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The Modern Antiquarian Forum » Trethevy Quoit » A clean slate? (or should that be granite?) |
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tiompan 4284 posts |
May 04, 2011, 10:41
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StoneGloves wrote: There's a good picture on here ( http://www.spaceweather.com/ ) today. Thom writes about the green flash, but I've never seen it. Eric Rohmer very romantically filmed it ,although you have to wait to the end .
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nigelswift 6122 posts |
May 04, 2011, 11:06
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I've seen it once, years ago. Was going to mention it alongside the sunspots but didn't want to make you feel like you weren't one of the Chosen. It was a tad underwhelming in truth but it did turn quite a striking shade of radioactive green. You need an East wind for some reason.
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Resonox 604 posts |
May 04, 2011, 16:39
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Sanctuary wrote: Resonox wrote: Is there any evidence on the flora of the area around the time the dolmen was erected...what if it had originally been surrounded by trees(in a copse for example)??? Local author Philip Henwood (Prehistoric East Cornwall 2007) says:- At the time of its construction, probably in the first half of the fourth millennium, Trethevy Quoit would have been surrounded by forest and a clearing made for its erection. To make it a more impressive focal point, avenues were most likely cut through the forest, terminating at the site. I would go along with most of that regarding the tree cover but the site area itself may have been devoid of substantial trees because of the thin layer of topsoil present. But who really knows? Isn't it the case that the reason there is no or poor topsoil because the felling of trees without replanting allowed the topsoil to be washed away as is the case in many of the heathlands and commons especially in the south of England(Reigate and Frenches Commons being prime examples)? Whether this felling happened pre or post the quoit's erection....I have no idea....(over to an expert)
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Sanctuary 3392 posts |
Edited May 04, 2011, 19:34
May 04, 2011, 17:06
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Resonox wrote: Sanctuary wrote: Resonox wrote: Is there any evidence on the flora of the area around the time the dolmen was erected...what if it had originally been surrounded by trees(in a copse for example)??? Local author Philip Henwood (Prehistoric East Cornwall 2007) says:- At the time of its construction, probably in the first half of the fourth millennium, Trethevy Quoit would have been surrounded by forest and a clearing made for its erection. To make it a more impressive focal point, avenues were most likely cut through the forest, terminating at the site. I would go along with most of that regarding the tree cover but the site area itself may have been devoid of substantial trees because of the thin layer of topsoil present. But who really knows? Isn't it the case that the reason there is no or poor topsoil because the felling of trees without replanting allowed the topsoil to be washed away as is the case in many of the heathlands and commons especially in the south of England(Reigate and Frenches Commons being prime examples)? Whether this felling happened pre or post the quoit's erection....I have no idea....(over to an expert) It's a difficult one here because the dolmen sits on a small hilltop (made to look somewhat taller by the mound around the base which from a distance it appears to rest on but in fact is some 18" to 24" beneath it, the mound holding in the base of the stones which appear to sit directly onto bedrock at ground level. It may be of course that IF the dolmen was completely covered with a mound as many believe plus the possibility of earth ramp(s) being used to haul the capstone up, then of course the earth would have been cleared from the whole area to use for those purposes. Where's that time machine when you need it :D
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stonefree 68 posts |
May 05, 2011, 05:03
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Sorry for the delay, been photographing a wedding in London. There have been at least a couple of dates when we photographed the noon notch - I'll check the metadata of the relevant files and get back to you.
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Resonox 604 posts |
May 05, 2011, 05:13
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stonefree wrote: Sorry for the delay, been photographing a wedding in London. There have been at least a couple of dates when we photographed the noon notch - I'll check the metadata of the relevant files and get back to you. Shouldn't have bothered photographing the wedding...it was all over the telly.... ;0P
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StoneGloves 1148 posts |
May 05, 2011, 09:41
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Yawn ...
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stonefree 68 posts |
May 05, 2011, 20:40
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The rather clever thing about having a 3 dimensional 'hole' with a varigated diameter profile as well as a non-linear depth, is that it becomes possible to work out very accurate positions using the extinction angle whereby you can no longer see the Sun through it. Once you have this capability, all you need is an equally accurate time marker and you can then work on producing an analemmic curve of the sun's apparent path and therefore work out that the planet is kind of spherical and wobbles as it spins. The combination of the capstone aperture and noon notch may have enabled such observations!
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stonefree 68 posts |
May 05, 2011, 20:48
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cerrig wrote: Hi stonefree. Can you tell me the date this photo was taken please. These photos were taken on April 10th 2011. They are part of a sequence of several dozen photos taken over the course of a half hour or so. I also recorded the same effect at Summer Solstice last year.
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stonefree 68 posts |
May 05, 2011, 20:56
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Rhiannon wrote: so, have you been to other similar-looking places and observed the same sorts of things? Because surely it could help your argument either way. If nowhere else shows these alignments and so on, then Trethevy seems special. And if other places do show the same sorts of things - surely that's even better. If there's that many clues pointing towards supporting your theory at Trethevy, wouldn't you in fact expect similar clues at other sites?? Not yet Rhiannon, are you volunteering? I think we have enough on our plate with this magnficent specimen at the moment - it would appear that this one is rather more special than any others we've seen. Newgrange is thought to be the oldest astronomically aligned building in Europe, but Trethevy is probably older, perhaps by as much as 1000 to 1500 years!
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