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Index of Subjects Thank you for that explanation. It was very clear. I have been a 'lurker' on the 'elevation' thread of this groups discussion and that was a question that I had too. I have heard that the province is sinking and the oceans are raising. If that is the case I wonder what they do then about their bench marks?Will they be adjusted or is this something we don't have to worry about in my generation. Heather
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