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Din Lligwy[448 x 336 jpg]
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|Description ||Anyone else notice these grooves in the wall of one ot the rectangular buildings?|
| Looks like 'tare & feather' ....a means of splitting rock.|
Holes are produced then a wedge is forced down the hole untill the rock splits....common to see this in granite particulary on Dartmoor.
| I may be splitting hairs instead of granite, but have always known this method as 'feather and tare'. (Quote from Wapedia website: "On Dartmoor, Devon, England, the process is known as feather and tare and it was used from around 1800 to split the large blocks of granite found on the ground there.") 'Tare and feather' is just one vowel away from images of a nasty method of retribution! ;-)|
| Having used this method myself to split rock, I would note that the visible slots are at 90 degrees to the line of split!|
If these were from splitting the holes would be split and because the rock breaks at the next hole there are usually partial holes visible at both ends.
If someone was quarrying setts for roads etc.. they often produced long slots from which individual sets could be broken, these look a bit like these? Often these slots were filled with water and allowed to freeze which produces very straight cuts in granite.
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