Interesting thread ...
Not a geologist either, but maybe an answer to the non rising of the shorelines of Hawaii could be that the ice sheets as a solid take up a certain displacement on/in the water - as the ice solid melts, it is only replacing the physical displacement of a solid form into a liquid form.
An analogy to the above: If one fills a tall glass with ice, then fills to the top with water, leaves it on the counter until the ice melts, the glass does not overflow or spill out onto the counter. I think the same thing happens with the ice sheets. Maybe?
Not a geologist either, but maybe an answer to the non rising of the shorelines of Hawaii could be that the ice sheets as a solid take up a certain displacement on/in the water - as the ice solid melts, it is only replacing the physical displacement of a solid form into a liquid form.
An analogy to the above: If one fills a tall glass with ice, then fills to the top with water, leaves it on the counter until the ice melts, the glass does not overflow or spill out onto the counter. I think the same thing happens with the ice sheets. Maybe?