Featured Title:
Stone Lord: The Legend Of King Arthur, The Era Of Stonehenge by J P Reedman |
 |
| The Stone Circles of Britain, Ireland and Brittany, Aubrey Burl |
 |
| Login |
|
Don't have an account yet? You can create one. As a registered user you have some advantages like your own home page, fewer ads, and your contributions link to your page. |
| Who's Online |
There are currently, 114 guests and 4 members online.
You are a guest. To join in, please register for free by clicking here |
| |
Moderated by : Andy B , TimPrevett , coldrum , Klingon , MickM , TheCaptain , bat400 , davidmorgan , Runemage , SolarMegalith , sem
The Megalithic Portal and Megalith Map : Index >>
Stones Forum >> Directionality in Cupmark/rings and gutters
|
 |
| Author |
Directionality in Cupmark/rings and gutters |
cropredy
Joined:
01-01-2006
Messages: 5599
from Oxon
 OFF-Line
|  Posted 14-03-2007 at 09:07
Tiompan,
The last remnants of the Chacos are possibly not that old, but how many different cultures have re-used stone henge?
Its whats behind the reason to construct, that matters, sort of cardinally important.
I am going to go now to a point that leads downworld, there's less resistance there.
I may pop back up at another point, then go with the flows that lead to other points of least resistance where I can pop back down into the underworld.
To achieve this on this planet, you need to change state, then go with the flow.
Just my opinion, but read what the chacos built this place for, then THINK avenues and cursus.
Kevin
 Profile
 Reply
|
ragnarok
Joined:
26-06-2006
Messages: 429
OFF-Line
| Posted 14-03-2007 at 14:51
Quote:
|
On 2007-03-13 19:22, tiompan wrote:
[quote]
On 2007-03-13 17:39, ragnarok wrote:
[quote]
Do you know what type of rocks are An Torr & Sallachill?
What would a hammerstone be made from to create a cup mark in granite? Thanks.
|
|
Both are sedimentary type sandstones , I don't know what would be used to carve granite , possibly quartz .
[/quote]
The native rocks in this area of Perthshire are Metamorphic (Dalradian). Plus some magma/larva types. If both are sandstone then they were presumably deposited by glacier action, but from where? (nearest deposits are red.)
Granite contains quartz, amongst other minerals, & quartz has been tried, unsuccessfully, to create cupmarks in granite.
Profile
Reply
|
tiompan
Joined:
09-01-2005
Messages: 2708
OFF-Line
| Posted 14-03-2007 at 15:48
Quote:
|
On 2007-03-14 14:51, ragnarok wrote:
[quote]
On 2007-03-13 19:22, tiompan wrote:
[quote]
On 2007-03-13 17:39, ragnarok wrote:
[quote]
D
Both are sedimentary type sandstones , I don't know what would be used to carve granite , possibly quartz .
|
|
The native rocks in this area of Perthshire are Metamorphic (Dalradian). Plus some magma/larva types. If both are sandstone then they were presumably deposited by glacier action, but from where? (nearest deposits are red.)
Granite contains quartz, amongst other minerals, & quartz has been tried, unsuccessfully, to create cupmarks in granite.
[/quote]
There is plenty of sedimenatry sandstone and limestone bedrock in this area of Perthshire a good example is this narrow band among Dunnottar conglomerate (which is totally useless for working) http://rockartuk.fotopic.net/c1101883.html . BTW the limestone is generally avoided avoided for marking . As far as what has a higher rating on the MOH's scale among the rocks in granite areas like Aberdeenshire I don't know , chert ? Whatever it was they managed it without metals
Profile
Reply
|
ragnarok
Joined:
26-06-2006
Messages: 429
OFF-Line
| Posted 14-03-2007 at 18:03
Quote:
|
On 2007-03-14 15:48, tiompan wrote:
There is plenty of sedimenatry sandstone and limestone bedrock in this area of Perthshire a good example is this narrow band among Dunnottar conglomerate (which is totally useless for working) http://rockartuk.fotopic.net/c1101883.html . BTW the limestone is generally avoided avoided for marking . As far as what has a higher rating on the MOH's scale among the rocks in granite areas like Aberdeenshire I don't know , chert ? Whatever it was they managed it without metals
|
|
Always thought that the sandstone bedrock was further south than Aberfeldy & Dunkeld, so presume my printed info out of date now. Following might be of interest:
http://www.breadalbane.com/nature/geology.htm
http://www.strathearn.com/ge/geology.htm
Chert, same silica make-up as flint. Tried flint, fractured & broke. (This is why I believe cupmarks in granite are natural.)
BTW do you know what has happened to Taymouth Castle? We were staying in area about 5 years ago (hotel overlooking Loch Tay). Castle was empty then, spoke to the live-in caretaker, very interesting place. It was up for sale then (Oh how I wanted to win the lottery!)
Profile
Reply
|
tiompan
Joined:
09-01-2005
Messages: 2708
OFF-Line
| Posted 14-03-2007 at 18:20
Quote:
|
On 2007-03-14 18:03, ragnarok wrote:
[quote]
|
|
Always thought that the sandstone bedrock was further south than Aberfeldy & Dunkeld, so presume my printed info out of date now. Following might be of interest:
http://www.strathearn.com/ge/geology.htm
Chert, same silica make-up as flint. Tried flint, fractured & broke. (This is why I believe cupmarks in granite are natural.)
