Trésors de galets. Sans dénouer le cordon.

La pointe du Hourdel est un cordon de galets sans cesse déplacé par la mer.
Cette zone de la baie de Somme abrite aussi
la plus grande colonie de phoques" Veaux Marins" de France. 

 
Les galets ( formés de silice ) sont utilisés pour le béton,
 les abrasifs et pour malaxer et enrichir en silice la pâte à porcelaine. 
 

Certains galets contiennent de la calcédoine diversement colorée.


Des oursins fossilisés sont aussi frequement trouvés mais ils sont usés.











  Et le phare veille sur ses trésors, alors soyez attentifs!!

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