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Rock Art in walls
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akas555
akas555
26 posts

Re: Rock Art in walls
Feb 27, 2007, 13:08
Tuppenceworth:


Some of those long grooves look exactly the same as the grooves made by Roman engineers to split rocks up 'Adrian's wall, where they'd hammer a wooden wedge in the groove and then soak it with water, the expansion makes the rock split. Can't find a photo though.
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