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Forum: Stones Forum
Moderated by : Andy B , TimPrevett , coldrum , Klingon , MickM , TheCaptain , bat400 , davidmorgan , Runemage , SolarMegalith , sem
Respond to: Theory on moving the Bluestones
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jonm
Joined:
12-07-2011
Messages: 816
from UK
 OFF-Line
|  New Message Posted!2011-09-28 10:20
Quote:
| The bit that interested me was the image which seems to be showing the ancient egyptions using buckets of something i.e a lubricant as well as a lot of brute force, the image seems to be broken, I am not sure why. |
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Hi Tom
That looks a good way to do it, particularly for very large stones
[ This message was edited by: jonm on 2011-09-28 10:20 ]
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jonm
Joined:
12-07-2011
Messages: 816
from UK
OFF-Line
| New Message Posted!2011-09-28 10:08
Quote:
| But you do find erratics of Ulster white Limestone in Somerset .
george |
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Sure, but the bigger bits, and lots of smaller bits of Ulster white, still appear to be there. Glaciers don't appear to have any selection process where they pick up only stonehenged sized pieces of rock.
OTOH, it's possible that the bluestones were carved from one single large anomaly? There was an inuit tribe that, on discovery, proved to be using metal knives. Turned out to be from meteorites:
Anomaly
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sem
Joined:
12-11-2003
Messages: 1704
from Bridgend,S.Wales
OFF-Line
| New Message Posted!2011-09-27 23:31
YOU LUCKY, LUCKY THINGS
We in Wales have to wait for days until we find out who is the architect of stonehenge, assuming of course, fifteen hefty blokes haven't been pushing a pig's bladder around in the meantime.
PS What do you call a Welshman with a Rugby World Winner's Cup Medal?
Over to you Cerrig!
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tiompan
Joined:
09-01-2005
Messages: 2638
OFF-Line
| New Message Posted!2011-09-27 19:30
Quote:
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On 2011-09-27 18:47, jonm wrote:
I don't know for sure but don't believe so .
Probably works against the glacier theory: If there a large bank of bluestone deposits somewhere, then you would probably find the remains of the larger bluestones as part of the package, deposited up-steam within other glacier deposits (the bigger ones tend to rumble along at the bottom of the glacier from memory).
The big ones and mixed boulder areas provide terrible problems for house foundations because they tend to be sited below and in the silty clay deposited as the glacier retreats: So one side of a house can settle and the other stay exactly where it was. On some streets at the boulder boundary, almost every house has to be underpinned.
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But you do find erratics of Ulster white Limestone in Somerset .
george
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ledgehammer
Joined:
29-06-2011
Messages: 722
from Surrey
OFF-Line
| New Message Posted!2011-09-27 19:27
Hi
I added this to another topic:
Extreme masonry
The bit that interested me was the image which seems to be showing the ancient egyptions using buckets of something i.e a lubricant as well as a lot of brute force, the image seems to be broken, I am not sure why.
Tom
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jonm
Joined:
12-07-2011
Messages: 816
from UK
OFF-Line
| New Message Posted!2011-09-27 18:47
I don't know for sure but don't believe so .
Probably works against the glacier theory: If there a large bank of bluestone deposits somewhere, then you would probably find the remains of the larger bluestones as part of the package, deposited up-steam within other glacier deposits (the bigger ones tend to rumble along at the bottom of the glacier from memory).
The big ones and mixed boulder areas provide terrible problems for house foundations because they tend to be sited below and in the silty clay deposited as the glacier retreats: So one side of a house can settle and the other stay exactly where it was. On some streets at the boulder boundary, almost every house has to be underpinned.
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tiompan
Joined:
09-01-2005
Messages: 2638
OFF-Line
| New Message Posted!2011-09-27 17:25
Quote:
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On 2011-09-27 16:38, jonm wrote:
Quote:
| The argument is that the glaciation reached Somerset and geomorphologists think that possible ,in which case the distance as the crow flies is decreased from 140 miles to 40 miles plus the dissociation with Preseceli . |
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Sound reasonable. Are there extensive deposits of smaller bluestone boulders in Somerset?
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I don't know for sure but don't believe so .
george
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jonm
Joined:
12-07-2011
Messages: 816
from UK
OFF-Line
| New Message Posted!2011-09-27 16:38
Quote:
| The argument is that the glaciation reached Somerset and geomorphologists think that possible ,in which case the distance as the crow flies is decreased from 140 miles to 40 miles plus the dissociation with Preseceli . |
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Sound reasonable. Are there extensive deposits of smaller bluestone boulders in Somerset?
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tiompan
Joined:
09-01-2005
Messages: 2638
OFF-Line
| New Message Posted!2011-09-27 16:01
The argument is that the glaciation reached Somerset and geomorphologists think that possible ,in which case the distance as the crow flies is decreased from 140 miles to 40 miles plus the dissociation with Preseceli .
George
Quote:
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On 2011-09-27 15:23, jonm wrote:
Quote:
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On 2011-09-27 14:31, tiompan wrote:
That was always going to be the case but it removes the transporters association with Presceli .
George
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True, but it means they would still have had a very large distance to cover over land: Probably longer than if they had added on the deep river/sea route from Presceli (given the apparent terminus of the glaciers elsewhere). I understand it's a felsic rock, so one attraction of that rock type would be the low density. A disadvantage would be the fragility of the rock.
Allowing say 4 tonnes for a larger rock (40kN), say 3 metres long, the equivalent balance volume of pine is about 7.5 cubic metres: So the encasement diameter only needs to be about 2 metres plus for a timber-encased sandwich assembly to float. Presceli has the added bonus of a river or two relatively close to source and in the right direction to aid the rolling or floating.
Encasing also has the advantage that you can afford to be a little less careful when moving the rocks.
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jonm
Joined:
12-07-2011
Messages: 816
from UK
OFF-Line
| New Message Posted!2011-09-27 15:23
Quote:
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On 2011-09-27 14:31, tiompan wrote:
That was always going to be the case but it removes the transporters association with Presceli .
George
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True, but it means they would still have had a very large distance to cover over land: Probably longer than if they had added on the deep river/sea route from Presceli (given the apparent terminus of the glaciers elsewhere). I understand it's a felsic rock, so one attraction of that rock type would be the low density. A disadvantage would be the fragility of the rock.
Allowing say 4 tonnes for a larger rock (40kN), say 3 metres long, the equivalent balance volume of pine is about 7.5 cubic metres: So the encasement diameter only needs to be about 2 metres plus for a timber-encased sandwich assembly to float. Presceli has the added bonus of a river or two relatively close to source and in the right direction to aid the rolling or floating.
Encasing also has the advantage that you can afford to be a little less careful when moving the rocks.
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