![]() Studies have revealed that local tectonics were responsible for producing tsunamigenic events that affected the ancient port. At a distance of 7 km west of Diolkos, the ancient Lechaion port resides. The area is surrounded by a secondary faulting system that is occasionally active. In 1858, an earthquake of M = 6.5 destroyed Corinth, and, in 1928, an earthquake M = 6.3 inflicted extensive damage in Corinth and Loutraki. The area of Corinth isthmus is a tectonically active area given that, in the last 150 years, two strong seismic events have been described in historical records. That earthquake uplifted Corinth isthmus by 2 cm. During 1981, an earthquake sequence took place at the area of Loutraki as a result of the fault system of south Alkyonides. The area of Corinth isthmus has been uplifting by approximately 0.3 mm/year for the last 200 ka. After 1596 A.D., it was uplifted by 12 cm until it reached today’s condition. when the beachrock developed even closer to the present-day coastline. ![]() Consequently, a new beachrock was developed on top of the submerged Diolkos around 120 ± 14 A.D. The results showed that a beachrock slab was preserved before the construction of Diolkos below it, followed by its submergence by a co-seismic event after Diolkos abandonment during 146 B.C. ![]() We conducted detailed mapping of Diolkos beachrock using DGPS-GNSS, as well as mineralogical analysis and OSL dating of beachrock samples. In this study, we studied a beachrock from the Diolkos area (West Corinth canal, Greece) and remnants of Diolkos slipway to reconstruct the coastal evolution before Diolkos construction until today. The combination of geomorphological and archaeological sea level indicators has a significant contribution to the coastal paleogeographic reconstruction. Beachrocks are well known as significant proxies for paleoenvironmental analysis as they indicate the coastal evolution.
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