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All Journal Techno LPPM Berita Sedimentologi
Setiawan, M. Nurjati
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Earth & Planetary Sciences

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Sedimentary facies and depositional environments of the Halang Formation in the North Serayu Basin: Insights from outcrop study in Bantarbolang, Pemalang, Central Java Barizi, A.R. Falkhan; Prasetyadi, Carolus; Janukusuma, Miftakhuddin A.S.; Setiawan, M. Nurjati
Berita Sedimentologi Vol 50, No 1 (2024)
Publisher : Ikatan Ahli Geologi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51835/bsed.2024.50.1.447

Abstract

Halang Formation has been the subject of extensive research due to its unique characteristics, particularly its turbidite facies, which indicate deposition in deep marine environments. Previous studies have revealed a complex lithological composition, including sandstone, calcareous sandstone, claystone, marl, tuff, and breccia, with an upward coarsening pattern indicative of progradation processes. The presence of Bouma’s sequence further confirms the dominance of turbidite deposits within the formation. This research aims to define the depositional environment of the Halang Formation through detailed lithofacies and microfossil analyses, focusing on a previously understudied area in the North Serayu Basin. By integrating data from field observations and micropaleontological analysis, this study seeks to provide valuable insights into the sedimentary processes and paleoenvironments that formed the Halang Formation. Our findings indicate that the formation was deposited in a submarine fan environment, specifically in the smooth portion of suprafan lobes, which are characterized by dominant classical turbidite (CT) facies. Micropaleontological analysis suggests an inner to outer bathyal environment at depths ranging from 283.65 to 713.7 meters. These results contribute to our understanding of the Halang Formation depositional history and the broader geological evolution of the North Serayu Basin.
THE STRUCTURAL GEOLOGY STUDY AND SLOPE STABILITY ANALYSIS IN KARANGBAWANG VILLAGE, AJIBARANG, CENTRAL JAWA Setiawan, Jatmika; Setiawan, M. Nurjati; Rahman, M. Gazali; Prasetyo, Abdullah Panji; Hapsari, Nuli
Journal TECHNO Vol. 8 No. 1 (2022): Mei
Publisher : Universitas Pembangunan Nasional Veteran Yogayakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/journal techno.v8i1.7342

Abstract

Engineering geology or Geotechnical is the application of geological science in engineering practice for the purpose of ensuring that geological factors affecting the location, design, construction, operation and maintenance of engineering works have been properly identified and taken into account. Engineering geology research can be carried out during the planning, environmental impact analysis, civil engineering design, optimization engineering and construction stages of public and private projects, as well as in the post-construction and project investigation stages. Engineering geology research is carried out by a geologist or an educated engineering geologist, trained professionals and has the ability to recognize and analyze geological hazards and adverse geological conditions. The whole purpose is to protect life and property from damage as well as solutions to geological problems. Geological observations made in the form of geological structures in the form of joints and faults are very important parameters carried out in the planning stage of a development because it is very influential in the short, medium and long term stability of a civil building. Detailed measurements and mapping of the intensity level of geological structures will be able to assist engineering geologists in making recommendations for a civil construction project. Geological engineering study of the Ajibarang area and its surroundings, especially in the area of PT.development project crusher and conveyor. So that it will get good slope safety and can be used as the basis for the development of the crusher and conveyor at PT. Semen Bima. 
Co-Authors Barizi, A.R. Falkhan Hapsari, Nuli Janukusuma, Miftakhuddin A.S. Jatmika Setiawan, Jatmika M. Gazali Rahman Prasetyadi, Carolus Prasetyo, Abdullah Panji