While descending towards the mouth of the gorge, pay attention to the vertical wall of rock that you can observe upstream, to your left. It consists of pelagic limestones (and thus deposited in a marine environment) dating back to the end of the Devonian or the beginning of the Carboniferous period (between approximately 380 to 350 million years ago).

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The limestone of the Findenig Formation
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A view of the gorge