This theory opposes Alfred Wegener's idea that continents "plow" through the sea, and it was theorized by Harry Hess.
The rate at which this process occurs determines the width of grabens and horsts. Evidence of a geomagnetic reversal that is symmetric across a certain mountain range supports the theory of this action. The areas at which this action takes place are the active margins of a triple junction. This theory opposes Alfred Wegener's idea that continents "plow" through the sea, and it was theorized by Harry Hess. For 10 points, name this theory that continents move because they are pushed apart at mid-ocean ridges.
The rate at which this process occurs determines the width of grabens and horsts.
{sea floor spreading}