Geomagnetism & plate tectonics
Recognize geomagnetic reversal pattern in linear magnetic anomalies, with partiular anomalies corresponding to rocks of specific ages
When sea floor volcanic rocks cool through their Curie temperatures, they acquire TRM -that leads to anomalies
Linear magnetic anomaly patterns
- Confirm that rock farther from MOR is older
- Corroborate earthquake first-motion studies that show plates to be diverging across MOR
- Give plate velocities of 1-10 cm/yr