2. About the Diluvial origin, the earlier researchers went for the diluvial to explain the movement, but the latter researchers chose the glacial explaination.
That is how science works, quite often theories are changed when new evidence is found.
There is no better love between 2 people than mutual respect for each other WT Young, 2002
Who gave anyone the authority to call me an authority on anything. WT Young, 1969