S. Sartoretto, STRUCTURE AND DYNAMIC OF A NEW BIOCONSTRU CTION OF MESOPHYLLUM LICHENOIDES (ELLIS) LEMOINE (CORALLINALES, RHODOPHYTA), Comptes rendus de l'Academie des sciences. Serie 3, Sciences de la vie, 317(2), 1994, pp. 156-160
New infralittoral bioconcretions have been found in a fault of the roc
ky inlet of Gameou (La Ciotat-French mediterranean coast). This pillar
-shaped Coralligenous proceed from a ecomorphic form of Mesophyllum li
chenoides (Ellis) Lemoine to a strong hydrodynamism and a dim illumina
tion. It's building zip by the superposing of the thalli which are rei
nforced by a biophysio-chemical magnesian calcite. This compact struct
ure allowed us to determin the mean growth rate of 5 pillars by the ra
diocarbon dating method. We obtained a value equal to 0,19 mm. year-1.