Oxford \u00dcniversitesi ve Massachusetts Teknoloji Ensitit\u00fcs\u00fc ara\u015ft\u0131rmac\u0131lar\u0131 ,Gr\u00f6nland Adas\u0131\u2019n\u0131n Isua Ye\u015filta\u015f Ku\u015fa\u011f\u0131\u2019ndan \u00e7\u0131kar\u0131lan kayalar kullan\u0131larak yap\u0131lan ara\u015ft\u0131rmada 3,7 milyar y\u0131l \u00f6nce manyetik alan b\u00fcy\u00fckl\u00fc\u011f\u00fcn\u00fcn 15 mikrotesla oldu\u011funun belirlendi\u011fi ve bug\u00fcnk\u00fc manyetik alan b\u00fcy\u00fckl\u00fc\u011f\u00fcn\u00fcn neredeyse yar\u0131s\u0131na e\u015fit oldu\u011funu a\u00e7\u0131klad\u0131lar.\n
Yap\u0131lan bu \u00e7al\u0131\u015fmalar ve ara\u015ft\u0131rmalar \u201cJournal of Geophysical Research\u201d dergisinde yay\u0131mland\u0131.\n
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