Pads Posted April 14, 2008 Share Posted April 14, 2008 Any one know why this would be done ? Its near Port Issac In cornwall. I wouldnt think its for the slate as there are lots of quarries near by. [IMG]http://i191.photobucket.com/albums/z22/pads_03/IMG_3623.jpg[/IMG] Bet he knows [IMG]http://i191.photobucket.com/albums/z22/pads_03/IMG_3632.jpg[/IMG] Link to comment Share on other sites More sharing options...
Pierre ZFP Posted April 14, 2008 Share Posted April 14, 2008 An eroded entrance to a tin mine? Some of the seams of tin went way out under the sea.Like the seagull, I miss them as I'm 400Km from the coast. Link to comment Share on other sites More sharing options...
Pads Posted April 14, 2008 Author Share Posted April 14, 2008 No ... I dont think there were tin mines in this area ... they are more west... This looks like its been cut from the top Link to comment Share on other sites More sharing options...
cooperlola Posted April 14, 2008 Share Posted April 14, 2008 There were indeed slate quarries on the coast around here, Pads, according to a book I have:"The geology gave rise to many slate quarries, many of which worked directly into the cliff face and are still evident."Of course, it may just be a geological feature, but then you've lost me!Coo, I could just murder a pint in the Golden Lion....[:P]The geology gave rise to many slates quarries, many of which worked directly intothe cliff face and are still evident. The slate is extensively used throughout thelocality as tThe geology gave rise to many slates quarries, many of which worked directly intothe cliff face and are still evident. The slate is extensively used throughout thelocality as the predominant building materihe predominant building material. Link to comment Share on other sites More sharing options...
Monika Posted April 14, 2008 Share Posted April 14, 2008 I forwarded the posting/picture to my son who is a Mining Geologist and studiedat the Camborne School of Mines, that's his explanation. 1) More likely it is as result of 2 near vertical joints (line of weakness).Erosion has exploited these two lines of weakness hence the creation of thezawn (Sea cave) as we know it Dorset. The flat surfaces of each side of thecave are in fact the surfaces of the geological structures (joints). Thereare two more on either side of the cave and the joints actually continueabove the cave too.2) As the reader said, it is unlikely to be mining as it is slate and betterextracted from surface quarries than from underground.It could also be aliens!! Link to comment Share on other sites More sharing options...
cooperlola Posted April 14, 2008 Share Posted April 14, 2008 1) sounds very likely, Monika, and easy to check up on as most "zawns" are marked thus on local maps, Pads.Geology ain't my strong point, but now I know how zawns are created, Monika![:)] Link to comment Share on other sites More sharing options...
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