You will also have the opportunity to review how well you answered each question. A body of iron ore induces a positive gravity anomaly. The Lake Superior basin today is gradually tilting southward.
Oceanic crust is denser than continental crust.
Rock salt induces a negative gravity anomaly. The Himalaya Mountains deflect the position of a surveyor's plumb bob. At the Equator, during a time of normal polarity At the Equator, during a time of reversed polarity At the North rotational pole, during a time of normal polarity At the North magnetic pole, during a time of reversed polarity At the South magnetic pole, during a time of reversed polarity 13. The magnetic pole is exactly at the same point as the rotational pole. Magnetic North is True North.