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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 10 Documents
 1 
Search results for , issue "Vol 29, No 1 (2014)" : 10 Documents clear
Introduction to Cenozoic Biostratigraphy of Indonesia-SE Asia J.T. (Han) van Gorsel; Peter Lunt; Robert Morley
Berita Sedimentologi Vol 29, No 1 (2014)
Publisher : Ikatan Ahli Geologi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (4492.323 KB) | DOI: 10.51835/bsed.2014.29.1.140

Abstract

An overview is presented of the current 'tools' of biostratigraphy and biofacies interpretation, as applied in the Cenozoic basins of Indonesia and Southeast Asia. We discuss previous work and historic developments of the biozonations and biofacies significance of the principal microfossil groups used in the region (foraminifera, calcareous nannofossils, palynology) and present the latest zonation charts and tables of key references. Brief reviews of work done on ostracodes, diatoms and radiolaria are also included.
Palynofacies Analysis of the Eocene Bayah Formation in Bayah High, Banten Block, SW Java Bob Yuris Chandra; A.T. Rahardjo; Dardji Noeradi
Berita Sedimentologi Vol 29, No 1 (2014)
Publisher : Ikatan Ahli Geologi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2083.531 KB) | DOI: 10.51835/bsed.2014.29.1.145

Abstract

The objective of this study is to characterize the palynofacies of the Bayah Formation from cores of wells DDH-1 (242m) and DDH-2 (315m).The wells were systematically sampled at 5m intervals. There were 47 samples from the DDH-1 and 62 samples from the DDH-2 wells. Sediment preparation was done in the Palynology Laboratory, Geological Engineering of ITB Laboratory. The examination of the processed samples was carried out with a light microscope at 400X magnification. The results of palynofacies investigation are presented in the form of palynodebris diagrams, which were then used for the basic interpretation. The palynodebris character of the Bayah Formation at DDH-1 core can be grouped into 6 palynofacies units, DDH-2 core into 7 palynofacies units. Palynofacies units 1 to 4 showed similar successions and can be correlated. The datum of the palynofacies correlation was the acme zone of Proxapertites operculatus, which is present in both wells.
A Review of the Foraminiferal Biostratigraphy of the Melinau Limestone, Sarawak Peter Lunt
Berita Sedimentologi Vol 29, No 1 (2014)
Publisher : Ikatan Ahli Geologi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2035.836 KB) | DOI: 10.51835/bsed.2014.29.1.141

Abstract

A study of the Melinau limestone, especially in the continuous Melinau Gorge section, reviews taxonomic concepts of Adams (1965) in the Heterostegina- Tansinhokella- Spiroclypeus lineage, proves the presence of Middle Eocene 'Letter Stage' Ta, at the base of the Melinau Limestone, examines the nature of the Eocene- Oligocene boundary and the absence of Wilfordia sarawakensis Adams from other Tb Eocene limestones in the region. Strontium dating and biostratigraphy calibrated to GTS04 shows there to be a significant change in sedimentary rates or preserved thickness during mid-Oligocene (latest Tc or intra-Td times), but the disconformity noted by Adams (1970) was not found, probably due to poor exposure. Observations on the termination of the Melinau limestone agree with those of Adams (1965, 1970) and Wannier (2009), with an initial event near the Oligo-Miocene boundary (Te4 to Te5 boundary) and the youngest limestones dated as Te5, about 20.3 Ma.
Late Eocene-Pleistocene Planktonic Foraminiferal Biostratigraphy of the Kuripan-1 Well, North Central Java, Indonesia Darwin Kadar; Ricky Adi Wibowo; Hansen Wijaya; Leonardo Sebayang; Emma Yan Patriani
Berita Sedimentologi Vol 29, No 1 (2014)
Publisher : Ikatan Ahli Geologi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2080.781 KB) | DOI: 10.51835/bsed.2014.29.1.146

