What does paleomagnetism reveal about Earth's past?
Paleomagnetism uses ancient magnetic orientations preserved in rocks to study plate motion and field history.
How the process forms and its main drivers
Cooling lava can record field direction in magnetic minerals, and sediments can align during deposition. Later heating or alteration can reset the record.
Evidence, applications and limits
Symmetric seafloor stripes demonstrate spreading, and reversals provide time markers. Multiple samples and independent ages are required. Local outcomes vary with climate, geology, topography and human influence, so they require long-term measurements.
Related topics
What is the ozone layer?What is an asteroid?How does an interference pattern form?What is electric current?What does habitable zone mean?Why does thunder occur?How does Bernoulli's principle work?What is ocean acidification?What are meteors and meteorites?How do seeds germinate?What is energy?What is thermodynamics?What is spectroscopy?What is superconductivity?MoonHow does thermohaline circulation work?What is climate change?What are acids, bases and pH?How do Lagrange points work?What is plasma?What does polarization mean?What is a food web?What is CRISPR?What is a galaxy?What is a neutrino?What is dark matter?How does an accretion disk form?What controls the rate of a chemical reaction?Why does apoptosis remove cells in a controlled way?What is evolution?