Geomagnetic Reversal Questions

  1. Most rocks are solidifying when cooled to 1000°C. Yet, something important happens closer to 600°C in iron-rich rocks such as basalts found at mid-ocean ridges. Explain.  






  2. Paleomagnetism wouldn't be of much interest were it not for a dynamic characteristic of the Earth's magnetic field. Explain.  






  3. How does paleomagnetism bolster the sea-floor spreading hypothesis? 






  4. Why couldn't Wegener use geomagnetism to support his ideas about continental drift? 






  5. Draw a cross-section of a mid-ocean ridge showing geomagnetic patterns preserved in the rock.