Evidence of a Mid-Late Holocene seismic event from Dhadhar river basin, Gujarat alluvial plain, western India

摘要

Soft-sediment deformation structures have developed in a major slump at Itola in the Dhadhar river basin of Gujarat alluvial plain. The slump plane,parallels the active Dhadhar. lineament. Pseudonodules, pinching and folding, convolute folds, concave-up paths, clay diapirs, flamed convolutions, and minor faults are the major deformational structures identified. Radio-carbon dating of an associated charcoal layer has given a. maximum age of 5570 +/- 30 yr BP. The soft-sediment deformation structures conform to the criteria for attributing them to a seismic event during Mid-Late Holocene.