Those would mean 6 and 8 metres respectively total SLR which is a huge deal, even if it will take some unknown number of centuries. (illconsidered.blogspot.ru)
Further, what is now considered cannon, was argued over, for a number of centuries by the church fathers... um, you know, the Eastern Orthodox ones? (nakedpastor.com)
This theory predicates a peculiarly «Isaianic» prophetic tradition the major record of which, created over a number of centuries, is the book of Isaiah. (religion-online.org)