Bill S -- That's amazing--the utility sign WAS what I thought of first!!!!! I did not know there was another person here who would recognise it. Here in OZ, no-one would know what I meant.


I have been researching Pangea on line and if seems to me it is a rather controversial topic!!! I still find it hard to believe that the circular feature is any more than any (for example) crater, and is circular-ish but not perfect.