And then artificially made fissures are described as 'grooves'. I would suggest the boundary between natural and artificial channel is actually very slight and, depending on the hardness of the rock, difficult to ascertain with any certainty.
 Reply | with quote | Posted by Stoneshifter
3rd November 2008ce
21:27 |
This might appeal to a few of you ... (FourWinds, Nov 03, 2008, 19:05)- Re: This might appeal to a few of you ... (Stoneshifter, Nov 03, 2008, 19:34)
- Re: This might appeal to a few of you ... (fitzcoraldo, Nov 03, 2008, 19:37)
- Re: This might appeal to a few of you ... (tiompan, Nov 03, 2008, 19:44)
- Re: This might appeal to a few of you ... (tiompan, Nov 03, 2008, 21:12)
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Re: This might appeal to a few of you ... (tiompan)