TY - JOUR T1 - Dating Borneo’s Deltaic Deluge: Middle Miocene progradation of the Mahakam Delta JF - Palaios Y1 - In Press A1 - Nathan Marshall A1 - Vibor Novak A1 - Irfan Cibaj A1 - Wouter Krijgsman A1 - Willem Renema A1 - Jeremy Young A1 - Nicholas Fraser A1 - Alexander Limbong A1 - Morley, Robert J. ER - TY - JOUR T1 - Larger foraminifera as environmental discriminators in Miocene mixed carbonate-siliciclastic systems JF - Palaios Y1 - In Press A1 - Vibor Novak A1 - Willem Renema ER - TY - JOUR T1 - Paleoecological significance of stable isotope ratios in Miocene tropical shallow marine habitats (Indonesia) JF - Palaios Y1 - In Press A1 - Sonja Reich A1 - Viola Warter A1 - Frank P. Wesselingh A1 - H. Zwaan A1 - Willem Renema A1 - Lucas Lourens ER - TY - JOUR T1 - Late Miocene seasonal to sub-decadal climate variability in the Indo-West Pacific (East Kalimantan, Indonesia) preserved in giant clams JF - Palaios Y1 - In Press A1 - Viola Warter A1 - Wolfgang Müller A1 - Frank P. Wesselingh A1 - Jonathon A. Todd A1 - Willem Renema ER - TY - JOUR T1 - Coralline Algae from the Miocene Mahakam Delta (East Kalimantan, SE Asia) JF - Palaios Y1 - In Press A1 - Anja Rösler A1 - Vedrana Pretković A1 - Vibor Novak A1 - Willem Renema A1 - Juan C. Braga AB -

Miocene crustose coralline algae (CCA) from the South East Asia are poorly known, although the Miocene is the epoch of the onset of the biodiversity hotspot in the region and CCA are crucial to understand the evolutionary history of reef building. To fill this knowledge gap, CCA from Lower and Middle Miocene reefs and related carbonates in the Kutai Basin in East Kalimantan (Borneo, Indonesia) have been studied. The Kutai Basin was dominated by siliciclastic sediments of the Proto-Mahakam delta and only locally carbonate buildups occur laterally to or within the deltaic succession. CCA in the Kutai Basin occur in low-energy shallow-water platform carbonates and in association with coral reefs, encrusting the corals or bioclasts. Two main CCA assemblages have been recognized: 1) A shallow-water assemblage (S-assemblage), dominated by Neogoniolithon spp., thick crusts of Spongites spp., and Hydrolithon spp.; and 2) the D-assemblage, mainly consisting of thin crusts of Lithothamnion spp., Mesophyllum spp., and Sporolithon spp., which grew in darker waters. Light reduction in reefs in the Proto-Mahakam delta was due to increased water depth or higher turbidity by higher siliciclastic input. Assemblages with intermediate composition (I-assemblages) can also be found. Common CCA with large cells fusions and groups of heterocysts, typical features of modern reef CCA, in the S-assemblages in the Middle Miocene of East Kalimantan reflect the initiation of the reef-building CCA flora in the Indo-Pacific region. The occurrence of this kind of CCA confirms the biogeographic differentiation of a tropical reef flora.

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