Abstract

Planktonic foraminifera of the Kuripan-1 well, North Central Java, Indonesia were studied in detail, using side wall cores collected from the marine Ngimbang, Kujung, Tuban, Selorejo and Lidah Formations. The age interpretation, using first and last appearance datum planes. concludes that the well section ranges in age from Late Eocene to Pleistocene (upper Zone P17- Zone N22 of Blow, 1969). The main datum planes, from old to young, are Globigerina gortanii(B), Globigerina sellii(B), Globigerina angulisuturalis(B), Globigerinoides primordius(B), Globorotalia kugleri(T), Praeorbulina sicana(B), Orbulina suturalis(B), Globorotalia peripheroronda/G.praefohsi(T) and Globorotalia tosaensis(B).The Ngimbang Formation is likely Late Eocene in age and the Kujung Formation ranges from latest Eocene(?) to earliest Miocene (upper Zone P17- lower N4). The Selorejo and Lidah Formatons are likely Late Pliocene to Pleistocene in age. The zonation also shows the presence of a late Middle Miocene- Early Pliocene hiatus between the Tuban and the overlying Selorejo Formation, spanning zones N13- N19, which reflects a Late Miocene uplift event in the Rembang zone.A chronostratigraphic correlation between the Kuripan-1 and the Purwodadi-1 wells is attempted using some of the above datum planes, as well as other bioevents occurring in both wells. The correlation of the two wells indicates that the Late Miocene hiatus in Kuripan-1 is correlatable with the top of the Tuban Formation in Purwodadi-1. The Prupuh limestone, above the Globigerina sellii top datum in Purwodadi 1, is not developed in Kuripan-1. Here, the carbonate facies changes to a mudstone of shallow marine environment. The upper Ngimbang and Kujung Formations in Kuripan-1, bounded at the top by the Top Globigerina sellii datum and at the base by the Top Globorotalia centralis datum, is well correlated with the upper Ngimbang and Kujung Formations in the Purwodadi-1 well.
Making Sense of Mud: The Use of Benthic Foraminifera in Mudstone Sedimentology, Sabah, North Borneo Jon Noad; Rachel Preece
Berita Sedimentologi Vol 29, No 1 (2014)
Publisher : Ikatan Ahli Geologi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2023.859 KB) | DOI: 10.51835/bsed.2014.29.1.142

Abstract

The use of microfossils in the dating of sedimentary rocks is commonplace, and well documented. However, the use of these fossils, particularly benthic foraminifera, in the interpretation of depositional environments has received less attention. A series of mudstone samples collected from five formations outcropping in eastern Sabah, NE Borneo, ranging in age from Eocene to Pliocene in age, has yielded more than 80 species of calcareous and agglutinated foraminifera. These have been interpreted to give both stratigraphical and depositional information.The microfossil assemblages are interpreted to represent conditions ranging from those inhabiting mangroves, very shallow marine to paralic coastal settings, through to open marine, relatively anoxic settings. These interpretations are supported by the interpreted sedimentology of measured outcrop sections. The preservation, size of individual tests, species diversity and diagenetic signatures have been combined to provide a detailed picture of conditions extant at the seabed during deposition of these sediments. This includes oxygen and energy levels, as well as evidence of post mortem dissolution. Around 60% of the samples yielded a very limited fauna, or were barren. Among the assemblages identified are deep marine 'flysch-type faunas' that are also comparable to the Agua Salada Fauna of Northern Venezuela.The synthesis of foraminiferal and sedimentological data provides a powerful tool in identifying depositional environments in seemingly homogenous mudstone beds. Hence it can be used as a correlation tool. Through applying the process described here to hydrocarbon exploration, it is possible to extrapolate additional information on depositional settings from core, and hence provide sequence stratigraphic architectural trends. These can be used to predict source rock distribution. This approach may also be applied to cuttings data in the absence of well logs or core.
A Late Oligocene Drowned Pinnacle Reef in Deepwater Makassar Straits J.T. (Han) van Gorsel; C.E. Helsing
Berita Sedimentologi Vol 29, No 1 (2014)
Publisher : Ikatan Ahli Geologi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1966.226 KB) | DOI: 10.51835/bsed.2014.29.1.147

Abstract

A steep seamount with 320-350m of relief was recently discovered in about 2050m deep water of the South Makassar Straits. It was informally named Snorkel by ExxonMobil interpreters, but remains unnamed. Drop core samples collected from different levels of the buildup by ExxonMobil in 2008 show the Snorkel feature to be an Oligocene pinnacle reef, which drowned in latest Oligocene time.The carbonate buildup is covered in a thin coating of ferro-manganese cement, representing over 20 Million years of exposure and non-deposition in a deep water environment.The Snorkel feature is one of the many carbonate buildups that formed on Sundaland and around its margins after a Middle-Late Eocene regional rifting/subsidence event (e.g. 'Berai Limestone' of East Kalimantan), but until now is the only known example of an Oligocene reefal buildup that was never buried under younger sediments.
The Distribution of Benthic Foraminifera in Indonesian Shallow Waters Suhartati M. Natsir
Berita Sedimentologi Vol 29, No 1 (2014)
Publisher : Ikatan Ahli Geologi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1434.837 KB) | DOI: 10.51835/bsed.2014.29.1.143

