Tectono-sedimentary evolution of the western Corinth rift (Central Greece)

International audienceThe Corinth rift (Greece) is one of the world's most active rifts. The early Plio-Pleistocene rift is preserved in the northern Peloponnese peninsula, south of the active Corinth rift. Although chronostratigraphic resolution is limited, new structural, stratigraphic and sedimentological data for an area >400 km2 record early rift evolution in three phases separated by distinct episodes of extension rate acceleration and northward fault migration associated with major erosion. Minimum total NS extension is estimated at 6.47.7 km. The earliest asymmetrical, broad rift accommodated slow extension (0.61 mm a-1) over >3 Myrs and closed to the west. North-dipping faults with throws of 10002200 m defined narrow blocks (47 km) with little footwall relief. A N-NE flowing antecedent river system infilled significant inherited relief (Lower group). In the earliest Pleistocene, significant fluvial incision coincided with a 15 km northward rift margin migration. Extension rates increased to 22.5 mm a-1. The antecedent rivers then built giant Gilbert-type fan deltas (Middle group) north into a deepening lacustrine/marine basin. N-dipping, basin margin faults accommodated throws