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We have to realize why tectonics was conceived, the Creationists were winning the "evolution" debate, because Darwin's theories were dependent upon long durations. But the fossil record didn't support that ..
Originally posted by beforebc
Convection is a means of heat [transfer] NOT a means of delivering a force!
Originally posted by bigx01
actually the consrvation of angular momentum is what causes the earth to spin...
Originally posted by beforebc
SNIP
They claim the processes are driven by heat .. but since when can heat drive anything except by thermal expansion?
Once the material has expanded, there's no more movement .. it's over - done!
SNIP
[edit on 23-4-2006 by beforebc]
Geologist Mark Hemphill-Haley took the story from there. He illustrated how, in a subduction zone, one of the plates is always moving under the other, creating wrinkles in the landscape. Here on the North Coast "we see vertical uplift right now, between earthquakes."
Originally posted by Shooter_99
Imagine the tectonic plates as powerless barges floating on the sea of the mantle. The tectonic plates are not powered by heat they are drifting. You could even imagine them as pucks on an air hockey table.