TY - JOUR T1 - A diverse patch reef from turbid habitats in the Middle Miocene (East Kalimantan, Indonesia) JF - Palaios Y1 - Submitted A1 - Nadiezhda Santodomingo A1 - Vibor Novak A1 - Vedrana Pretković A1 - Nathan Marshall A1 - Anja Rösler A1 - Emanuela Di Martino A1 - Elena LoGiudice A1 - Sonja Reich A1 - Juan Carlos Braga A1 - Willem Renema A1 - Kenneth G. Johnson ER - TY - JOUR T1 - Environmental reconstruction of a late Burdigalian (Miocene) patch reef in deltaic deposits (East Kalimantan, Indonesia) JF - Palaeogeography, Palaeoclimatology, Palaeoecology Y1 - 2013 DO - http://dx.doi.org/10.1016/j.palaeo.2013.01.009 A1 - Vibor Novak A1 - Nadiezhda Santodomingo A1 - Anja Rösler A1 - Emanuela Di Martino A1 - Juan Carlos Braga A1 - Paul D Taylor A1 - Kenneth G. Johnson A1 - Willem Renema SP - 110 EP - 122 AB -

Most studies of Cenozoic shallow-water, mixed carbonate-siliciclastic depositional systems have focused on their sedimentology. To date, however, comprehensive analyses of biotas and biofacies of Indo-West Pacific reefs that developed in mixed carbonate-siliciclastic systems are lacking. This study describes the palaeoenvironment and biodiversity of a late Burdigalian patch reef that developed in a mixed carbonate-siliciclastic depositional system. The studied exposure is located at the northeast margin of the Kutai Basin near Bontang (Indonesia), and is approximately 80 m wide and 25 m thick. Multi-taxon analysis of the most abundant fossil groups, including larger benthic foraminifera, corals, coralline algae, and bryozoans, aims to provide a model for environmental interpretation that will allow comparison with similar deposits of Indo-West Pacific region. Based on fossil content and lithology, five different facies types have been distinguished: foraminiferal packstone (FP), bioclastic packstone with foralgal communities (BP), thin-platy coral sheetstone (CS), platy-tabular coral platestone (CP), and shales (S). Among larger benthic foraminifera, smaller and more robust forms dominate in the FP and BP facies, while larger and flatter forms are the most abundant in the CS and CP facies. Thin-platy corals are dominant in the CS facies and gradually change into thicker platy-tabular forms in the CP facies. Assemblages and growth forms of coralline algae show no major differences between the facies types and are dominated by melobesioids and Sporolithon. The majority of bryozoan species are encrusting and were found only in the CS facies. Light-dependent organisms occurring in the reef indicate low light conditions typical for mesophotic reefs. The relatively small size of this reef complex and quite distinct vertical changes in the facies types, combined with the high siliciclastic content in most of the units, points to strong terrigenous input affecting water transparency as the main factor controlling the reef growth.

VL - 374 ER - TY - CONF T1 - Larger benthic foraminifera – faunal pioneers in mixed carbonate-siliciclastic systems T2 - 2012 GSA Annual Meeting Y1 - 2012 A1 - Vibor Novak A1 - Nadiezhda Santodomingo A1 - Willem Renema AB - Larger benthic foraminifera are one of the most abundant and widespread organisms in shallow marine tropical environments. Their role as rapid colonizers of new substrates has been suggested, but little is still known to support this idea. To address this question, larger benthic foraminifera assemblages have been studied in the paleoenvironmental reconstruction of a Langhian (Middle Miocene) shallow-water patch reef, as part of a broader multitaxon fossil comunity analysis, including corals, coralline algae, and bryozoans. The studied outcrop (approx. 80 m wide and 25 m thick) is located at the northeast margin of the Kutai Basin near Bontang (Indonesia). The patch-reef was developed in mixed carbonate-siliciclastic depositional environment and despite the high terrigenous input affecting water transparency, this reef contains a diverse marine biota. Five different facies types were distinguished based on lithology and fossil content: foraminifera packstone, bioclastic packstone with foralgal communities, thin-platy coral sheetstone, platy-tabular coral platestone, and shales. Excluding the fossil barren shales facies, only larger benthic foraminifera occur in all four remaining facies types, showing the ability to rapidly adapt to changes in environment. In the current study, high siliciclastic input caused fluctuations in light levels, but also resulted in deposition of soft-bottom substrate. In newly developed conditions, the larger benthic foraminifera appear first and mark the initiation of reef growth. The persistence of LBF throughout the fossil reef succession indicates their high tolerance to terrigenous input and also highlight the role of foraminifera as primary colonizers, proving themselves as important faunal pioneers, particularly in mixed carbonate-siliciclastic systems. JF - 2012 GSA Annual Meeting CY - Charlotte, NC ER - TY - JOUR T1 - Development of a turbid reef in the Middle Miocene (East Kalimantan, Indonesia) JF - Geological Society of America Abstracts with Programs Y1 - 2012 A1 - Nadiezhda Santodomingo A1 - Vibor Novak A1 - Nathan Marshall A1 - Emanuela Di Martino A1 - Nicholas Fraser A1 - Elena LoGiudice A1 - Vedrana Pretković A1 - Anja Rösler A1 - Willem Renema A1 - Kenneth G. Johnson SP - 623 KW - INDONESIA KW - marginal ecosystems KW - Miocene KW - palaeonvironmental reconstruction KW - patch reefs CY - Charlotte, North Carolina, USA VL - 77 UR - https://gsa.confex.com/gsa/2012AM/webprogram/Paper209284.html IS - 7 ER - TY - CONF T1 - Palaeoenvironmental reconstruction of a Miocene patch reef in East Kalimantan (Indonesia): a close-up on the bryozoan component T2 - IBA Larwood Meeting Y1 - 2012 A1 - Emanuela Di Martino A1 - Paul D. Taylor A1 - Vibor Novak A1 - Nadiezhda Santodomingo A1 - Anja Rösler A1 - Juan Carlos Braga A1 - Kenneth G. Johnson A1 - Willem Renema JF - IBA Larwood Meeting CY - Brno Czech Republic ER - TY - CONF T1 - Environmental reconstruction of a Langhian patch reef (East Kalimantan, Indonesia) T2 - Lyell Meeting 2012 Y1 - 2012 A1 - Vibor Novak A1 - Nadiezhda Santodomingo A1 - Anja Rösler A1 - Emanuela Di Martino A1 - Juan C. Braga A1 - Paul D Taylor A1 - Kenneth G. Johnson A1 - Willem Renema JF - Lyell Meeting 2012 ER - TY - CONF T1 - Bryozoans from a Langhian patch reef in East Kalimantan (Indonesia) T2 - Giornate di Paleontologia XII edizione – Catania, 24-26 Maggio 2012 Y1 - 2012 A1 - Emanuela Di Martino A1 - Paul D. Taylor A1 - Vibor Novak A1 - Nadiezhda Santodomingo A1 - Anja Rösler A1 - Juan Carlos Braga A1 - Kenneth G. Johnson A1 - Willem Renema JF - Giornate di Paleontologia XII edizione – Catania, 24-26 Maggio 2012 CY - Catania, Italy ER -