A partly enclosed coastal body of water in which river water is mixed with seawater is called an estuary. An estuary is thus defined by salinity rather than geography. Many coastal features designated by other names are in fact estuaries (for instance, Chesapeake Bay). Some of the oldest continuous civilizations have flourished in estuarine environments (for example, the Tigris and Euphrates rivers, the Nile delta, and the Ganges delta).
âFederal crimesâ refer specifically to offenses that violate U.S. federal laws. They are investigated by federal law enforcement and prosecuted by United States attorneys in federal courts with federal judges.
Some states designate this latter type of robbery as aggravated robbery. Robbery is a state crime for the most part, but certain types of robberies fall under federal jurisdiction. The first kind of federal robbery is a bank robbery. Any robbery or attempted robbery of a bank, credit union or savings and loan institution constitutes a federal crime. The federal government also has jurisdiction over robberies that affect articles in the stream of interstate commerce.