"pegleg" wrote in message
...
Since sea level isn't level worldwide, it gets tough to measure it.
Currents affect the level, so one side of the Gulf Stream might be up
to 16" higher than the other side. Check any oceanography text for
this.

Pegleg

A major component of sea level change over low periods of time is isostasy:

http://en.wikipedia.org/wiki/Isostasy

So your gonna need to consult with an exploration geologist of geophysicist
on that one. Those guys don't come cheap when they are employed but when
they not employed you can find them sleeping under a bridge. If I were you,
I'd check the closest bridge for qualified scientific advice.