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Pictures displaying the Margin Erosion Surface onshore. A. The Northeastern part of Ibiza Island. A-1: Map showing extension of U4 Plio-Pleistocene unit infilling the Messinian valleys (DEM of present-day topography). A-2: Incision of the MES in U1 and U2 Miocene units at Portinatx (Ibiza Island), showing a small valley filled with Pliocene deposits (location on map 4A-1). A-3: Close-up view of MES in Portinax. A-4: MES incising Mesozoic rocks (black star located on map 4A-1). B. Orosei, Central Eastern Sardinia. B-1: Schematic geological map of the Orosei area with the location of marine Pliocene outcrops (modified from Beccaluva et al., 1983) and location of the MSC valley. B-2a: Chiesa Site (location on map 4B-1): graded beds of poorly sorted torrential deposits on top of the granitic basement (granite covered by a layer of chaotic granitic angular blocks from rock avalanches). Black dashed line: unconformity between Paleozoic basement and Miocene continental deposits (Alpine-Pyrenean unconformity). B-2b: Miocene continental deposits are incised by an erosional surface that is covered by Pliocene marine deposits. This erosional surface is therefore attributed to the MES (in red). B-3: Fiuli Site (location on map 4B-1): Pliocene shallow marine sandy sediments resting in unconformity on top of the pre-Neogene basement (Red line: MES). B-4: View of the MES (red line) below Pliocene marine deposits at Onifai Site (location on map 4B-1).
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