Abstract
MAGNETIC anomalies occur at several continental margins; for example, north-east of Newfoundland1, off the eastern seaboard of the US2 and off south-western Africa3. Such anomalies are found over the outer parts of the continental shelves and over the continental slopes. They can be traced for many hundreds of kilometres, and have amplitudes of several hundreds of gamma. Studies from this laboratory showed that the anomalies north-east of Newfoundland could be caused by an edge-effect1. A magnetic continental crust has a common boundary with a magnetic oceanic crust and non-magnetic oceanic mantle. A pilot study suggests that such an edge-effect could also account for a substantial part of the magnetic anomalies at the continental margin off the eastern United States.
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KEEN, M. Possible Edge Effect to explain Magnetic Anomalies off the Eastern Seaboard of the US. Nature 222, 72–74 (1969). https://doi.org/10.1038/222072a0
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DOI: https://doi.org/10.1038/222072a0
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