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Journal of Earth and Marine Technology (JEMT)
Published by Institut Teknologi Adhi Tama Surabaya
ISSN : -     EISSN : 27238105     DOI : https://doi.org/10.31284/j.jemt
Core Subject : Science, Engineering,
Civil Engineering, Building, Construction & Architecture Earth & Planetary Sciences Energy Physics Transportation
Earth Science and planetary, Geology, Geochemistry, Geophysics, Geodesy, Geomatics, Geotech, Rock mechanics, Mining engineering, Natural Disaster, Land and ocean development, Natural resources, Environmental science, Social impact of mining and marine activity, Science and technology in mapping and surveying, Optical remote sensing and radar remote sensing, Cadastre and 3D modeling, Geodynamics theory and application, Geospatial, Land Surveying, Geomarine, Photogrammetry, Marine engineering
Arjuna Subject : Ilmu Bumi dan Planet (semua kategori) - Ilmu Bumi dan Planet (Lain-Lain)
Articles 2 Documents
 1 
Search results for , issue "Vol 6, No 1 (2025)" : 2 Documents clear
Facies and Architectural Element Analysis of Braided Fluvial Succession : The Paleogene Cawang Member, Ogan Komering Ulu Selatan Area , South Sumatra Daryono, Sapto Kis; Kartika, Andi; Saktiawan, Tridadi
Journal of Earth and Marine Technology (JEMT) Vol 6, No 1 (2025)
Publisher : Lembaga Penelititan dan Pengabdian kepada Masyarakat - Institut Teknologi Adhi Tama Suraba

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.jemt.2025.v6i1.8097

Abstract

The Cawang Member of the Kikim Formation plays an important role in understanding the Paleogene sedimentary development of the Palembang Subbasin due to its presence as a pre-rift deposit that occurred before or simultaneously with the formation of the basin. Interpretations of the stratigraphic evolution of the Paleogene succession are based on detailed surface geological mapping, particularly through lithofacies identification and depositional environment analysis. These observations reveal that the lithological characteristics and facies distribution of the Cawang Member record dynamic sedimentary processes associated with early basin evolution. Facies analysis was conducted along measured stratigraphic sections encompassing conglomerate–sandstone 1 and sandstone 1-sandstone units exposed along the Bumi Agung and Batu Belang traverses in the South Ogan Komering Ulu area, South Sumatra. The conglomerate-sandstone 1 and sandstone 1-sandstone units attains a thickness of approximately 158.82 m, and about 177.50 m. A total of nine lithofacies were identified, including matrix-supported massive gravel (Gmm), matrix-supported, gravel (Gmg), massive gravel (Gm), massive sandstone (Sm), horizontally bedded sandstone (Sh), low-angle cross-bedded sandstone (SI), carbonaceous mud (C), massive fine sandstone-silt-mud (Fm), and massive siltstone and mudstone (Fsm). These lithofacies are grouped into four main facies associations: gravel bars (GB), sandy bedforms (SB), channels (CH), and overbank fine (FF). The assemblage of facies associations indicates deposition within a fluvial system dominated by braided river processes, with localized influence of sediment gravity flows
Geomorphological Study of the Samigaluh Area and Its Surroundings, Kulon Progo Regency, Yogyakarta Azzahra, Fadea Risa; Setiawan, Budhi
Journal of Earth and Marine Technology (JEMT) Vol 6, No 1 (2025)
Publisher : Lembaga Penelititan dan Pengabdian kepada Masyarakat - Institut Teknologi Adhi Tama Suraba

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.jemt.2025.v6i1.8650

Abstract

Samigaluh District and its surrounding areas, Kulon Progo Regency, Special Region of Yogyakarta, form part of the Kulon Progo Mountains, which lie within the eastern segment of the Southern Serayu Mountains zone. This region exhibits complex geomorphological conditions resulting from the interaction of tectonic activity, volcanism, and ongoing denudational processes. This study aims to provide knowledge and benefits for relevant stakeholders and readers, thereby supporting related scientific fields and areas of expertise. The research method involved field observations combined with analyses using Geographic Information Systems (GIS) and Digital Elevation Model (DEM) data. Geomorphological characteristics were analyzed by correlating drainage patterns, slope gradients, and lithological units to identify landform features within the study area. The results indicate that the geomorphic units in the Samigaluh area consist of Volcanic Denudational High Hills, representing remnants of ancient volcanic edifices that have undergone prolonged weathering and erosion over geological timescales; Intrusive Hills, formed by the intrusion of igneous rocks into surrounding strata and subsequently exposed by erosion; and Karst High Hills, which developed predominantly through carbonate dissolution processes. The diversity of these geomorphic units reflects the strong influence of geological dynamics on the landscape evolution of the study area.

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