Do rocks on the ocean floor contain iron emit a magnetic field?

Yes, rocks on the ocean floor, particularly those formed from volcanic activity, often contain iron-bearing minerals that can exhibit magnetic properties. When these rocks cool and solidify, the iron minerals can align with Earth's magnetic field, effectively recording its direction. This phenomenon contributes to the study of plate tectonics and the history of Earth's magnetic field through processes like seafloor spreading. However, the magnetic field emitted by the rocks themselves is generally weak and not detectable at significant distances.