Photographer's Note

The scenic cliffs of the "Calanches de Piana" are resulting of erosion and of corrosion of the different minerals composing granites. Erosional agents are most of all the rain and the wind, carrying a large quantity of salted water from the nearby sea. Granites are mainly composed by three types of minerals which are quartz, feldspars and micas. Quartz is the strongest one and is not eroded by the wind or by the rain, Feldspar is weaker and can be dissolved under some particular conditions and Micas are very weak and are very quickly destructed. This mode of differential erosion causes the destruction of the superficial part of the rocks exposed to meteorological strikes.

Les spectaculaires falaises des calanches de Piana sont le fruit de l'érosion et de la corrosion des minéraux constituant les roches granitiques. Les granits sont principalement composés de quartz (tres dur, qui ne se dissout quasiment pas), de feldspaths (plus faciles à dissoudre dans certaines consitions) et de micas (tres faciles à corroder). Ce sont généralement ces micas qui sont donc attaqués le plus vite et leur disparition cause la déstabilisation de la roches. Ce type d'érosion différentielle est à l'origine de la création des formes compliquées qu'ont aujourd'hui sous nos yeux ces superbes formations rocheuses...

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Additional Photos by Loic Bazalgette (bazal) Gold Star Critiquer/Gold Star Workshop Editor/Gold Note Writer [C: 2104 W: 106 N: 2261] (7900)
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