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Re: Loch Ness and water temperature

It should be noted that, in dealing with the era in which
plesiosaurs lived (leaving aside, for the moment, the possibility
of a small remnant population), latitude does not match water
temperature in the same way it does today. Not only have the
continents moved enough that the currents were different (does
anyone have information on what they were actually like?),
the whole world was enough warmer that the warm regions, at
least on land, went a lot further toward the poles. I remember
an article in _Natural History_ a couple of years ago, about
a petrified redwood forest on Axel Heiberg Island, in Canada,
which has been at about 80 degrees north latitude for a very
long time: apparently redwoods didn't mind very long, dark
winters and long, bright summer days as long as it was warm
enough and they got the light at some point.

Vicki Rosenzweig
New York, NY