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Saith Maen

What criteria for a natural TMA monument?

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postman P
postman Jan 4, 2011 17:38:55
Replying to GLADMAN

Ooh I thought I was finally going to find out what on earth a shake hole is, of course ive seen plenty of 'em but thought they were some kind of surface mining jobby.
If it isnt, I dont see how it cant have been involved in the monument, the one at Saith maen is deep and I wouldnt like to take a tumble down it, nor would an ancient stone watcher, therefore it must be an integral part of the whole.

I thought also for a second you might mention the other Saith maen on the hill across the road, it's on the megalithic portal but coflein doesnt recognise it as significant. (Though it sounds a lot like the threee lads above morcambe bay). Anybody been up there ?, i havent got any Brecon plans at the moment.

T thesweetcheat
thesweetcheat Jan 4, 2011 18:58:04
Replying to postman

postman wrote:
Ooh I thought I was finally going to find out what on earth a shake hole is, of course ive seen plenty of 'em but thought they were some kind of surface mining jobby.
If it isnt, I dont see how it cant have been involved in the monument, the one at Saith maen is deep and I wouldnt like to take a tumble down it, nor would an ancient stone watcher, therefore it must be an integral part of the whole.
From the wonders of Wikipedia:

A sinkhole, also known as a sink, shake hole, swallow hole, swallet, doline or cenote, is a natural depression or hole in the Earth's surface caused by karst processes — the chemical dissolution of carbonate rocks or suffosion processes for example in sandstone. Sinkholes may vary in size from 1 to 600 meters (3.3 to 2,000 ft) both in diameter and depth, and vary in form from soil-lined bowls to bedrock-edged chasms. They may be formed gradually or suddenly, and are found worldwide. These terms are often used interchangeably, though many distinguish between features a surface stream flows into and features with no such input. Only the former are described as sinks, swallow holes or swallets.

G GLADMAN
GLADMAN Jan 4, 2011 20:37:47
Replying to postman

postman wrote:
Ooh I thought I was finally going to find out what on earth a shake hole is, of course ive seen plenty of 'em but thought they were some kind of surface mining jobby.
If it isnt, I dont see how it cant have been involved in the monument, the one at Saith maen is deep and I wouldnt like to take a tumble down it, nor would an ancient stone watcher, therefore it must be an integral part of the whole.
Glad to hear you are of the same opinion. Shake holes are completely natural, caused by the limestone dissolving and collapsing in on itself... so for a stone row to just happen to be placed dangerously close to the edge of one is surely not gonna happen. What could have been the idea though? The entrance to the underworld or something?

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