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All Journal Jurnal RISET Geologi dan Pertambangan Journal of Mathematical and Fundamental Sciences Journal of Geoscience, Engineering, Environment, and Technology BULLETIN OF THE MARINE GEOLOGY Berita Sedimentologi Amerta

Aswan Aswan

Department Of Geological Engineering, Faculty Of Earth Science Technology, Institut Teknologi Bandung (ITB), Jl. Ganesha 10, Bandung, 40132, Indonesia

Author-ID : 3283807

Religion Arts Humanities Astronomy Chemistry Earth & Planetary Sciences Engineering Environmental Science Languange, Linguistic, Communication & Media Mathematics Physics Social Sciences

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Articles

Depositional Environmental Changes of Cimanceuri Formation Based on Mollusk Fossil Assemblages in Bayah, Banten Province Rahajeng Ayu Permana Sari; Winantris Winantris; Lili Fauzielly; Anita Galih Ringga Jayanti; Aswan Aswan; Unggul Prasetyo Wibowo
Journal of Geoscience, Engineering, Environment, and Technology Vol. 4 No. 2 (2019): JGEET Vol 04 No 02 : June (2019)
Publisher : UIR PRESS

Bayah is located in Lebak Regency, Banten Province. This location is chosen due to its abundant mollusk fossils which exposed along the outcrops. The aim of this research is to determine depositional environmental changes using mollusk fossil assemblages. Data obtained from a measured stratigraphic section of Cimanceuri Formation. It is dominated by very fine-fine sandstones with claystone intercalation. A total thickness of measured stratigraphic section is 4.2 meters. There are at least seventeen mollusk associations (bottom-top) consisting of 1) Ringicula arctatoides - Olivella tomlini were obtained. 2) Ringicula arctatoides - Marginella (Cryptospira) ventricosa sangiranensis. 3) Olivella tomlini, 4) Ringicula arctatoides - Olivella tomlini, 5) Ringicula arctatoides, 6) Turritella (Turritella) bantamensis - Scapharca (Scapharca) gedinganensis, 7) Polinices aurantius - Marginella (Cryptospira) ventricosa sangiranensis, 8) Scapharca (Scapharca) gedinganensis, 9) Scapharca (Scapharca) multiformis - Timoclea bataviana, 10) Turritella (Turritella) bantamensis tjicumpaiensis - Ringicula arctatoides, 11) Turritella (Turritella) bantamensis - Ringicula arctatoides, 12) Turritella (Turritella) bantamensis tjicumpaiensis - Turritella (Turritella) bantamensis, 13) Turritella (Turritella) bantamensis tjicumpaiensis - Ringicula arctatoides, 14) Turritella (Turritella) bantamensis - Architectonica sp., 15) Turritella (Turritella) bantamensis tjicumpaiensis, 16) Turritella (Turritella) bantamensis – Turritella (Turritella) bantamensis tjicumpaiensis, and 17) Turritella (Turritella) bantamensis. The condition with the most stable ecosystem is the association of Turritella (Turritella) bantamensis tjicumpaiensis - Turritella (Turritella) bantamensis (Association 12). At least there are seven depositional environmental changes that occur in this research area with two shallowing – deepening cycles : 1) open shallow marine, 2) subtidal – open shallow marine, 3) open shallow marine, 4) open shallow marine – subtidal, 5) subtidal, 6) subtidal – open shallow marine, and 7) open shallow marine.

Depositional Environmental Evolution of Nyalindung Formation based on Paleontology Molluscan Study, Ciodeng Area, Sukabumi, West Java, Indonesia Aswan Aswan; Elina Sufiati
JURNAL RISET GEOLOGI DAN PERTAMBANGAN Vol 31, No 2 (2021)
Publisher : Indonesian Institute of Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/risetgeotam2021.v31.1181

This research was conducted to understand and identify changes in the depositional environment of the Nyalindung Formation in the Ciodeng area, Sukabumi, based on mollusk paleontology and lithological associations. Paleontological study of mollusks to interpret the depositional environment becomes important due to the scarcity or absence of foraminifera in mollusk bearing rocks. Foraminifera is commonly used to determine depositional environment. The results of this mollusk paleontology study and lithological associations show at least sixteen changes in depositional environment. The environmental changes range from rivers, mangroves, beaches, tidal areas, shallow marine nearby the coast, shallow open marine, and relatively deeper marine. The depositional environmental changes shown by thissection might be related to tectonic activity and global sea level fall that occurred since the early Late Mioceneto Pleistocene. The sedimentary units in this section are also characterized by predominant fluvial, mangroves, beach, and tidal in the upper layers.

