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Berita Sedimentologi

FOSI
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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 9 Documents

Search results for , issue "Vol 25, No 1 (2012)" : 9 Documents clear

New Look at the Origin of the Sumba Terrane: Multidisiplinary Approaches Satyana, Awang H.; Purwaningsih, Margaretha E. M.
Berita Sedimentologi Vol 25, No 1 (2012)
Publisher : Ikatan Ahli Geologi Indonesia

Sumba Island belongs to the Lesser Sunda Islands Group. Geologically, the island is located in a forearc setting in front of the Quaternary Sunda-Banda volcanic arcs, which comprise the islands of Bali-Lombok-Sumbawa-Flores-Alor and Wetar. Sumba Island is presently non-volcanic and is tectonically important since it is located at the border of subduction and collision zones. To the west of Sumba, oceanic crust of the Indian Ocean is being subducted beneath the Sunda Arc. To the east of Sumba, there is collision zone where Australian continental crust underthrusts Timor Island.Based on tectonic studies, Sumba has been considered as a micro-continent or continental fragment/ sliver which detached itself from its provenance and was transported to its present position as an exotic terrane. Gravity data show that Sumba has a gravity anomaly of +160 to +200 mgal and is underlain by continental crust with a thickness of 24 km.The pre-Tertiary basement of Sumba reveals faulting with rifted blocks. Overlying this are Late Cretaceous-Paleocene marine turbidites of the Lasipu Formation. This period is accompanied by two major calc-alkaline magmatic episodes, the Santonian-Campanian episode (86-77 Ma) and the Maastrichtian-Thanetian one (71-56 Ma). Overlying these are volcaniclastic and neritic sediments accompanied by volcanic rocks belonging to theLutetian-Rupelian Paumbapa Formation (42-31 Ma). The Neogene rocks are composed of widespread transgressive and turbiditic chalky sediments of the Kananggar/Sumba Formation, which contain reworked volcanic materials. Synsedimentary tectonism with normal faulting and largescale slumping occurred during the Neogene. The Quaternary rocks are coral reefs, uplifted to form terraces.

A Report from SEAPEX Evening Talk in Bangkok: Current Understanding of Sundaland Tectonics Minarwan, Minarwan
Berita Sedimentologi Vol 25, No 1 (2012)
Publisher : Ikatan Ahli Geologi Indonesia

Sundaland, the so called "craton‟ and "stable‟ core of SE Asia, may not be a real craton after all. New granite zircon dating, seismic tomography and heat flow data from the region all point towards relatively young, hot, heterogeneously assembled and easily deformed lithosphere with only local strong crusts. Ongoing research undertaken by Prof. Robert Hall and his team in the Southeast Asia Research Group (SEARG) of Royal Holloway, University of London (UK) shows strong evidences to argue that Sundaland is not a craton and neither are its characteristics similar to well-known cratons such Wyoming (US) and Gawler (South Australia). Their findings were presented by Prof. Hall in a recent SEAPEX Evening Talk that took place on the 31st of July 2012 in Bangkok, Thailand.

Short Communication: No Jurassic Sediments on Sumba Island? van Gorsel, J.T. (Han)
Berita Sedimentologi Vol 25, No 1 (2012)
Publisher : Ikatan Ahli Geologi Indonesia

Roggeveen (1929) described a small ammonite fragment from SW Sumba Island, provisionally identified as a Middle Jurassic species. It is associated with Inoceramus-type bivalves. The presence of Jurassic age sediments within the intensely deformed Mesozoic section of Sumba was accepted by some authors and this presence of Jurassic ammonites and bivalves was used to support the presence of Australian continental basement crust on Sumba and South Sulawesi.However, subsequent workers on the geology of Sumba have been unable to find additional fossil evidence for the presence of Jurassic sediments on Sumba; the oldest rocks that could be reliably dated are of Late Cretaceous age.Three ammonite specialists were consulted to check the identification of the ammonite illustrated from Sumba by Roggeveen (1929). They concluded that the fragment could not be reliably identified and could well be a Cretaceous species, and also suggested that the associated Inoceramus looked like Cretaceous species. There is therefore no reliable evidence for the presence of any rocks older than Late Cretaceous on Sumba, and it remains to be demonstrated whether basement of Sumba contains any Australia-derived continental material.

Bali–Lombok Gap: A Distinct Geo-Biologic Border of the Wallace Line Satyana, Awang H.
Berita Sedimentologi Vol 25, No 1 (2012)
Publisher : Ikatan Ahli Geologi Indonesia

The "Wallace Line", a line that divides faunal distribution, came into being in 1863 and was named after Alfred Russell Wallace, the great English naturalist travelling the "Malay archipelago‟ or the Indonesian islands from 1854-1862. The Wallace Line separates the Oriental (Asian) fauna to the west from the Australasian fauna to the east. The original Wallace Line ran between Bali and Lombok, extending northward between Borneo/Kalimantan and Sulawesi, and between the Philippines and Indonesia. The Asian animal community includes such mammals as rhinoceroses, orang-utans, tapirs, tigers, and elephants. Animals related to Australian fauna include birds such as cockatoos, birds of paradise, marsupials and cuscuses.

