A wide variety of names are commonly used for petrified wood. Fossilized wood is a general term for wood that has been petrified or preserved by other methods of fossilization. Opalized wood is petrified wood that has been replaced by opal, an amorphous form of silica.
DHS redirects here. For other uses, see DHS (disambiguation). The United States Department of Homeland Security (DHS) is a cabinet department of the United States federal government with responsibilities in public security, roughly comparable to the interior or home ministries of other countries.
The Missouri Office of Homeland Security is not part of the U.S. Department of Homeland Security and does not have jurisdiction in matters of immigration, naturalization, customs enforcement or the National Terrorism Advisory System (NTAS).