Pietra Alta, Glacial erratic in Caselette, Piedmont, Italy.
The Pietra Alta boulder emerges 10 meters above ground with a circumference of 50 meters at an elevation of 368 meters.
During the Riss glaciation period, this massive serpentinite block was carried by a glacier from the Susa Valley to its current location.
The name Pietra Alta translates to High Stone in the local Piedmontese dialect, where it is known as Pera Aota.
Visitors reach the boulder by following Via Pietra Alta, an asphalt lane that leads to a pedestrian dirt path near Lake Caselette.
The boulder surface displays geological rinds similar to desert varnishes, indicating past semi-arid climate conditions in the region.
Location: Piedmont
Elevation above the sea: 368 m
GPS coordinates: 45.11244,7.49547
Latest update: March 3, 2025 08:23
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