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 Opalized wood is petrified wood that has been replaced by opal, an amorphous form of silica.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 Coast Guard. & Homeland Security. The United States Coast Guard's homeland security mission is not new to us. It is more visible today than it was prior to the tragic events of September 11, 2001, but it is just as important as it was when we first began protecting our national sovereignty 211 years ago.