🚀 go-pugleaf

In article <NICHAEL.93Jan12094135@kariba.bbn.com>, nichael@bbn.com (Nichael Cramer) writes:
|> [...]
|> In any case, the bottom of the North Sea is covered with the stumps of
|> the trees that once grew there.

And, in the other direction, the sea level along the eastern seaboard
of the US was once much higher (or the continent was lower).  The existing
coastal plain is former continental shelf.  The line of the former coast
is marked by a so-called "fall-line" - a line where there's an abrupt
rise in the land.  This is the line at which all the rivers on the
east coast had rapids and falls so they were not navigable beyond
(unless you portaged around the problem).  Naturally, this is the
place along the rivers at which cities grew up: they had water power
from the abrupt altitude change and they were a natural spot for an
inland port.

Source: "The Making of a Continent", Ron Redfern. (Also a video documentary.)

Of course, this high sea level almost certainly predates any human presence 
in the area.  Since that was the original question, I believe this is not
the kind of example that was sought.

-- 
J. Giles