Palaeoproterozoic sedimentary succession of the Lesser Himalaya contains soft-sedimentary deformational structures (SSDS) caused during fluidization and liquefaction induced by seismic activity. Morphologically, the SSDS are represented by convolute bedding/ lamination, ball-and-pillow, pseudonodules, and deformed cross-stratification and flame structures. After examining all other factors, it is inferred that the SSDS are the result of shocks, which can only be explained satisfactorily as triggered by earthquakes. [ABSTRACT FROM AUTHOR]