Oligocene Cyclic Sedimentation Deduced from Taphonomic Analysis of Molluscs in Lacustrine Deposits of the Pematang Group, Pesada Well, Central Sumatra Basin Aswan Aswan; Satia Graha; Dodi Suryadi; Taufan Wiguna; Sri Iman Qivayanti
Journal of Mathematical and Fundamental Sciences Vol. 48 No. 1 (2016)
Publisher : Institute for Research and Community Services (LPPM) ITB

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/j.math.fund.sci.2016.48.1.7

The Oligocene cycle of Pesada Well, Central Sumatra Basin, Indonesia is composed of a deepening-upward series of depositional cycles in a lacustrine environment affected by oscillations of the water level. Taphonomic analysis of gastropod molluscs was used to interpret the cycle architecture of the Brown Shale (Pematang Group). Four types of shell concentrations were identified. The early transgressive deposit has a distinct erosion surface at the base, contains concretions, is formed of coarse-grained sediment with abraded and broken shells, and is interpreted as reworked deposits. The late transgressive deposit contains a hiatal concentration formed by continuing lake level rise, with many complete shells preserved in life position. The maximum transgressive deposit has complete shells in life position or that have been transported, as well as juvenile molluscs and broken shells. The early regressive deposit contains alternating shell-rich and shell-poor layers. Since the lacustrine system shows no tectonic effects and also no marine influenced indications, the seven sedimentary cycles identified in the Pesada Well are likely to have been affected by oscillations between monsoonal and dry periods.

Tiering Style and Its Interpretation: Ichnofabric Study in Balikpapan Formation, Kutai Basin, Indonesia Ery Arifullah; Yahdi Zaim; Aswan Aswan; Djuhaeni Djuhaeni
Journal of Mathematical and Fundamental Sciences Vol. 51 No. 1 (2019)
Publisher : Institute for Research and Community Services (LPPM) ITB

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/j.math.fund.sci.2019.51.1.8

The determination of tiering style is an important task in ichnology. Tiering styles can be modeled by using ichnodiversity, the number of behaviors and number of tiers and their relationships. In this study, this approach was applied in the area of Samarinda, Kutai Basin, Indonesia. The values of ichnodiversity, number of behaviors, and number of tiers were identified. Ichnodiversity was strongly correlated with number of behaviors but weakly correlated with number of tiers. Accordingly, three tiering styles were identified. Typically, tiering styles A, B, and C demonstrated high ichnodiversity, number of behaviors and number of tiers. In general, the colonization window that coincides with the environmental conditions characteristic for deltaic settings is the factor that mostly regulates these tiering styles.

Basin-scale Paleoecology: Using Semi-quantitative Analysis of the Ichnofabric within Kutai Basin (Indonesia) Ery Arifullah; Yahdi Zaim; Aswan; Djuhaeni
Journal of Mathematical and Fundamental Sciences Vol. 53 No. 2 (2021)
Publisher : Institute for Research and Community Services (LPPM) ITB

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/j.math.fund.sci.2021.53.2.8

Ichnofossils are still not used in paleoecological studies, even though they are a valuable proxy for paleoecology. This study focused on a semi-quantitative approach to a number of ichnofabric variables, i.e. ichnofossil association, bioturbation index (BI), ichnodiversity (ID), number of behaviors (NB), penetration depth (PD), and burrow diameter (DM). It was proved that the scores of those variables were low to medium because of the paleoecological fluvial-marine transition depositional processes in the Serravallian-Tortonian interval in Kutai Basin, Indonesia. This paper contributes an ichnofabric model that is visualized as histograms. One histogram shows the most common ichnofossil associations found in ichnofabric units, i.e., Ophiomorpha, Skolithos, Paleophycus, Planolites, Thalassinoides, and Chondrites. The other histograms describe the ichnofabric variables scores for BI, ID, NB, PD, and DM. The variables represent low to medium scores, a characteristic of a brackish paleoecology at basin-scale, a unique indicator for the fluvial-marine transition depositional system.

