Climatic control on vegetation and sedimentary dynamics during the Miocene (Burdigalian to Langhian) in northeastern Tunisia |
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| Institution: | 1. Geophysics Section, Dept of Earth and Environmental Sciences, Ludwig-Maximilians-University Munich, D-80333 Munich, Theresienstrasse 41, Germany;2. Institute of Earth Sciences, Heidelberg Center for the Environment, Heidelberg University, D-69120 Heidelberg, Im Neuenheimer Feld 234, Germany;1. State Key Lab for Geological Processes and Mineral Resources, China University of Geosciences, Wuhan 430074, China;2. Center for Global Tectonics, China University of Geosciences, Wuhan, China;3. Xinjiang Research Center for Mineral Resources, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China |
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| Abstract: | Palynological and sedimentological analyses were performed on Miocene sediments of North-East Tunisia in order to detect the changes in depositional environments, including those linked to eustasy, along with changes in vegetation and climate. The specific integration of palynological (pollen and dinocysts) and sedimentological (including facies analysis) data indicate that shallow marine settings persisted until the early Burdigalian–Langhian, and that open marine environments developed progressively in the late Langhian. Since the early Serravallian, deltaic environments developed under a fluctuating, but predominantly warm climate. The palynological data support a subtropical climate during the Burdigalian, with tropical conditions prevailing at the Langhian–Serravallian transition. The observed high frequency values of megathermic and mega-mesothermic pollen taxa represent the vegetation response to the Miocene climatic optimum (MCO). |
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| Keywords: | Palynology Palaeoecology Miocene climatic optimum Sedimentology Mediterranean Palynologie Paléoécologie Optimum climatique du Miocène Sédimentologie Méditerranée |
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