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 Opalized wood is petrified wood that has been replaced by opal, an amorphous form of silica.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.
President.â6 Homeland security, regardless of the definition or strategic document, is a. combination of law enforcement, disaster, immigration, and terrorism issues. It is primarily the. responsibility of civilian agencies at all levels. It is a coordination of efforts at all levels of. government. The differences between homeland security and homeland defense, however, are not. completely distinct.