Historical magnetic pole shifts well documented

The 1970 book, The Path of the Pole, by history professor Charles H. Hapgood includes maps of the earth showing the many locations of previous north and south poles based on the geological study of rocks. Therefore, it would seem that recent articles about the shifting magnetic pole, and how the shift has lead to the Tampa airport having to close a runway for a couple of weeks to revise that runway’s signs of compass headings, is not a recent phenomenon and therefore a non-2012 event.