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Berita Sedimentologi
Published by Forum Sedimentologiwan Indonesia
ISSN : 08539413     EISSN : 2807274X     DOI : https://doi.org/10.51835/bsed
Core Subject : Science,
Earth & Planetary Sciences
BERITA SEDIMENTOLOGI aims to disseminate knowledge on the field of sedimentary geology to its readers. The journal welcomes contributions in the form of original research articles, review articles, short communications and discussions and replies. Occasionally, Berita Sedimentologi also includes field trip reports and book reviews, which are published only after going through peer-review processes. The main geographical areas of interest are Indonesia and SE Asia, however contribution from the rest of the world is also welcome. Berita Sedimentologi covers broad topics within sedimentary geology, particularly on depositional processes and their records in the rocks, petrology, sedimentology and stratigraphy of both siliciclastic and carbonate rocks; sequence stratigraphy, paleontology, biostratigraphy and sedimentary geochemistry. The journal also accepts articles on interdisciplinary research in sedimentary basin analysis, including large-scale basin geodynamics processes, mechanism of sedimentary basin formation, earth surface processes, sediment routing systems, petroleum geoscience and applied sedimentary geology analysis for mining and engineering geology.
Arjuna Subject : Ilmu Bumi dan Planet (semua kategori) - Geologi
Articles 7 Documents
 1 
Search results for , issue "Vol 30, No 1 (2014)" : 7 Documents clear
The Age and Provenance of the Globidens timorensis Holotype Maayke J. Koevoets; Anne S. Schulp; Simon R. Troelstra
Berita Sedimentologi Vol 30, No 1 (2014)
Publisher : Ikatan Ahli Geologi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1260.23 KB) | DOI: 10.51835/bsed.2014.30.1.136

Abstract

Three fossil teeth reported from the Upper Cretaceous of West Timor are the only known fossils of Mosasaurus-type marine reptiles in the eastern Tethys region. However, there is some uncertainty about the exact locality of origin of these fossils.
Cover, Table of Contents, and Introduction to Volume Berita Sedimentologi
Berita Sedimentologi Vol 30, No 1 (2014)
Publisher : Ikatan Ahli Geologi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2214.542 KB) | DOI: 10.51835/bsed.2014.30.1.131

Abstract

Cover, Table of Contents, and Introduction to Volume
An Introduction to Cenozoic Macrofossils of Indonesia J.T. (Han) van Gorsel
Berita Sedimentologi Vol 30, No 1 (2014)
Publisher : Ikatan Ahli Geologi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2749.968 KB) | DOI: 10.51835/bsed.2014.30.1.137

Abstract

A brief overview is presented of the principal groups of Cenozoic macrofossils from outcrops in Indonesia. Prior to the 1930's macrofossils, in particular mollusks, were the principal objects of paleontological and biostratigraphic studies in Indonesia. Since then focus has shifted to microfossils, but it is argued that macrofossils still have the potential to significantly contribute to the knowledge of biostratigraphy, paleoenvironments, paleoclimate, paleobiogeography and plate tectonic reconstructions of the region. Cenozoic marine macrofossil assemblages from Indonesia all represent tropical faunas of Indo-Pacific province affinity.
On the Heterostegina– Tansinhokella– Spiroclypeus Lineage(s) in SE Asia Peter Lunt; Willem Renema
Berita Sedimentologi Vol 30, No 1 (2014)
Publisher : Ikatan Ahli Geologi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (5652.89 KB) | DOI: 10.51835/bsed.2014.30.1.132

Abstract

The evolutionary series from Heterostegina (Vlerkina), through Tansinhokella to Spiroclypeus is reviewed. Both previously unpublished work (Muhar, 1956) and new field data is used to support the hypothesis that this evolutionary development can be observed twice in the fossil record. The first lineage became extinct at the Oligocene- Eocene boundary, and then the same morphologies re-appeared in the middle and later Oligocene. Both the negative evidence (absence) of Early Oligocene [Tc / Td Letter Stage] records, and the positive evidence of a gradual evolutionary series in Oligocene times, are discussed. At the moment there is no reliable way to distinguish the Late Eocene and later Oligocene tests, so the same generic name has to be applied to each occurrence, even though they are separated in time. This leads to the unusual situation that all three genera have to be reported as having two evolution and two extinction datums.The later Oligocene transition of Tansinhokella into Spiroclypeus is observed to be more gradual than the morphological criteria used to separate these genera in 1991 (Banner and Hodgkinson), but the two names are retained for end members of a gradual series with a distinct stratigraphic record.The hypothesis of iterative evolution was based on work in Java, and it was predicted that the other areas in Asia would preserve the same evolutionary pattern in the stratigraphic record. This work shows that the second evolutionary development of Tansinhokella and Spiroclypeus was at the same time in three geographically separate areas, the most reasonable explanation for which is iterative evolution, rather than ecophenotypic fluctuations or faunal migrations.The importance of Tansinhokella in the biostratigraphic subdivision of Letter Stage Te is highlighted.
Micropaleontological Education in Indonesia Herman Darman
Berita Sedimentologi Vol 30, No 1 (2014)
Publisher : Ikatan Ahli Geologi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (952.115 KB) | DOI: 10.51835/bsed.2014.30.1.138

