*Devers The 95 % of the materials that form the south beaches of *Menorca *s? Of animal origin and no derived of the *erosi? of the rocks, how accustoms to believe. These data @refor?ar still *m? The amount?*cia Of the *praderies of *posid?*ia, *at? how *alberguen Big part of the fauna that *despr? Turn into? sand.

These and of other very interesting @informaci? formed part of the talk that yesterday offered the *ge?*raf Rafel *Quintana during the *excursi? that the *GOB organized for the ravine of *Binigaus.

Some 80 people took part to the last *excursi? of the present course of the program On foot for *Menorca, that organize jointly the Department of Culture of the Insular Council and the *GOB. Massed to the centre of the village *des Big Midday, under a sky that expected to finish the *excursi? to initiate the rain, the *excursionistes went going down for the? *cam that happens edge the vineyard of the doctor Countrysides and for the *magn?*ica Room *hip?*tila Of *Binigaus Nine. For the *cam? It admired the own landscape of ravine, with *vegetaci? abundant and constant songs of birds. The ancient *aljubs, witnesses of the popular engineering, still do his *funci? of collection of water of rain.

Reached the part of low, did a stop for *reposar @for?a and listen the *novedoses @explicaci? of Rafel *Quintana in? *relaci to the origin of the beaches of the island. To lack of the *aports of sediments of important rivers, that *abasteixen the littoral of the *Pen?*sula, to *Menorca the beaches form to a large extent in the *praderies of *posid?*ia. It loves that the origin *biol?*ic Provides the 70 % of the sand of the north beaches and the 95 % of the ones of the south.

Still there was time *perqu? the *m? Fearless went to visit the spectacular Cave of the Pigeons, in the *ramal of levanter of the ravine. The rest opted for *gaudir of the forest and the next beach, where went back to joint all the participants to walk for the littoral until Saint Tom?, where a service of bus returned everybody to the village *des Midday.

On foot for *Menorca rests during the July and the August. Initiate? the nine course the September, with a *excursi? nocturnal.