Short Note: Sedimentology of Bali Touristic Locations - Tanah Lot and Uluwatu Darman, Herman
Berita Sedimentologi Vol 25, No 1 (2012)
Publisher : Ikatan Ahli Geologi Indonesia

Tanah Lot and Uluwatu are famous touristic sites in the southern part of Bali, and part of the Sunda Volcanic Arc. Most visitors come to these places to enjoy the scenery and visit the temple. The uniquity of these sites, however, is the result of the specific local geological setting in which they are located.The Tanah Lot temple was built on top of Quarternary volcanic clastic deposits, and was separated from the main island because of erosional processes. Uluwatu which is well known for the temple was built on a Miocene limestone cliff. Due to the excellent exposure of the geology, both localities allow for studying the sedimentary history which has resulted in these remarkable sites.This article discusses the stratigraphy and sedimentological features seen on these two locations. Despite the excellent exposure, both locations have received very little attention and only few studies have been reported. Both sites but especially the Uluwatu cliff, provides an excellent lateral exposure, allowing to discuss the depositional in a spatial framework. The outcrops in both locations show close relationship between volcanic activity and carbonate deposition.

Tectonic Models of the Lesser Sunda Islands Minarwan, Minarwan
Berita Sedimentologi Vol 25, No 1 (2012)
Publisher : Ikatan Ahli Geologi Indonesia

The Lesser Sunda Islands or "Nusa Tenggara‟ as they are known in Indonesia, are a group of islands located to the immediate east of Java and to the north of Western Australia. Major islands in the group include Bali, Lombok, Sumbawa, Flores, Sumba and Timor. Most of the islands, except for Sumba and Timor, contain active volcanoes and are volcanic in origin. The volcanic islands are aligned in a W to E direction, forming the magmatic arc that constitutes the East Sunda-Banda Arc. Sumba and Timor are located to the south of the volcanic chain and they form the southern part of Banda Arc.The East Sunda Arc includes Bali, Lombok and Sumbawa. Flores, which is the next island located to the east of Sumbawa, is the beginning of the Banda Arc. The Banda Arc itself is subdivided into the volcanic inner Banda Arc that includes Flores, Alor, Wetar, and other smaller volcanic islands to the northeast of Wetar; and the non-volcanic outer Banda Arc that includes islands such as Sumba, Timor, Babar, Tanimbar and Kai. The boundary between the East Sunda and Banda Arcs coincides with a change in present-day relationship of Australia-Eurasia plates, from an oceanic subduction type to continental collision type. In the inner Banda Arc, no active volcanic activities currently exist in the Alor, Lirang and Wetar islands.This article summarizes the tectonic models of the Lesser Sunda Islands, particularly of the area between Java and the Timor islands. The summary is based on various publications of several key researchers, who have used their own findings and also those of other authors to propose their interpretation. The objective of this article is to review current understanding and interpretation of crust composition, tectonic models and arc volcanism of the region.

Short Note: Well Rounded Kuta and Tanjung Aan Lombok Beach Sand Koesoemadinata, R.P.; van Gorsel, J.T.; Darman, Herman
Berita Sedimentologi Vol 25, No 1 (2012)
Publisher : Ikatan Ahli Geologi Indonesia

Coarse, well rounded carbonate sand grains are found in Kuta and Tanjung Aan beach Lombok. These kinds of sands are also common on Sanur Beach and other localities along the East coast of Bali, where many visitors believed them to be ooids (oolites). The grains are generally about 3-4 mm in diameter and well rounded. The colors of the grains are white to light-brownish white. In places they are mixed with coral remain and other small shells which are angular to sub-angular or sub-rounded to oval shape, with generally the same grain size or larger.

Seismic Expression of Tectonic Features in the Lesser Sunda Islands, Indonesia Darman, Herman
Berita Sedimentologi Vol 25, No 1 (2012)
Publisher : Ikatan Ahli Geologi Indonesia