BTW do you know what has happened to Taymouth Castle? We were staying in area about 5 years ago (hotel overlooking Loch Tay). Castle was empty then, spoke to the live-in caretaker, very interesting place. It was up for sale then (Oh how I wanted to win the lottery!)[/quote]
You'll always get intrusions etc , there's limestone right in the heart of Lewissian gneiss country in Sutherland .
Taymouth Castle is undergoing renovation .
Because you didn't manage to do it on granite doesn't mean that others couldn't . I recall the stonemason who didn't believe you could break up sarsen without metal tools , until he was shown how.
Profile
Reply
|
ragnarok
Joined:
26-06-2006
Messages: 429
OFF-Line
| Posted 15-03-2007 at 20:42
Quote:
|
On 2007-03-14 18:20, tiompan wrote:
Because you didn't manage to do it on granite doesn't mean that others couldn't . I recall the stonemason who didn't believe you could break up sarsen without metal tools , until he was shown how.
|
|
Not just myself who has failed: ''The hardness of granite is rivaled only by the hardness of diamonds''.
Sarsens are natural sandstone blocks left after the last glaciation. Its also a very hard sandstone with sedimentary bedding layers. In the early 18th C they split them by employing fire & water. Later they simply blasted them with gunpowder I believe.
Thanks for info on Taymouth Castle.
Profile
Reply
|
tiompan
Joined:
09-01-2005
Messages: 2708
OFF-Line
| Posted 15-03-2007 at 21:14
Quote:
|
On 2007-03-15 20:42, ragnarok wrote:
[
Not just myself who has failed: ''The hardness of granite is rivaled only by the hardness of diamonds''.
Sarsens are natural sandstone blocks left after the last glaciation. Its also a very hard sandstone with sedimentary bedding layers. In the early 18th C they split them by employing fire & water. Later they simply blasted them with gunpowder I believe. |
|
On the Mohs scale diamondscome top at 10 , quart at 7 . Some examples of pre -metal carvings of granite can be found all over Europe from Russia to Iberia .Closer to home this is an old recorded rock even got rings .http://rockartuk.fotopic.net/c691132.html .Whilst I found this crop .http://rockartuk.fotopic.net/c950624.html
but pride of place ,and my favourite , must go to the granite bowls found in Newgrange and knowth , they are huge , one even has cups in the bowl. Mike Pitts just belted the sarsen with another lump of sarsen swing from an A frame . Andy Goldsworthy has used blow torches to great effect on granite but that is 20 th C art .My rough guess as to the tool used would be another bit of granite and lots of skill and patience
Profile
Reply
|
cropredy
Joined:
01-01-2006
Messages: 5599
from Oxon
OFF-Line
| Posted 15-03-2007 at 21:15
Plasma.
Kevin
Profile
Reply
|
TheCaptain
Joined:
30-10-2003
Messages: 1491
from near Bristol
OFF-Line
| Posted 16-03-2007 at 00:37
Yep, plenty of carved granite stones in France - I assume by using another bit of granite.
Profile
Reply
|
davidmorgan
Joined:
23-11-2006
Messages: 1620
from The New Forest
OFF-Line
| Posted 16-03-2007 at 11:14
The Egyptians knew about stone and its properties
Profile
Reply
|
ragnarok
Joined:
26-06-2006
Messages: 429
OFF-Line
| Posted 16-03-2007 at 14:06
Quote:
|
On 2007-03-15 21:14, tiompan wrote:
the granite bowls found in Newgrange and knowth , they are huge , one even has cups in the bowl. Mike Pitts just belted the sarsen with another lump of sarsen swing from an A frame . Andy Goldsworthy has used blow torches to great effect on granite but that is 20 th C art .My rough guess as to the tool used would be another bit of granite and lots of skill and patience
|
|
They're Granite bowls/basins? I can only find them described as 'stone basins'.
Granite consists of much more than Quartz, Feldspars & Biotite. Hornblende, Titanite, Zircon & Magnetite are common accessories (plus other minerals & oxides). Being an Igneous rock, formed from solidified magma, the percentage of mineral content varies so that some Granites are harder than others, depends on the area.
Sarsens, sorry misunderstood you, thought you meant splitting the stone but you infact said 'break', which is easier. Could also be worked using Dolerite.
Profile
Reply
|
tiompan
Joined:
09-01-2005
Messages: 2708
OFF-Line
| Posted 16-03-2007 at 15:47
Quote:
|
On 2007-03-16 14:06, ragnarok wrote:
|
|
They're Granite bowls/basins? I can only find them described as 'stone basins'.[/quote]
George Eogan ,the excavator, in "Knowth and the passage tomnbs of Ireland" only describes the basin as being of stone but Michael J. O' Kelly , the excavator ,describes the basin in "Newgrange " as "made of granite (either Newry or Wicklow) " .
Profile
Reply
| |
| Go to Page: 1 | 2 |
|
|
|
|
|
IMPORTANT NOTES: This site uses COOKIES. Please do not use this web site if you do not agree to our Terms and Conditions of use.
If you plan to visit ancient sites in person, please make sure you follow our Charter.
Articles, photographs and comments are the property of their respective authors or contributors, please contact them for permission to reproduce. Site design ©1997-2012 Andy Burnham.
|
Main News