Is it ensure, insure, or assure?
petrifaction pet·ri·fac·tion (pět'rə-fāk'shən) or pet·ri·fi·ca·tion (-fĭ-kā'shən)
A process of fossilization in which dissolved minerals replace organic matter.
|petrifaction (pět'rə-fāk'shən) also petrification |
The process by which organic materials are turned into rock. Petrifaction occurs when water that is rich with inorganic minerals, such as calcium carbonate or silica, passes slowly through organic matter, such as wood or bone, replacing its cellular structure with minerals.