The beach was formed by the action of waves and longshore drift. During the last ice age, sea levels were much lower than they are today. As the ice melted, sea levels rose rapidly, and the waves began to erode the coastline. The eroded material was transported along the coast by longshore drift, and eventually deposited on the site of the present-day Chesil Beach.

The pebbles on Chesil Beach are mostly flint and chert, which are types of sedimentary rock that are very resistant to erosion. The pebbles are sorted by size, with the largest pebbles at the western end of the beach and the smallest pebbles at the eastern end. This is because the larger pebbles are more easily moved by the waves, and they tend to get washed further along the coast.

The unusual features of Chesil Beach are due to the specific conditions under which it was formed. The beach was formed during a period of rapid sea level rise, which created strong currents and waves. These currents and waves were able to transport the pebbles along the coast and deposit them in a straight line. The fact that the pebbles are sorted by size is also due to the action of the waves. The larger pebbles are more easily moved by the waves, and they tend to get washed further along the coast. The shallow lagoon behind the beach provides shelter from the waves, which helps to protect the beach from erosion.

Chesil Beach is a unique and beautiful natural feature. It is a popular tourist destination, and it is also a valuable habitat for wildlife. The beach is home to a variety of birds, including sanderlings, oystercatchers, and ringed plovers. It is also home to a number of marine animals, including crabs, lobsters, and fish.

Chesil Beach is a fragile environment, and it is important to protect it from erosion and pollution. The beach is managed by the National Trust, which works to conserve the beach and its wildlife. Visitors to the beach are asked to stay on the paths and to avoid disturbing the wildlife.

According to the Internet