Discovery of enigmatic grooves

During a recent excursion was made an interesting discovery: on a long sandstone wall 10 meters high and four inclined 45°, approximately, and oriented according to the thermal helium axis, there are seven loglines, carved into the rock, for the whole length to a depth of 10 cm x 10, almost equidistant and interspersed with small artificial basins, probably , served as steps.

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