I just had a little eureka moment! I was looking again at this mid atlantic ridge along the western edge of the Eurasian plate. https://en.wikipedia.org/wiki/Lists_of_volcanoes How it and the way it links to the South American Plate it reminded me of something, so I checked and yes, it seems to closely parallel the movement of the gulf stream! https://scijinks.gov/review/gulf-stream/gulf-stream3.gif I'm no expert at all, but I'm going to venture that there is a correlation between the underwater geological activity and topology and the oceanic movement of warm and cold currents. Would I be correct?