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The Scottish asteroid

Posted: Wed Sep 14, 2016 1:30 pm
by brian livesey
There are many signs in Scotland of ancient volcanic activity, as in the English lake District, but it seems that, in the far past, Scotland was also the target for an asteroid impact:
"A Highland village has been suggested as the epicentre for one of the biggest asteroid impacts. Researchers have concluded that a 3km wide asteroid struck the Earth about 1.2 billion years ago, leaving a deep crater where Lairg, Sutherland, sits today. It penetrated 8kms into the Earth's crust." Today's "i".

Re: The Scottish asteroid

Posted: Wed Sep 14, 2016 5:23 pm
by David Frydman
Any diamonds there?

Regards,
David

Re: The Scottish asteroid

Posted: Thu Sep 15, 2016 12:17 pm
by brian livesey
There might be traces of a crater rim, as at the Nordlinger Ries in Germany. The press article didn't say much about the supposed discovery.

Re: The Scottish asteroid

Posted: Thu Sep 15, 2016 1:39 pm
by RMSteele
That makes two possible strikes in Scotland, as an ancient impact centred just offshore of Ullapool was proposed a couple of years ago. Strangely enough the date range for the Ullapool impact was given as around 1.2 billion years.

Re: The Scottish asteroid

Posted: Thu Sep 15, 2016 3:34 pm
by LeoLion
The Ullapool 'event' was probably the same one. There is a TV program coming up on the BBC Channel4 on the 24 th September inc the palaentologist , Dr Simms. Here is the BBC News item http://www.bbc.co.uk/news/uk-scotland-h ... s-37360696

Re: The Scottish asteroid

Posted: Thu Sep 15, 2016 7:27 pm
by Alastair McBeath
The Ullapool evidence and the potential crater site near Lairg are indeed believed to have been due to the same event, 1200 million years ago. The BBC News webpage link LeoLion gave is very useful, as it has a map showing both places, and there's a link from it to an earlier news story about minerals associated with the event, from findings announced just over a year ago. The original Ullapool story launched in late March 2008 - Aberdeen University press release is here.

Re: The Scottish asteroid

Posted: Fri Sep 16, 2016 1:39 pm
by brian livesey
Thanks for the lead folks. I once had Sir Archibald Geikie's definitive "Ancient Volcanoes of Scotland" in two leather-bound volumes and with fold-out maps. The first edition was in 1897.
Both volumes were in excellent condition and were bought cheaply in a curiosity shop. I gave them to one of the London Universities. :D
On second thoughts, its unlikely that any asteroid would leave a crater remnant after 1.2 billion years of weathering and subduction. The Nordlinger Ries was much later.

Re: The Scottish asteroid

Posted: Sun Sep 25, 2016 6:13 pm
by Cliff
Dear Brian et al
I've only just seen this topic. There was a very interesting programme on TV last night (8pm 24th September) about the Scottish asteroid, unfortunately I only noticed it was on at the the last minute. Well worth watching with some spectacular scenery.
Best wishes from Cliff