European Arid Anomaly explained with southward drift of Eurasia during
the Late Jurassic Polar Shift
Abstract
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The sedimentary successions of several basins of Europe show evidence of
widespread Late Jurassic aridification that is considered a
long-standing conundrum in paleoclimate modeling. The distinctive
feature of this event is that it appears concentrated in a discrete time
interval between the Kimmeridgian (Late Jurassic) and the Berriasian
(Early Cretaceous), and that it extended to eastern and southern-central
Asia for a total of ~10Mkm2 in roughly the same time
interval. Climate modeling has not provided a convincing explanation for
this event. We compiled and reviewed paleomagnetic data from several
continents including Adria, the African promontory, showing that this
large-scale aridification was produced by an abrupt and transient
southward migration of Eurasia towards arid tropical latitudes, while
its demise coincided with a ‘retromotion’ to more humid northern
latitudes in the Early Cretaceous. This movement is part of a global
plate motion event, most likely due to True Polar Wander, that
profoundly affected the depositional environments, the ecosystems, and
the architecture of sedimentary basins worldwide.