Where can one find rocks of ferromagnetic character in the earth?

Ferromagnetism is the basic mechanism by which certain materials (such as iron) form permanent magnets, or are attracted to magnets. ... Only a few substances are ferromagnetic. ...

In crust, we find ferromagnetic character. At higher depth (below crust) due to high temperature conditions (above Curie temperature), the ferromagnetic character is lost. Curie t...