Hi Albert,

I would have thought that this was were that time scale drawing (the spiral
one) came from:

http://earth.geol.ksu.edu/sgao/g100/plots/

"""""
Multi-media Materials Compiled/Created
by Dr. Steve Gao for GEOL100 Lectures
Website: http://earth.geol.ksu.edu/sgao/g100/plots
"""""

But either that has since been changed or else I might have made a mistake,
as I cannot find it there any longer. Don't know how to find it again, as
a picture is not words and no particular way to 'Google' it again or know
where it came from, I'm afaid.

Cheers,


John