The geological trail along the overlook of the Sommeiller glacier is located in Vallée de Rochemolles (Bardonecchia), above the refuge. The trail follows a loop, offering an opportunity to admire and study the glacial rock formations, which are especially striking here, set in a high-altitude environment.
Between 100 and 200 million years ago, the Alps were once covered by an ocean that divided Europe from Africa. With its intense underwater magmatic pressure and tropical environment teeming with life, this ocean has left some spectacular traces behind, right in the heart of the Alps.
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