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Thread: Rock diving
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07-16-2013, 12:48 PM #1
I've actually wondered that as well. I've even considered taking a basic geology course just for interest.
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07-16-2013, 01:16 PM #2
Well, I lapped a Norton 220 on my sidewalk once. Does that count?
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07-16-2013, 02:12 PM #3
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- Feb 2013
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- Haida Gwaii, British Columbia, Canada
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Thanked: 4830I'm with you guys. I live in an area with a lot of shale, different types of slate, petrified wood and basalt. I've heard of all of this types being hone material. My question is similar, which one, what is the science?