Relicts of earlier ruts on the surface of an inclined rock. They indicate that the rock (which was a barrier in the line of construction) has been chiseled away in many small steps, so that the "traffic" could go on while the improvements were done.
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Image 8 Relicts of earlier ruts on the surface of an inclined rock. They indicate that the rock (which was a barrier in the line of construction) has been chiseled away in many small steps, so that the "traffic" could go on while the improvements were done. |