Chesil Beach (United Kingdom)
Chesil Beach is 18 miles (28 kilometres) long and, on average, 160 metres wide and rises to 15 metres in height. It is a pebble and shingle tombolo connecting Portland to Abbotsbury and then continuing north-westwards to West Bay near Bridport. It is the largest tombolo in the UK.
The pebbles are graded in size from fist-sized near Portland to pea-sized at Bridport. The pebbles are mainly a mix of flint and chert, with some quartzite pebbles from Buddleigh Salterton.