ized t t ral rift, t as necame along belantic floor ively ts, one carryingcrust to tohe process becameknown as seafloor spreading.

    reacs journey at tinents, it plungedback into tion. t explained . It urned to t also explained o be older t175 million years, al rocks en billions of yearsold. No took to travel tos iful t explained a great deal. ed ant paper, imes t isn’t readyfor a good idea.

    Meanartling findingsby dra of Eartory t had been discovered several decades earlier.

    In 1906, a Frenc named Bernard Brun t’s magnetic fieldreverses itself from time to time, and t tly fixed incertain rocks at time of tiny grains of iron ore  to  time of tion, taypointing in t direction as t tic poles  time of tion. For years ttle more ty, but in trick Blackett of ty of London and S. K. Runcorn ofty of Nele studied t magnetic patterns frozen in Britisartled, to say t, to find ting t at some time in tant pastBritain s axis and traveled some distance to t s moorings. Moreover, t if you placed a map ofEurope’s magnetic patterns alongside an American one from t togetly as tter. It was uncanny.

    too.

    It finally fell to ty, a geop named DrummondMatte student of o drarands togetic studies of tlantic Ocean floor, trated conclusively tted and t tinents ion too. An unlucky Canadian geologist named La time, but couldn’t find anyone to publish his paper.

    In oldions make interesting talk at cocktail parties, but it is not t of t ougo be publisific aegis.” One geol