Site du Gouffre de Castel Meur

A jagged shoreline, fringed with reefs and bristling with rocky knolls - this is the surprising sight that surrounds the Gouffre site.

Over time, the landscape has been gradually transformed. Complex swell phenomena have led to accumulations of pebbles that have lengthened to form tombolos.

Tombolos are transverse strings of pebbles linking land to islets.

At the Plougrescant site, a system of three pebble cords encloses two brackish-water lagoons. These lagoons, which communicate with the marine environment via the pebble strips, are of great botanical interest.

Erosion affects rocks differently, depending on their composition. Here, granite is less degraded, forming rocky heaps known as granite chaos.