Title strip


The Gorges d'Héric
At location 9 the road swings round to the left. On the inside of the bend we can see a familiar rock type. It is cleaved with flat surfaces with striations similar to the .1cm x 4 cm regular micro folds of location 1.

Photo close up schist

close up of the crenulations


photo of Schist pocket on bend
Planar jointing and cleaved planes with crenulation folds suggest a pocket of low grade metamorphism

Size and shape
The rocks are jointed into 1-5m cubic shapes. Either these rock have been protected from the high pressures and or high temperatures suffered by the rest of the rocks, or we have passed through the High metamorphic zone to a lower one. Only an examination of the surrounding rocks can decide, and the "strain shadow" explanation seems more likely.



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