Sediments collected from two sites in Fishburne Creek, Dorchester County, near Charleston, South Carolina, suspected to have been affected by seismically induced liquefaction, were analyzed for shape variation by the Fourier Grain Shape Analysis (FGSA) technique. The results indicate that the shape variation of the samples from these sites can be defined by a four-end-member model. The feature at the first site contains a greater proportion of 5 and 6 end members (rougher grains), and the host has a maxima of 3 and 4 end members (smoother grains). The cumulative probability values obtained for these end members by Fisher's exact test, also indicate the presence of extraneous sand in the feature at the first site, further confirming the FGSA results. No discernible contrast based on shape families can be observed between the feature and the host at the second site, indicating possible absence of injected sand. The discrimination based on the shape of sand grains by the FGSA technique offers an alternative method to differentiate between liquefaction and nonliquefaction features.