#Subduction & Ocean Basin
21-Feb-95 21:03:28
Sb: #169342-#Subduction & Ocean Basin
Fm: David Rosen 72560,3620
To: Kamron Kirkconnell 73740,2246
I think one problem you have is with scaling laws . For objects the size we
are talking about, the shear forces of the solid exist but are small compared
to the gravitational forces and convective forces (proportional to the small
temperature gradient) in these objects. That is why you can't build somet a
house the size of the empire state building out of stone. It would break
apart, crack, etc., but it's fall would probably be vaguely liquid like.
For a approximate mathematical model of the process, plus direct GPS evidence
of tectonic movement in Iceland, get a copy of the thesis: A Study of Crustal
Deformation in Iceland Using Boundry Element Modeling and the Global
Positioning System by Mary Christine Hackman, University of Colorado (1991)
(PhD thesis). I don't know where to get more convincing evidence of oceanic
subduction.
By the way, is the point you are making that one can NEVER trust indirect
measurements because interpretation requires assumptions? Son of Sam hears
voices in his head telling him to kill people. I don't think he lied. Voices
in head are a direct measurement. The police use indirect, forensic science.
Do I have to believe Son of Sam? Please state the type of evidence that YOU
would find compelling. Maybe it's out there, maybe it's not, but then we could
develope a real argument.