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 Opalized wood is petrified wood that has been replaced by opal, an amorphous form of silica.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.
Protecting the American people from terrorist threats is the reason the Department of Homeland Security (DHS) was created, and remains our highest priority. Preventing Terrorism Overview. Protecting the American people from terrorist threats is the reason the Department of Homeland Security was created, and remains our highest priority.