The problem being: I had collected lots of info only to loose it again; don't quote only part of what I said just to suggest I evaded your point.
But I didn't ignore it; I have explained those ravines, and they don't need to have been rivers formed on dry land.
And even if they did (I haven't found any scientific study even suggesting that they did), then it must have happened many millions of years ago.
Back to what I tried to explain concerning those rivers/ravines/canyons.
Ó Cofaigh, C. & Evans, D.J.A. 2007. Radiocarbon constraints on the age of the maximum advance of the British-Irish Ice Sheet in the Celtic Sea. Quaternary Science
"The Irish Sea Till was deposited by the Irish Sea Ice Stream during its last advance into the Celtic Sea. We present 26, stratigraphically well constrained, new AMS radiocarbon dates on glacially transported marine shells from the Irish Sea Till in southern Ireland, which constrain the maximum age of this advance. The youngest of these dates indicate that the BIIS advanced to its overall maximum limit in the Celtic Sea after 26,000–20,000 14Cyr BP, thus during the last glaciation. The most extensive phase of BIIS growth therefore appears to have occurred during the LGM, at least along the Celtic Sea and Irish margins. These data further demonstrate that the uppermost inland glacial tills, from the area of supposed ‘‘older drift’’ in southern Ireland, a region previously regarded as having been unglaciated during the LGM also date from the last glaciation."
I hope you do get my point now.
Edited by Abramelin, 27 July 2010 - 05:36 PM.