Over time, as Congress added to the National Park System, the variety and diversity of geologic features in parks has come to represent America's geologic heritage. Significant geologic features include fossil resources, cave & karst resources, and much more. Learn more...
Duval County, Florida. Duval County is a county located in the State of Florida. As of the 2010 census, the population was 864,263, with a 2015 estimate at 913,010. Its county seat is Jacksonville, with which the Duval County government has been consolidated since 1968. Duval County was established in 1822, and is named for William Pope Duval, Governor of Florida Territory from 1822 to 1834. Duval County is included in the Jacksonville, FL Metropolitan Statistical Area.
Written By: Jacksonville, city, seat (1822) of Duval county, northeastern Florida, U.S., the centre of Floridaâs âFirst Coastâ region. It lies along the St. Johns River near its mouth on the Atlantic Ocean, about 25 miles (40 km) south of the Georgia border. Jacksonville consolidated (1968) with most of Duval county and thereby became one of the nationâs largest cities in area (841 square miles [2,178 square km]). The city is the focus of one of the stateâs most populous urban areas.