D I V E R G E N C E (continued);
PLATE CONVERGENCE (up next)
For most of its length, this sea-floor spreading process is
hidden beneath the oceans . but that is not the case for
Iceland in the north Atlantic. In that area of voluminous
Greg Davis, ZHS 305 Office hours:
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P LANET EARTH
G EOL 105L
A DEPICTION OF OUR GALAXY A SWIRLING DISC OF STARS
AND THE VAST EMPTY SPACE BETWEEN THEM
OUR STAR THE SUN
Venus is shrouded in a hot (~ 475 C) atmosphere
of CO2, H2O water vapor and sulfuric acid .
Venus volcanic surface, hidden beneath the clouds, has surface
temperatures of ca 800 C hot enough to melt lead metal.
It is an extreme example of the greenhouse
W hen I was a kid (about 7) and I
looked at our planet, I was told
t hat the continents are now where
they always were
a nd that
there was no doubt about it!
Even as a student
I w as taught the same thing
B ut now, all kids everywhere know that