Insolation-paced sea level and sediment flux during the early Pleistocene in Southeast Asia

Romain Vaucher - University of Lausanne

Global marine archives from the early Pleistocene suggest that glacial-interglacial cycles, and their corresponding sea-level cycles, have predominantly a periodicity of ~ 41 kyrs driven by Earth’s obliquity. However, in Taiwan, clastic shallow-marine strata from the early Pleistocene challenge the idea of a “41-kyr world”. The studied strata revealed precession-dominated sea-level fluctuations during the early Pleistocene, independent of a global ice-volume proxy. Preservation of this signal is possible due to the high-accommodation creation and high-sedimentation rate in the basin, enhancing the completeness of the stratigraphic record.