Abstract

Indonesia has diverse marine ecosystems, ranging from estuary, mangrove, seagrass beds, coral reefs, to deep sea, all suitable habitats for marine organisms. Many studies on the distribution of foraminifera in Indonesia waters have been conducted by the Research Center for Oceanography in Jakarta in recent years. Between 1994 and 2012 benthic foraminifera were recorded in environments ranging from estuary, mangrove, seagrass beds, coral reefs to deep sea. This study presents some of the results from several expeditions in shallow waters. Foraminifera were given special attention since there were relatively few records on the modern distribution of this group from Indonesia.Samples from estuaries contain higher numbers of agglutinated foraminifera in coarser sediments. Assemblages from near the river mouth of the Solo and Delta Porong Deltas of NE Java are dominated by Textularia spp., Haplophragmoides canariensis and Ammobaculites agglutinans. The waters of Handeuleum Islands off SW Java, with three types of ecosystems, are dominated by opportunistic benthic foraminifera, i.e. Ammonia beccarii. The most abundant benthic foraminifera are in fine sandy sediments collected adjacent to the mainland in areas characterized by coral reefs communities. Benthic foraminifera are less common in samples collected from seagrass beds with silty and muddy sediments. Coral reefs ecosystems studied at Jukung and Damar Besar Islands were dominated by symbiont-bearing foraminifera like Amphistegina, Calcarina, Heterostegina, Marginopora and Operculina.
Stacked Digital Imaging of Foraminifera Peter Lunt
Berita Sedimentologi Vol 29, No 1 (2014)
Publisher : Ikatan Ahli Geologi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1895.874 KB) | DOI: 10.51835/bsed.2014.29.1.148

Abstract

This paper describes a technique of imaging foraminifera by combining a series of digital photographs in automated software to produce a single optical image with high resolution and superior depth of focus. Results can be obtained that are nearly as good as low-power SEM images, but have the great advantage of showing the hyaline tests as they appear to the working eye under a binocular microscope, as the foraminifera do not need to be coated in gold.Digital imaging should be utilised more in documentation of foraminifera. The benefits of a low-cost and easy method of imaging include faster learning of new faunas, leading to more consistent species concepts. Workers can now publish fully illustrated works on complex morphometric series. Commercial service companies can now illustrate important taxa / faunal components and emphasise good micropalaeontological data in a way that the written word cannot.
Cover, Table of Contents, and Introduction to Volume Berita Sedimentologi
Berita Sedimentologi Vol 29, No 1 (2014)
Publisher : Ikatan Ahli Geologi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2176.31 KB) | DOI: 10.51835/bsed.2014.29.1.139

Abstract

Cover, Table of Contents, and Introduction to Volume
Recent Agglutinated Foraminiferal Trends and Assemblages of the Sedili Besar River and Its Adjacent Offshore Area, Southeastern Peninsular Malaysia Mahani Mohamed; Sanatul Salwa Hasan; Shamsudin Jirin
Berita Sedimentologi Vol 29, No 1 (2014)
Publisher : Ikatan Ahli Geologi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2076.539 KB) | DOI: 10.51835/bsed.2014.29.1.144

Abstract

The Sedili Besar River is strongly tidally influenced and its lower areas reach into a well-developed estuary. It enters the South China Sea along the wave-dominated southeastern coast of the Malay Peninsula. A total of 103 surface sediment and 48 shallow core samples from the tidal part of the river and the adjacent offshore area of Jason Bay were studied for Recent foraminiferal assemblages. The distribution of the agglutinated foraminifera shows abundance trends from the river estuary to the shallow marine offshore. Calcareous forms increase with water depth, but agglutinated foraminifera show a reverse trend.Five biofacies zones can be differentiated based on the abundance and species diversity of the dominant agglutinated foraminifera. These coincide with the upper brackish intertidal, lower brackish intertidal, estuary mouth, beach/nearshore and inner shelf depositional settings. Identification of the assemblages within the rock record from the Malay Basin and elsewhere will help considerably in a more precise characterization of the paleoenvironments of hydrocarbon reservoir intervals.

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