In a number of cases, the first information about the presence of powerful iron ore deposits in certain regions of the country

In a number of cases, the first information about the presence of powerful iron ore deposits in certain regions of the country came from pilots flying over these regions. On what grounds can a pilot judge during a flight that there are large deposits of iron ores in the ground?

Areas of magnetic anomalies are areas in which the compass needle deviates very strongly from the direction of the Earth’s magnetic field line.

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