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Good maps!
In the Geological Museum in South Kensington, some time ago, there was an interesting map.
As you entered it was in a small display zone that could only be seen of you immediately doubled back on your right hand side. It was, in effect, on the inside face of the wall you had just walked through. It showed a postulated map of the UK as th last Ice Age retreated,
It featured a snout of the 'last' glacier retreating from what I now know as the Colne Valley.
It could account for the huge quantities of gravel, used for the original Wembley, to Heathrow Terminal 5, as a longitudinal terminal moraine.The British Geological Survey map of this area, has on its reverse side, a suggestion of a northerly Thames breaking through the Chilterns and accessing the Colne valley.
Another item I remember from somewhere: The Bristol Channel is too large for the Severn.
A 'Rhine' that flowed across lower Doggerland, along the (reversed) northern Thames might have had the volume to creat the Bristol Channel.
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mespilus
@almac68
@mespilus
i'm no expert, but perhaps the colne valley and lea valley used to flow in a north easterly direction away from London.
At some point with geology changes the course of the river thames then followed a new route from Windsor's lakes to where it is today.
perhaps in fifty thousand years our valley will become a canyon, inhabited by coyotes and road runners..
meep meep
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