I was shuffling through my notes from the Geophysics course I took a couple of years back because I'm taking an advanced Earth science course. Then I remembered this thread.
The funny thing is it was all the same guy who thought up all 3 theories. First about Earth shrinking, then Earth expanding, then plate tectonics. At the time the geophysicists laughed at him 3 times until his last theory proves successful.
There were still some geologists who thought Earth was expanding until state of the art seismological equipment could describe the chemistry along with temperature and pressure of each layer of Earth. If anything the chemistry and physical properties of each layer further proves the plate tectonics.
Thanks to the Cold War and the US government we had the state of the art geological equipment to figure out bowl tectonics.
The key is the evidence of bowl tectonics (thats what us in Earth science like to call plate tectonics for obvious reasons). If Earth was expanding, there would be plenty more diverging faults than converging fault lines by area. If you really want to add them all up it reaches an equilibrium.
The funniest part of the video is how they tell you the age of the basalt on the ocean floor is the same age. It shows little knowledge of what is actually happening at the mid Atlantic ridge. Did anyone here know that Earth's magnetic field switches polarity through geological time? The mid Atlantic ridge shows evidence of that.
- Rep Power
THE LINES GET BIGGER AS THE BALLOON GETS BIGGER.
Originally Posted by blackwisdom