Asymmetrical condition of the Bogor Basin (West Jawa, Indonesia) during the Middle Miocene to Pliocene based on taphonomic study of shellbed and its sequence architecture

Aswan, Aswan; Suparka, Emmy; Rijani, Sonia; Sundari, Dessy; Patriani, Emma Yan

doi:10.9795/bullgsj.59.319

Cited by 5 publications

(5 citation statements)

References 9 publications

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“…Facies were initially identified and characterized in the field. Mollusk fossil concentrations were classified following Kondo et al (1998) and Aswan (2006), considering their stratigraphy, inferred histories of accumulation, and position within the depositional sequence. Thus, several features were recorded, including stratigraphic (thickness, lateral extent, geometry, stratigraphic contacts, association with significant surfaces, and position within depositional sequence), sedimentologic (type of matrix, associ-…”

Section: Methodsmentioning

confidence: 99%

“…The Kaliwangu Formation is one of the significant accumulations of mainly Neogene shallow marine strata exposed on land but there are just a few studies about the mollusk contents such as the one written by Aswan and Zaim (1998) and Unggul (2009). The outcrops represent a critical interval and a valuable reference section (Rijani, 2009), where environmental changes and glacio-eustatic evolutions that affected this part ofWest Jawa during Pliocene can be recognized (Aswan et al, 2008).…”

Section: Introductionmentioning

confidence: 99%

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Shell Bed Identification of Kaliwangu Formation and its Sedimentary Cycle Significance, Sumedang, West Java

Aswan

Rijani

Riza

2013

Indonesian J. Geosci.

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DOI: 10.17014/ijog.v8i1.151Kaliwangu Formation cropping out around Sumedang area contains mollusk fossils dominated by gastropods and bivalves. In terms of sequence stratigraphy, each sedimentary cycle generally consists of four shell bed types: Early Transgressive Systems Tract (Early TST) deposited above an erosional surface or sequence boundary, that is characterized by shell disarticulation, trace fossils, gravelly content, no fossil orientation direction, and concretion at the bottom; Late Transgressive Systems Tract (Late TST) identified by articulated (conjoined) specimen in its life position, that shows a low level abration and fragmentation, adult specimen with complete shells, and variation of taxa; Early Highstand Systems Tract (Early HST) characterized by adult taxa that was found locally in their life position with individual articulation, juvenile specimens frequently occured; Late Highstand Systems Tract (Late HST) determined as multiple-event concentrations, disarticulated shell domination, and some carbon or amber intercalation indicating terrestrial influence. Shell bed identification done on this rock unit identified nineteen sedimentary cycles.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Shell Bed Identification of Kaliwangu Formation and its Sedimentary Cycle Significance, Sumedang, West Java

Aswan

Rijani

Riza

2013

Indonesian J. Geosci.

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“…The lower to middle part of the formation consists of dark sandy siltstone and calcareous sandstone, and contains diverse shallow marine molluscs such as conid, cerithiid and nassariid gastropods, arcid and tridacnid bivalves, and branching corals, suggesting a deposition in a tropical lower intertidal to upper sub-tidal environment (Kase et al 2015). The precise geologic age of the formation is still debated due to the scarcity of planktonic foraminifers and calcareous nannoplankton (Aswan et al, 2008). It is usually attributed to the Middle Miocene (Aswan 2006;Aswan & Osawa, 2006;Aswan et al 2008;Wilson & Hall, 2010).…”

Section: Materials and Geological Settingmentioning

confidence: 99%

“…The precise geologic age of the formation is still debated due to the scarcity of planktonic foraminifers and calcareous nannoplankton (Aswan et al, 2008). It is usually attributed to the Middle Miocene (Aswan 2006;Aswan & Osawa, 2006;Aswan et al 2008;Wilson & Hall, 2010). However according to Aswan et al (2017) and Batenburg et al (2011), the age of the Nyalindung Formation can range between the early Middle Miocene and the early Late Miocene.…”

Section: Materials and Geological Settingmentioning

confidence: 99%

Review of the paleobiogeography of Eofavartia Merle, 2002 (Gastropoda: Muricidae) with the description of a new species from the Miocene of Java (Indonesia)

Merle¹,

Landau

2020

Annales de Paléontologie

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The paleobiogeographic range of Eofavartia Merle, 2002 (Gastropoda: Muricidae) was until now restricted to the Eocene (Ypresian to Priabonian) of the North Atlantic Ocean and the genus seemed to become extinct after the Priabonian. The description of E. dharmai nov. sp. from the Middle Miocene from Java (Indonesia) reveals the persistence of Eofavartia during the Neogene in the Indo-Pacific region. In addition, the revision of three South Australian species previously attributed to Murexiella and Subpterynotus respectively: M. perculta Vokes, 1985 (Lower Miocene), S. antecedens (Ludbrook 1958) (Pliocene) and S. tatei (Verco 1895) (Recent) shows closer morphological affinities to E. dharmai nov. sp. and the European and North American Paleogene species. This generic reassignment to Eofavartia expands the range of the genus to include South Australia. The extant E. tatei represents the last member of the genus, and is herein considered a relict species of Eofavartia.

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Section: Geological Settingmentioning

confidence: 99%

Shell Bed Identification of Kaliwangu Formation and its Sedimentary Cycle Significance, Sumedang, West Java

Aswan¹,

Rijani²,

Riza³

2013

Indonesian J. Geosci.

View full text Add to dashboard Cite

Kaliwangu Formation cropping out around Sumedang area contains mollusk fossils dominated by gastropods and bivalves. In terms of sequence stratigraphy, each sedimentary cycle generally consists of four shell bed types: Early Transgressive Systems Tract (Early TST) deposited above an erosional surface or sequence boundary, that is characterized by shell disarticulation, trace fossils, gravelly content, no fossil orientation direction, and concretion at the bottom; Late Transgressive Systems Tract (Late TST) identified by articulated (conjoined) specimen in its life position, that shows a low level abration and fragmentation, adult specimen with complete shells, and variation of taxa; Early Highstand Systems Tract (Early HST) characterized by adult taxa that was found locally in their life position with individual articulation, juvenile specimens frequently occured; Late Highstand Systems Tract (Late HST) determined as multiple-event concentrations, disarticulated shell domination, and some carbon or amber intercalation indicating terrestrial influence. Shell bed identification done on this rock unit identified nineteen sedimentary cycles.

show abstract

Asymmetrical condition of the Bogor Basin (West Jawa, Indonesia) during the Middle Miocene to Pliocene based on taphonomic study of shellbed and its sequence architecture

Cited by 5 publications

References 9 publications

Shell Bed Identification of Kaliwangu Formation and its Sedimentary Cycle Significance, Sumedang, West Java

Shell Bed Identification of Kaliwangu Formation and its Sedimentary Cycle Significance, Sumedang, West Java

Review of the paleobiogeography of Eofavartia Merle, 2002 (Gastropoda: Muricidae) with the description of a new species from the Miocene of Java (Indonesia)

Shell Bed Identification of Kaliwangu Formation and its Sedimentary Cycle Significance, Sumedang, West Java

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