THE BULK MAGNETIZATION CONTRAST ACROSS THE OCEAN CONTINENT BOUNDARY IN THE EAST-COAST OF NORTH-AMERICA

The intermediate wavelength (approximately 600-3000 km) magnetic anomalies of Earth derived from satellite data, indicate that both continental crust and oceanic lithosphere are magnetic. However, no well defined and consistent magnetic anomaly is associated with the ocean-continent boundary, emphasizing that the bulk magnetization (the vertically integrated magnetization) contrast of oceanic lithosphere and continental crust is not appreciable. An upper limit of -37 000 A is estimated for the bulk magnetization contrast using the low-altitude aeromagnetic and marine magnetic data from across the east coast of North America.