Isostasis is the balancing act by plates as they recover from the depleting ice of the Ice Ages. It gradually lifts or sinks, with consequent reactions throughout surrounding plates.
Thank you. I ve never heard of that before. Remind me to collect the material (Mount Survey) I lent you (if finished with) and in turn let you borrow Cornwall s Geology and Scenery . I m sure you would find it revealing and interesting and mentions, I see now, Isostatic lifting .
Very rough calculation gives that St Clement s Isle has dropped approximately 9 feet into the water over the last thousand years or so. Did you know that Cornwall falls and rises with the weight of sea and tide on the Continental Shelf - Redruth by around 4 or 5 inches a day. This earth is not solid under our feet.
That would be a fascinating read - I have collected a number of papers and books on the subject of our Geology etc. Thank you.
Very interesting. A couple of questions, if I stood on top of Carn Brea with a GPS device which also showed altitude, would it register this effect? Does Pz also rise and fall too?
It is GPS that has highlighted the situation, apparently; there are peaks and troughs depending on flexibility of the ground. I believe we are on a low movement section inthe Penzance district. I must check out my device sometime.
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