Abstract

In May 2012, Bailey and Jones published an article titled “Micropalaeontology Under Threat!” in Geoscientist Online Special, which attracted a number of readers’ attention. This topic was discussed further in the Sedimentology and Paleontology Linked-in group. The article describes trends in the United Kingdom, but these are similar in many other countries. It observed how since the 1980's the employment opportunities for micropaleontologists decreased as a result of downsizing by oil companies, how training opportunities decreased due to reduction in the number of universities teaching micropaleontology courses, and how retirements of an aging population of biostratigraphers may soon lead to a shortage in experienced biostratigraphers.To understand the situation in Indonesia, the topic was launched in IAGI-net. A simple survey was run on Facebook to involve students. This article summarizes the discussion and survey to provide a general understanding and quick overview on how micropaleontological education is conducted in Indonesia.
Biostratigraphy of the Late Miocene Halang Formation in the Loh Pasir Succession, Banyumas, Central Java Marfasran Hendrizan; Rubiyanto Kapid; Djuhaeni Djuhaeni
Berita Sedimentologi Vol 30, No 1 (2014)
Publisher : Ikatan Ahli Geologi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2636.417 KB) | DOI: 10.51835/bsed.2014.30.1.133

Abstract

A detailed biostratigraphic study was conducted to determine the spatial and temporal relationships between the Miocene Halang and Pemali Formations in Central Java. We studied calcareous nannofossils from a 1.4 km thick outcrop section of the Halang Formation at Loh Pasir to document biostratigraphic changes in the Banyumas area. The marine Halang Formation shows three types of lithofacies, predominantly mixed sandy and muddy in the upper part and muddy and sandstone facies in the lower part. We identified 57 species of 13 genera of calcareous nannofossils in 121 samples, which could be divided into five Late Miocene biozones. These zones are Discoaster brouweri, Discoaster hamatus, Discoaster bollii, Discoaster prepentaradiatus and Discoaster quinqueramus. Our results are consistent with previous biostratigraphic work in the Karanggedang 1 well location, except in the lower part of this formation, due to the lack of Catinaster coalitus in the Loh Pasir section.
A Revision of the Biostratigraphy and Strontium Isotope Dating of Oligocene-Miocene Outcrops in East Java, Indonesia Essam F. Sharaf; Marcelle K. BouDagher-Fadel; J.A. (Toni) Simo; Alan R. Carroll
Berita Sedimentologi Vol 30, No 1 (2014)
Publisher : Ikatan Ahli Geologi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2011.146 KB) | DOI: 10.51835/bsed.2014.30.1.134

Abstract

The biostratigraphic ranges of identified larger benthic and planktonic foraminifera from Tertiary exposures in East Java Basin have been tied to the ages constrained from the Strontium isotope dating of some of the most abundant large benthic foraminifera. Foraminiferal assemblages and Strontium data have provided precise age ranges of the different stratigraphic units. The age of the exposed Lower Kujung Formation is late Early Oligocene (Rupelian P20) to Late Oligocene ( Te1-4), equivalent to 28.78- 28.27 Ma). The age of the exposed Upper Kujung Formation is Late Oligocene, Chattian ( P22, Te1-4) to Early Miocene (Aquitanian, N5a, Te5), equivalent to 24.31- 23.44 Ma. The age of the exposed Tuban Formation is late Early Miocene, (Burdigalian) to Middle Miocene (Langhian, N5b-N9, Te5-Tf1), equivalent to 20.80- 15.25 Ma. The age of the exposed Ngrayong Formation is late Middle Miocene (Serravallian, N12-N13, Tf2), equivalent to ~15.0- ~13.0 Ma. Age boundaries between the lithostratigraphic units were determined as: Upper Kujung- Tuban (22 Ma), Tuban-Ngrayong (15.25 Ma) and Ngrayong -Bulu Member of the Wonocolo Formation (12.98 Ma).

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