IDENTIFICATION OF SUSPECTED PALEOTSUNAMI DEPOSITS STUDY FROM KARAPYAK BEACH, PANGANDARAN AREA, WEST JAWA, INDONESIA Aswan ⠀; Yan Rizal
BULLETIN OF THE MARINE GEOLOGY Vol 36, No 2 (2021)
Publisher : Marine Geological Institute of Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32693/bomg.36.2.2021.727

Identifying and determining paleotsunami deposits can be a vital tool for establishing the periodicity of earthquakes and their associated tsunami events beyond historical records. However, their deposits can be difficult to establish and to date. In this study, we used the characteristics of the 2006 Pangandaran tsunami deposit as a reference to identify paleotsunami deposits in Karapyak Beach, Pangandaran area, West Java, Indonesia. Similar to the 2006 Pangandaran tsunami deposit, the Karapyak Beach paleotsunami deposit is characterized by light brown loose sand materials overlying a dark brown paleosol layer with erosional contact. A thin layer of tsunami deposit, although varies in thickness, is locally found just above erosional contact. The deposit reveals non-laminated coarse grain size in the lower part that gradually changes into medium to fine sand in the upper part. The base of this lower part is rich with broken mollusc shells and corals. The mid to top of the lower part may contain several still-intact mollusc shells and corals, rock fragments, and anthropogenic products (roof tiles). Those types of fragments are absent in the upper part of this thin tsunami deposit. Grain size analysis shows a mixture of fine and coarse grains in the lower part of the 2006 tsunami deposits, as well as in the suspected paleotsunami deposits, suggesting an uprush of high energy flow during the sedimentation. The fining upward sequence above the mixed grain layers reflects a waning flow in pre-backwash deposition. Foraminifera analysis also shows a mixture of shallow and deep marine foraminifera in both recent tsunami and paleotsunami deposits. Based on the characteristics of the 2006 tsunami deposits, there are at least four paleotsunami deposits identified in Karapyak Beach, Pangandaran area.

First Evidence of Miocene Avian Tracks from Sumatra: Short Announcement Yahdi Zaim; Yan Rizal; Gregg F. Gunnell; Thomas A. Stidham; Russell L. Ciochon; Aswan Aswan
Berita Sedimentologi Vol 20, No 1 (2011)
Publisher : Ikatan Ahli Geologi Indonesia

Geological stories from the journey of mollusks fossils in Java Aswan Aswan
Berita Sedimentologi Vol 47, No 3 (2021)
Publisher : Ikatan Ahli Geologi Indonesia

The journey began in the Eocene with the presence of mollusk fossil in the Nanggulan Formation (near Yogyakarta) in Central Java. Many experts believe this was the early part of the Tethys system which might still be connected to the Tethys system in Europe.The oldest mollusk fossils type locality after Nanggulan is the Early Miocene Jonggrangan Formation in Kulon Progo near the city of Yogyakarta, which is dominated by the gastropod Haustator specimen. Molluscan paleontological studies of this type of locality reflect a restricted environment with less influence of the Tethyan system. Haustator are considered as the ancestor of the Turritellidae group, which is found mostly on Java Island, during the younger Tertiary to Quaternary Periods.The story continued to the Middle Miocene where the Tethyan realms indication was clearly observed by the presence of some typical Tethys species such as Volema and Babylonia from Nyalindung Formation, West Java. The regional sea level rise in this epoch (around 12 Ma) that was indicated by the presence of Vicarya as an index fossil, which occurrence was due to land submerging to become mangroves area. The fossil then quickly become extinct when the sea level dropped back.Late Miocene to Pliocene was like the transition period from the Tethyan realm to the Pacific realm, where the Tethyan fauna was no longer present. Only evolutional traces of the Middle Miocene mollusk fossils were observed. This continuous evolution is most clearly seen in Turritella cramatensis (late Miocene), Turritella acuticarinata (early Pliocene) and Turritella cikumpaiensis (late Pliocene) which was interpreted to have originated from Turritella angulata as their ancestors.Earth cooling environment that happened in the late Pliocene/early Pleistocene has led the diversity and evolution of a new group of mollusks, most clearly observed from the abundance of Turritella bantamensis in the Bojong Formation, Banten. The new Turritella group has a curved whorl that different from its predecessor with an angled whorl shape.Plio-Pleistocene tectonics event has ended the period of Java marine mollusks domination, then only freshwater mollusk fossils can be found in almost all Quaternary mollusks-bearing deposits.

