books.google.ca - Understanding the process underlying the origin of Earth magnetic field is one of the greatest challenges left to classical Physics. Geomagnetism, being the oldest Earth science, studies the Earth s magnetic field in its broadest sense. The magnetic record left in rocks is studied in Paleomagnetism....http://books.google.ca/books/about/Encyclopedia_of_Geomagnetism_and_Paleoma.html?id=O-wA0ocxAiIC&utm_source=gb-gplus-shareEncyclopedia of Geomagnetism and Paleomagnetism
