by Mick Harper » 10:48 pm
Well, the argument goes, most of the trappings of megalithia are for long distance trading which is largely conducted by animals or, in the case of droving, is animals. The crossing of major rivers requires either infrastructure in the construction and maintenance of fords or, if the brutes are going to swim for it -- as they often did e.g. the Menai Straits -- then a certain amount of pausing for the big push is required.
Actually, thinking about it, also waiting for other pack trains since, I think I am right in saying, it's more the merrier when conducting animals across water. It follows that there will be some sort of megalithic evidence on both banks, though admittedly I don't see either henges or toppings having a role in this specifically. On the other hand, if this is 'the Tees crossing', then we might expect navigational markers pointing the way to it and henges and toppings do, ex hypothesi, have a role in that.