Shankarpur, the solitary beach, 10 km from Digha, is a fishing harbour and is the least crowded beach of the region. The beach lined with casuarina plantations has every comfort you expect from a virgin beach. It is defined as the beach in the sense geomorphological area coastal sandy overlooking a marine or lacustrine basin, characterized by an inclination towards the basin itself and between the lower limit and the upper limit of the action of the waves. In the sense sedimentological, a beach is a sedimentary body sandy, pebbly, more rarely silty clay or accumulated reworked by waves.
The formation of a beach is due to a combination of phenomena of erosion and sedimentation, as determined by the waves, the tides and the currents coastal marine or lacustrine; the sediment redistributed by all these agents derives in most cases from contributions from river deltas or coasts neighbors. In some cases, the beaches are composed of materials present on site and reworked by waves and currents.
In areas of carbonate deposition, with a high biological productivity may also have beaches consist mainly of debris formed from the remains or calcareous skeletons of marine organisms, such as spines of sea urchins, coral and bryozoan fragments, fragments of mollusc shells and oolites.
Depending on the type of sediment available, materials of different particle size can accumulate on the beaches, ranging from gravel and pebbles where the energy of the medium is greater, in the sand for the large majority of the beaches, up to the mud, especially at the mouth of large rivers carrying large amounts of very fine sediments such as the Mississippi.
The beaches can set itself directly at the edge of the mainland or on a sandbar beach-barrier. In the latter case, the beach towards the sea bordering a protected environment a lagoon or a tidal flat.