Paleoclimate and extensional tectonics of short-lived lacustrine environments. Lower Cretaceous of the Panormide Southern Tethyan carbonate platform (NW Sicily)

摘要: Abstract Subaerial erosion and continental sedimentation interbedded with shallow-water carbonates are unequivocal stratigraphic records to evaluate paleoenvironmental paleoclimate evolution of emerged landmass. Stratigraphic analysis the Cretaceous Monte Gallo section Mesozoic Panormide carbonate platform, in northern side Palermo Mountains (NW Sicily) a peculiar continental-derived clays that interrupted sedimentation. These rest, lenticular geometries, above tectonically-enhanced subaerial erosional unconformity Barremian-Lower Aptian Requienid limestones covered by Upper Rudistid limestone. Sedimentological investigation combined mineralogical petrographic results reveal occurrence alkaline saline lake deposition pond-filling depositional environment recording stressed conditions (evaporation) especially its final living phase. They were formed when half graben/tilted-block tectonics produced footwall uplift faulted-blocks platform. Paleoclimate evaluations highlighted period warm-humid conditions, which favoured their formation, uniform warm climate highlighting greenhouse