GUA MABITCE: DATA BARU SITUS HOABINH DI SUMATRA BAGIAN UTARA Taufiqurrahman Setiawan; Anton Ferdianto; Nenggih Susilowati; Aswan Aswan; Andi Irfan; Anggun Ibowo Saputra; Dwi Wahyudi; Deni Andreian; Muhammad Bahrum; Primawan Primawan
AMERTA Vol. 38 No. 2 (2020)
Publisher : Badan Riset dan Inovasi Nasional

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract. Gua Mabitce: New Evidence of Hoabinh Site in Northern Sumatra. Gua Mabitce Cave is one of the caves that have the potential for archaeological research on the western coast of Aceh. The surface archaeological data of Sumatralith and the shell layers indicated this location possibly occupied in the past. How occupation and cultural characteristics are found at this site? What questions can be answered by conducting excavations to collect the underground archaeological data? The excavation data are analyzed and interpreted to describe the occupation in Gua Mabitce Cave. Although the dating of this site chronology cannot be obtained because the samples have not been analyzed, the results of the analysis of stone artifacts showed the cultural character of Hoabinh with stone tools artifacts, Sumatralith and flakes as its main equipment. The use of direct percussion is a very dominant technique for making stone tools. The cultural and residential characteristics of the Mabitce Cave are similar to other pre-neolithic sites in northern Sumatra, such as open sites on the east coast of northern Sumatra and cave/rock-shelter sites in the Bukit Barisan Mountains in the Aceh and North Sumatra regions. Abstrak. Gua Mabitce merupakan salah satu gua di Pesisir Barat Aceh yang memiliki potensi untuk diteliti secara arkeologis. Temuan kapak batu sumatralit dan fitur lapisan cangkang kerang di permukaan lantainya memberikan gambaran awal kemungkinan adanya hunian pada masa lalu. Bagaimana hunian dan karakter budaya yang ditemukan di lokasi ini? Jawaban pertanyaan itu perlu dilakukan ekskavasi di Gua Mabitce untuk memperoleh data arkeologi di bawah permukaan. Data artefak, ekofak, fitur, dan sebarannya dianalisis dan diinterpretasikan untuk menemukan gambaran kronologi dan penghunian di Gua Mabitce. Walaupun kronologi waktu situs belum dapat diperoleh karena sampel pertanggalan belum dapat dianalisis, hasil analisis artefak batu menunjukkan karakter budaya Hoabinh dengan artefak batu, sumatralith, dan serpih batu sebagai peralatan utamanya. Penggunaan kerakal yang dipangkas pada satu sisi sangat dominan ditemukan. Karakter budaya dan hunian di Gua Mabitce memiliki kesamaan dengan situs-situs pre-Neolitik lainnya di Sumatra bagian utara, seperti situs terbuka di pesisir timur Sumatra bagian utara dan situs gua/ceruk di Pegunungan Bukit Barisan di wilayah Aceh dan Sumatra Utara.

Co-Authors Andi Irfan Andi Irfan Syam Anggun Ibowo Saputra Anita Galih Ringga Jayanti Anton Ferdianto Deni Andreian Djuhaeni Djuhaeni Djuhaeni Dodi Suryadi Dwi Wahyudi Elina Sufiati Ery Arifullah Ery Arifullah Gregg F. Gunnell Lili Fauzielly Muhammad Bahrum Nenggih Susilowati Primawan Primawan Rahajeng Ayu Permana Sari Russell L. Ciochon Satia Graha Sopingi Silalahi Sri Iman Qivayanti Taufan Wiguna Taufiqurrahman Setiawan Thomas A. Stidham Unggul Prasetyo Wibowo Winantris Winantris Yahdi Zaim Yahdi Zaim Yahdi Zaim Yan Rizal, Yan

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