Paleoseismological analysis based on seismological data enable us to understand the recent seismic history of the Eliki fault. Along the eastern "segment (or strand)" scarp 5 trenches have been excavated (8x5x2m), their walls were mapped in scale 1:20 and further analyzed by precise tectono-stratigraphic methodology. The Kerynitis river, which crsses the Eliki fault from S to N and supplies the alluvial plain, has subsided at a rate of 1.4mm/yr. The river was running from west to east, resulting the fluvial conglomerates in the trenches, which have buried under the colluvial sediments. Based on colluvium stratigraphy, displacement of distinct horizons, deposition of sedimentary layers and C14 dating, faulting events have been identified affecting unconsolidated sediments in the trench. The penultimate 373 BC event and the two younger events with a throw of 0.93m and 1.37m respectively, the third event, with a throw of 0.44m, suggest a variable seismic history.
Palaeoseismological study of the eastern branch of Heliki fault (Corinthian gulf)
SMPORAS, Sotirios
2001
Abstract
Paleoseismological analysis based on seismological data enable us to understand the recent seismic history of the Eliki fault. Along the eastern "segment (or strand)" scarp 5 trenches have been excavated (8x5x2m), their walls were mapped in scale 1:20 and further analyzed by precise tectono-stratigraphic methodology. The Kerynitis river, which crsses the Eliki fault from S to N and supplies the alluvial plain, has subsided at a rate of 1.4mm/yr. The river was running from west to east, resulting the fluvial conglomerates in the trenches, which have buried under the colluvial sediments. Based on colluvium stratigraphy, displacement of distinct horizons, deposition of sedimentary layers and C14 dating, faulting events have been identified affecting unconsolidated sediments in the trench. The penultimate 373 BC event and the two younger events with a throw of 0.93m and 1.37m respectively, the third event, with a throw of 0.44m, suggest a variable seismic history.I documenti in SFERA sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
