Alleppey Coastal Plains are formed of Quaternary sediments. A series of dunes and ridges marking the repeated regressional and transgressional events characterize this coastal plain. Soil of the area belongs to the great group of Tropopsamments - Tropofluvents, commonly called Coastal Alluvium. Major water bearing formations are Tertiary sedimentary formations and weathered and fractured crystalline formations. The land form possesses ridge and swale topography formed in the late Quaternary geologic period.