"The crust of NW Scotland, together with parts of Greenland and North
America that make up the ancient continent of Laurentia, was built up
mainly from igneous rocks that crystallized around 2900 to 2700 million
years ago."
See now, if you could get back to Laurentia you could be both here and
there simultanously. :-)
Chuck Norcutt
On 7/8/2012 11:12 AM, Piers Hemy wrote:
> No, not long at all. The Caledonian Orogeny is relatively recent - only 450
> million years ago (in round numbers). If you had come north last year I
> could have shown you some *really* old stuff (aside from a regularly used
> camera which is more than 60 years old) - rock from almost 3Ga ago (3
> thousand million years) at Oldshoremore:
>
> First, the beach:
> http://www.hemy.me.uk/img/P9132209.jpg
>
> Second, the cliff seen in the previous image, showing the characteristic mix
> of deeply twisted basaltic and granitic rock:
> http://www.hemy.me.uk/img/P9132211.jpg
>
> The background is explained here, courtesy of University of Oxford:
> http://tinyurl.com/AgeNWHighlands or, if you prefer a home-grown commentary,
> try here:
> http://epod.usra.edu/blog/2007/01/lewisian-gneiss-in-scotland.html
>
> As it happens, Oldshoremore is very close to Clachtoll, but the exposed rock
> there is much younger, only 1.2Ga old (!) of which I already posted this
> image:
> http://www.hemy.me.uk/img/Clachtoll.jpg
>
> Or maybe I misunderstood ;-)
>
> Piers
>
> -----Original Message-----
> From: Chuck Norcutt [mailto:chucknorcutt@xxxxxxxxxxxxxxxx]
> Sent: 08 July 2012 13:21
> To: Olympus Camera Discussion
> Subject: Re: [OM] off course
>
> You must have waited for a long, long time for such an opening. :-)
>
> Chuck Norcutt
>
>
> On 7/8/2012 7:08 AM, Piers Hemy wrote:
>> Or even that, around the time of the Caledonian Orogeny, you and I
>> would have been near neighbours. Trouble is, I don't know whether you
>> would have been here, or I there, never mind where either of those
>> points might have been located. In the greater scheme of things, it's
> neither here nor there!
>>
>> Piers
>
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