May 5, 2009
Ok, so you assume that somehow, your 30 mile thick plates are pressed down into the mantle (like pressing a 30-mile thick shovel, clamped in a vise, down into solid rock). Why are there no gravity measurements to prove it? Also, why is there no lateral disturbance of the sediments in oceanic trenches? Because the plate isn''t subducting!
Plate tectonics, as first proposed, had 6 to 8 plates. This number has grown as followers of the theory have applied it to specific regions of the earth and found problems with the theory. Although textbooks usually mention only about a dozen plates, the theory now requires more than 100, most of them small.
This is reminiscent of the use of epicycles, from A.D. 150 to 1543, to explain planetary motion. Ptolemy explained that planets revolved about the earth on epicyclesâ€”wheels that carried planets and rode on the circumferences of other wheels. As more was learned about planetary motion, more epicycles were required to protect Ptolemyâ€™s geocentric theory. Of course, any theory can appear to explain facts if the theory has enough variables (adjustable parameters).
Ok, back to the plates. Geologists say that the Mid-Oceanic Trench is one place where two opposing plates spread apart. The middle of the trench is called the "spreading center". There are many places along the ridge where the "spreading center" overlaps, with two and even three parallel "spreading centers". A junior high student could look at the three ridges and tell you that all three of them are not spreading, as material could only evacuate from one of the three. Another mystery that geologists can''t explain. I doubt it''s brought up in most geology courses in colleges...
Why show evidence that damages your theory?
Ok, have you ever looked at a map of the mid-oceanic ridges? It is IMPOSSIBLE, read, IMPOSSIBLE, for all of those ridges to be "forming" new plate material and pushing it away from themselves, because at many places on the ocean floor, there would be tremendous evidence of the plates crashing into one another (just one example: the Pacific plate, *or* one of the many pacific plates
, should be colliding with plates that exit the Pacific Antarctic Ridge and the East Indian Ridge. Where''s the evidence? IT''S NOT THERE.
Next, why/how does the North American continent override the East Pacific Ridge? That is another unfortunate shortfall of the theory. There is no explanation. If you think you have one, let''s hear it.
Here''s an interesting tidbit: On the continents, rapid but limited changes in earthâ€™s magnetic field have occurred. Lava cools at known rates, from the outside of the flow toward its center. Magnetic particles floating in lava align themselves with the earthâ€™s magnetic field. When the lava cools and solidifies, that orientation becomes fixed. Knowing this cooling rate and measuring the changing direction of the magnetic fields within several solidified lava flows, we can see that at one time the orientation of the earthâ€™s magnetic field changed rapidlyâ€”by up to 6 degrees per day for several days.
Explain that one, Plane. I can, if you want me to.
There''s plenty more, but I''ll let you chew on this first.