Etude d'un karst calcaire littoral méditerranéen. Exemple du littoral de Nice à Menton

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Abstract
The French Riviera is adorned by three capes which point towards the sea and show on their coast low platforms carved in limestone (3-4 m above sea-level). These are hardly attacked into coastal karsts which show strickingly hackly surfaces, little pools and, sometimes, a notch (a few cm above mean sea level). A two meters wide platform always swashed is often observed. These forms are little but well dra- wed up : this is a «dwarf coastal karst». Many measures of pH and Alcali nit y had been done but no diurnal cycle had been observed. It seems impossible to generalize EMERY's results to anon-tidal sea as West Mediterranean sea. So the famous limestone dissolution problem must be studied on these coasts again. However, the limestone surface zonationis easily explained by biological weathering. Several research workers of Endoume Marine Station have shown that biological erosion is active and that undercutted edges of flat pools can be explained by differencial corrosion processus owing to some species of Entophysalis algae.

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