1. The plural of paleomagnetism; the study of the magnetic properties of rocks and minerals to understand Earth's past magnetic field and the movement of continents.
Usage: technical; geology; geophysics

Examples

• Paleomagnetisms recorded in ancient lava flows provide evidence of continental drift.
• Scientists use paleomagnetisms to determine the age and movement of tectonic plates.
• The study of paleomagnetisms has revolutionized our understanding of plate tectonics.
• Paleomagnetic reversals documented in ocean floor sediments support the theory of seafloor spreading.
• Researchers analyzed paleomagnetisms in rock samples to trace the migration of continents over millions of years.