The Cenozoic on-shore basins of Northern Vietnam: Biostratigraphy,vertebrate and invertebrate faunas |
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| Authors: | Madelaine Böhme Jérôme Prieto Simon Schneider Nguyen Viet Hung Do Duc Quang Dang Ngoc Tran |
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| Institution: | 1. Collage of Marine Geosciences, Key Laboratory of Submarine Geosciences and Prospecting Technology, Ocean University of China, 238 Songling Road, Qingdao 266100, PR China;2. Laboratory for Marine Geology, Qingdao National Laboratory for Marine Science and Technology (QNLM), Qingdao 266061, PR China;3. State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Wuhan 430074, PR China;4. School of Earth, Atmosphere and Environment, Monash University, Clayton, Victoria, Australia;5. Department of Earth Sciences, University of St. Andrews, Saint Andrews, UK;6. Institute of Geology and Geophysics, University of Chinese Academy of Sciences, Beijing 100029, PR China;1. Cardiovascular Research Institute, Ioannina and Athens, Greece;2. Experimental Research Center ELPEN, Pikermi, Athens, Greece |
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| Abstract: | A first account of paleontological data from three Cenozoic on-shore basins in Northern Vietnam, i.e. the Na Duong, Cao Bang, and Hang Mon basins, reveals a rich fossil fauna and flora of supposed Oligocene age, offering a great potential for taxonomic, paleoenvironmental, and paleobiogeographic studies. Two excavation campaigns unearthed well-preserved fossil remains of mammals, crocodiles, at least six turtle species, some 20 fish taxa, some other 20 mollusc species, and different plant remains. The majority of these taxa are regarded as new to science. However, close affinities to modern faunas of northern Southeast Asia demonstrate the importance of these fossils for an evaluation of the biological history of this modern biodiversity hot spot. Moreover, the fossil assemblages may help to disentangle the intricate Cenozoic tectonic evolution of Southeast Asia by application of paleobiogeographic modelling. Finally, the discovery of complex paleo-food-webs and the presence of several taxa indicative of certain ecological conditions provide a solid base for autecologic, synecologic and paleoclimatic studies. The potential biostratigraphic value of the macrofauna has to be demonstrated yet, as evolutionary concepts for most of the respective groups have not been proposed to date. |
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