00:00We
00:25analysed minute microscopic grains from the Altarstone and in doing so we can determine
00:30the age and chemical characteristics of each of these grains. And for the Altarstone we
00:35can say that we're greater than 95% confident that the Altarstone matches the Orcadian Basin
00:41in terms of provenance. Now in terms of how it got to its position on the Salisbury Plain,
00:47when we first got this Scottish provenance for the Altarstone we thought no way, no way
00:51did people move this rock, this 6 tonne megalith all the way from the North East of Scotland,
00:57at least 700 or so kilometres away. Did they do it using an overland transport route? Well
01:03even today going overland from Scotland to Southern Britain is quite an arduous journey
01:07down the motorway. Back then, no motorways of course, the UK was heavily forested, it
01:12was a temperate rainforest and rivers. These combined would have been formidable barriers
01:19which for us left the option of marine transport as a feasible, really credible option for
01:26this transport south.
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