Formation. This formation is the beginning of Bogor basin deposition. In this case, age and environment of this formation have been analyzed by previous researchers, but the results of age and environment interpretations have different ranges, especially from its palynological aspect which until now Walat Formation is rarely analyzed using this aspect. This research was conducted to identify the age and depositional environment of Walat Formation in Sukabumi region by using pollen and spores to confirm different interpretations of previous studies. Measure section was carried out in sampling and chemical treatment method was carried out to see palynomorph content in the rock. Furthermore, data analysis was carried out with range of interval zones and pollen grouping based on their environment.</p><p>The results show that Walat Formation has Late Eocene age based on the interval zone between first occurrence of <italic>Verrucatosporites usmensis</italic> and <italic>Meyeripollis naharkotensis,</italic> and <italic>the last occurence of Proxapertites operculatus, Proxapertites cursus, and Cicatricosisporites eocenicus</italic>. Walat Formation has fluvial depositional environment characterized by the dominance of <italic>Proxapertites operculatus</italic> and <italic>Proxapertites cursus</italic>. The results of this study confirm that the Walat Formation has an Eocene age and a fluvial depositional environment from a palinological aspect.</p></abstract>

Walat Formation is equivalent to Bayah Formation. This formation is the beginning of Bogor basin deposition. In this case, age and environment of this formation have been analyzed by previous researchers, but the results of age and environment interpretations have different ranges, especially from its palynological aspect which until now Walat Formation is rarely analyzed using this aspect. This research was conducted to identify the age and depositional environment of Walat Formation in Sukabumi region by using pollen and spores to confirm different interpretations of previous studies. Measure section was carried out in sampling and chemical treatment method was carried out to see palynomorph content in the rock. Furthermore, data analysis was carried out with range of interval zones and pollen grouping based on their environment.The results show that Walat Formation has Late Eocene age based on the interval zone between first occurrence of Verrucatosporites usmensis and Meyeripollis naharkotensis, and the last occurence of Proxapertites operculatus, Proxapertites cursus, and Cicatricosisporites eocenicus. Walat Formation has fluvial depositional environment characterized by the dominance of Proxapertites operculatus and Proxapertites cursus. The results of this study confirm that the Walat Formation has an Eocene age and a fluvial depositional environment from a palinological aspect.

Age and Depositional Environment of Walat Formation Based on Palynological Analysis in Sukabumi Regency, West Java, Indonesia

Department Geology Engineering, Faculty of Geological Engineering

Pakistan Journal of Geology

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Walat Formation is equivalent to Bayah Formation. This formation is the beginning of Bogor basin deposition. In this case, age and environment of this...

Age and Depositional Environment of Walat Formation Based on Palynological Analysis in Sukabumi Regency, West Java, Indonesia

Published Online: Jan 09, 2021

Page range: -

DOI: https://doi.org/10.2478/pjg-2021-0001

Keywords
Palynology, Walat Formation, Age, Environment, and Sukabumi

© 2021 Rizki Satria Rachman et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Age and Depositional Environment of Walat Formation Based on Palynological Analysis in Sukabumi Regency, West Java, Indonesia

Published Online: Jan 09, 2021

Page range: -

DOI: https://doi.org/10.2478/pjg-2021-0001

KeywordsPalynology, Walat Formation, Age, Environment, and Sukabumi

© 2021 Rizki Satria Rachman et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Keywords
Palynology, Walat Formation, Age, Environment, and Sukabumi