Facies Model of Coal Nampol Formation and Limestone Punung Formation in Sudimoro Region, Pacitan, East

RAHMAD, Basuki and BUNTORO, Aris and RAHARJO, Sugeng and SETYANINGSIH, Dita Antari and ARMYANI, Syifa Aldhia Lafash and RIZKIANTOADIBT, Adyaksa PRYody (2023) Facies Model of Coal Nampol Formation and Limestone Punung Formation in Sudimoro Region, Pacitan, East. In: Proceeding of International Symposium on Earth Science and Technology 2023, November 30 - December 2023, Japan.

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Abstract

Physiography of the research area includes the Southern Mountain Zone of Eastern Java (Van Bemmelen, 1949),
administratively located in Pacitan, East Java. The southern mountain zone of eastern Java has a "V" shaped fault
pattern which is thought to be a deep seated fault. This structure is trending northeast - southwest and northwest -
southeast causing the formation of highs and lows which control the sedimentation of the southern mountains of
eastern Java (Untung & Sato, 1978). The research area is located between the high and low in the Southern
Mountain Basin of Eastern Java.
The interesting thing in geological research is that there is a facies change contact between the Nampol Formation
coal and Punung Formation limestone in the Middle Miocene (Sartono, 1964). The results of observations of field
geological outcrops, the depositional environment for the Nampol Formation coal is shore, whereas the Punung
Formation limestone is shelf. This condition begins with the formation of a mangrove swamp environment
containing gastropod fossils with high plants as the source of coal-forming plants in freshwater conditions, then the
environment changes to a back reef lagoon, forming a carbonate facies due to transgression in saltwater conditions
(saline water).
Keywords: fasies, coal, limestone, shore, mangrove swamp, shelf, back reef Langoon

Item Type:	Conference or Workshop Item (Paper)
Uncontrolled Keywords:	fasies, coal, limestone, shore, mangrove swamp, shelf, back reef Langoon
Subjects:	Q Science > QE Geology
Divisions:	Faculty of Engineering, Science and Mathematics > School of Engineering Sciences
Depositing User:	Dr.Ir. MT SITI UMIYATUN CHOIRIAH
Date Deposited:	08 Jul 2024 05:46
Last Modified:	08 Jul 2024 05:46
URI:	http://eprints.upnyk.ac.id/id/eprint/40173

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