The Sunda Arc is a chain of islands in the southern part of Indonesia, cored by active volcanoes. The western part of the Sunda arc is dominated by the large of Sumatra and Java, and is commonly called "the Greater Sunda Islands‟. The tectonic terrain within this part is dominated by the oceanic subduction below the southeastern extension of the Asian continental plate, which is collectively known as the Sunda Shield, Sunda Plate or Sundaland. Towards the east the islands are much smaller and are called "the Lesser Sunda Islands‟. The transition from oceanic subduction to continent-island arc collision developed in this area, while further west the Banda Arc marks full continent to island arc collision between Australia and the Asian plate. The Australian lithosphere, which is interpreted as Precambrian continental crust is moving northward at a rate that currently varies from 6.7 to 7 cm/year.The Sunda Arc has long been considered as a classical accretionary margin system where the Indo-Australian oceanic plate is underthrust beneath the Asian Continent, active since the Late Oligocene. At the eastern end of the Sunda Arc the convergent system changes from oceanic subduction to continent island arc collision of the Scott Plateau, part of the Australian continent, colliding with the Banda island arc and Sumba Island in between.The Lesser Sunda Islands are also called the inner-arc islands. The formation of these islands is related to the subduction along the Java Trench in the Java Sea. The island of Bali marks the west end of the Lesser Sunda Islands and Alor Island at the east end. To the south of the inner-arc islands, an accretionary wedge formed the outer-arc ridge. The ridge is subaerially exposed in the east as Savu and Timor Island. The northwest of the Lesser Sunda Islands are underlain by a Late Cretaceous Accretionary Crust, which changes to an oceanic crust in the northeast. The Sumba Island has a unique orientation and the origin of the island is still debated.The aim of this article is to provide a broad overview about the structures of the tectonic units based on some selected seismic lines. These lines also give a better geological understanding, including recent processes that developed in the area.

Volcano Tourism of Mt. Rinjani in West Nusa Tenggara Province, Indonesia: a Volcanological and Ecotourism Perspective Rachmat, Heryadi
Berita Sedimentologi Vol 25, No 1 (2012)
Publisher : Ikatan Ahli Geologi Indonesia

Indonesia has nearly 500 volcanoes and 129 of them are currently active. The active volcanoes are spread out along a 7000 km volcanic belt from Sumatra to Java, Bali, Nusa Tenggara, Banda, Halmahera and Sulawesi. Each volcano possesses its own natural characteristics that usually include beautiful landscapes and sceneries, fresh air and fertile lands. One of the volcanoes is Mount (Mt.) Rinjani (+3726 m) in Lombok island, West Nusa Tenggara. It is the second highest volcano in Indonesia after Mt. Kerinci (+3800 m) in Sumatra. Mt. Rinjani is situated at latitude 8°25' S and longitude 116°28' E. The Rinjani volcano complex has potential to be developed for volcano tourism and natural volcanic museum.Currently, vulcano tourism in Indonesia is still poorly developed and it relies on resources-based tourism only, not on knowledge-based tourism. Now is the moment for volcano tourism stakeholders, including travel guides, to prepare themselves by gaining more knowledge, specifically in term of scientific knowledge of a volcano and its environment. By doing so, they can make volcano more interesting as a tourist attraction and more appealing to both domestic and foreign tourists. The tourists eventually can have better understanding of a volcano including the landscapes, sceneries and panoramas, calderas, lakes, hotsprings, waterfalls, caves, etc.This paper discusses the volcano-tourism potential of Mt. Rinjani, focusing on volcanic and geological aspects as the main tourist attraction, and environmental aspect as a secondary attraction. The volcano-tourism attractions can include specific or general activities, depending on a visitor's interest, for examples for recreation, adventure or cultural activities.

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Minarwan

Contact Email
minarwanx@gmail.com

Phone
+6281908602813

Journal Mail Official
bs.fosi@gmail.com

Editorial Address
Forum Sedimentologiwan Indonesia (FOSI) Komisi Sedimentologi Ikatan Ahli Geologi Indonesia (IAGI) Jl. Ciledug Raya Kav. 109 Cipulir, Kebayoran Lama, Jakarta Selatan, Indonesia

Location
Kota adm. jakarta selatan,

Dki jakarta

INDONESIA

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Home Page

OAI Link

Editorial Team

Contact

Reviewer

Google Scholar

Contact Name Minarwan

Contact Email minarwanx@gmail.com

Phone +6281908602813

Journal Mail Official bs.fosi@gmail.com

Editorial Address Forum Sedimentologiwan Indonesia (FOSI) Komisi Sedimentologi Ikatan Ahli Geologi Indonesia (IAGI) Jl. Ciledug Raya Kav. 109 Cipulir, Kebayoran Lama, Jakarta Selatan, Indonesia

Location Kota adm. jakarta selatan, Dki jakarta INDONESIA

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Contact Name
Minarwan

Contact Email
minarwanx@gmail.com

Phone
+6281908602813

Journal Mail Official
bs.fosi@gmail.com

Editorial Address
Forum Sedimentologiwan Indonesia (FOSI) Komisi Sedimentologi Ikatan Ahli Geologi Indonesia (IAGI) Jl. Ciledug Raya Kav. 109 Cipulir, Kebayoran Lama, Jakarta Selatan, Indonesia

Location
Kota adm. jakarta selatan,

Dki jakarta

INDONESIA