Nannofossil Distribution and Age of Kendeng Zone In Kalibeng River Section of Kedungringin, Plandaan Area, Jombang, East Java
| Autor: | Dwi Fitri Yudiantoro, Carolus Prasetyadi, Rubiyanto Kapid, Siti Umiyatun Choiriah |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Gephyrocapsa
010504 meteorology & atmospheric sciences biology Pleistocene Discoaster Lithology Coccolithus Ceratolithus 010502 geochemistry & geophysics biology.organism_classification 01 natural sciences Paleontology Marl General Earth and Planetary Sciences Sequence stratigraphy Geology 0105 earth and related environmental sciences |
| Zdroj: | Indonesian Journal on Geoscience. 7 |
| ISSN: | 2355-9306 2355-9314 |
| DOI: | 10.17014/ijog.7.1.15-24 |
| Popis: | DOI: 10.17014/ijog.7.1.15-24 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). |
| Databáze: | OpenAIRE |
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