Choiriah, Siti Umiyatun and Carolus Prasetyadi, Carolus Prasetyadi and Yudiantoro, Dwi Fitri and Kapid, Rubiyanto (2020) Nannofossil Distribution and Age of Kendeng Zone In Kalibeng River Section of Kedungringin, Plandaan Area, Jombang, East Java. Indonesian Journal of Geology, 7 (1). pp. 15-24. ISSN 2355-9314
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Abstract
Abstract - This study was carried out at Kalibeng River Section, in Kedungringin area, a site with lithology suitable
for a nannoplankton research. Methods used in this research include performing a stratigraphical measurement section
at the field, collecting thirty-two samples, and preparing the samples with the smear slide method using a polarizing
microscope with 1000x magnification, and preparing several rock samples using SEM analysis. The analysis of
nannofossil resulted in twelve genera and forty-three species. The identified genera are: Calcidiscus, Coccolithus,
Ceratolithus, Discoaster, Gephyrocapsa, Helicosphaera, Pseudoemiliania, Reticulofenestra, Rhabdosphaera, Sphenolithus, Syracosphaera, and Umbilicosphaera. The presence of these genera indicates that Kalibeng River Section
have abundant nannofossils and based on the nannofossil analysis, from older to younger, the studied stratigraphic
sequence indicates a more detailed age determination as follows: the Marl Unit of Kalibeng is NN10-NN18 (Middle
Miocene to Pliocene), Calcareous Sandstone Unit of Sonde is NN19-NN20 (Pliocene-Pleistocene), and Calcareous
Claystone Unit of Sonde is NN20-NN21 (Pleistocene).
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| Item Type: | Article |
|---|---|
| Subjek: | Q Science > QE Geology |
| Divisions: | x. Faculty of Engineering, Science and Mathematics > School of Engineering Sciences |
| Depositing User: | Dr.Ir. MT SITI UMIYATUN CHOIRIAH |
| Date Deposited: | 31 Aug 2020 05:46 |
| Last Modified: | 31 Aug 2020 05:46 |
| URI: | http://eprints.upnyk.ac.id/id/eprint/23561 |
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