less of sea level. The ceaseless sea swell has undercut
these faces; jets of water are thrown up in many places by each wave as it
strikes blowholes worn out of the coral, depositing dunes of sand and coral
debris up to 10 m (30 ft) inland. At the southeast shore of the
island, the wearing-away has caused the formation of flat shelves, and the
entire island is honeycombed by caverns washed out by the sea. Due to this, no
source of fresh water exists on St Pierre
