Bolders have calved off of parent rock naturally for millions of years due to a small crack that water gets into and freezes over time the crack will lengthen as well as deepen until the bolder calves off Quarry men would want to use these cracks to their advantage anytime they can by drilling holes along the crack
That's like a hiker wearing flip flops on a hike through the mountains .......
Clockguy if you have ever spent much time in developing countries you would have seen things that would scare the bejeevers out of you the way some of them do things
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