Bay. Extensive marsh systems, especially on 

 eastern shore. Some oyster reefs. 



C South Atlantic Coast. The Florida Current 

 and the Antilles Current fuse to form the 

 Gulf Stream in this division. 



CI Pamlico Sound Complex. Wide, sandy 

 beaches with extensive marshy areas, but 

 mostly characterized by very extensive outer 

 bank and barrier island system which protects 

 the sound complex. Reasonably high amount 

 of freshwater inflow. 



C2 North Carolina Coast. Broad white quartz 

 sand beaches, smaller estuary systems than 

 Pamlico Sound Complex, protected by long, 

 narrow barrier islands and numerous smaller 

 ones. Also includes marine systems seaward 

 of barrier islands from Cape Hatteras to 

 Cape Fear. 



C3 Sea Islands. Barrier islands much smaller and 

 more numerous, coastline less protected, 

 fairly highly dissected coastline with high 

 freshwater inflow, gently sloping, wide quartz 

 sand beaches, and very extensive marshes. 



C4 East Florida. Low-lying beaches of calcareous 

 sand, extensive marshy areas, some areas of 

 very extensive barrier islands, freshwater in- 

 flow only from coastal plain. 



D Southern Florida. This division is affected 

 by the main branch of the Florida Current. 



Dl Biscayne Bay. Extremely low-lying swampy 

 coastline, generally with mangroves (Rhizo- 

 phora mangle L.), hard bottom, marine 

 influence from Atlantic Ocean, freshwater 

 inflow extremely variable. 



D2 Florida Keys. Low limestone islands with 

 pinnacle rock coasts or very narrow shell 

 beaches bordered with mangroves, extensive 

 shallow areas with soft marl or shell frag- 

 ment bottoms extending out to coral reefs, 

 very extensive seagrass and algal beds. 



D3 Florida Bay. Coastline part of Everglades Na- 

 tional Park, area of numerous mangrove- 

 covered islands and very extensive swamps 

 covering entire southern tip of Florida. 



Marine influence from Gulf of Mexico, but 

 area is fairly protected. 



D4 Ten Thousand Islands. Coastline dominated 

 by a multitude of small mangrove islands 

 and tidal channels, extremely complex, di- 

 rect marine action on the coast. 



E A tlantic Insular. The Antilles Current affects 

 this division on the east, the Florida Current 

 on the west. 



El Puerto Rico. Consists of the large, rugged 

 island of Puerto Rico and several smaller 

 islands. Faces both Atlantic and Caribbean 

 but receives much greater wave action from 

 Atlantic. Coastline mostly steep and rocky, 

 but some areas have coral reefs and islands 

 sheltering lagoons, with some mangrove 

 swamp development. 



E2 Virgin Islands. Numerous islands mostly of 

 volcanic origin, but a few of marine sedi- 

 ments. Areas of steep rocky cliffs, some areas 

 with small sandy bays and rocky headlands, 

 some areas of wide low coastal plain and wide 

 shallow area covered by algae and turtle grass 

 or mangrove swamps. Beaches mainly rocky 

 or composed of calcareous sand. Well devel- 

 oped coral reefs. 



E3 Navassa Island. Small island of about 2.6 sq 

 km (1 sq mi) located between Jamaica and 

 Haiti in Caribbean Sea. Volcanic origin. 



E4 Serrana Bank and Roncador Bank. Coral reefs 

 352 km (220 mi) east of Nicaragua in the 

 Caribbean Sea. 



F Gulf of Mexico. The North and South Equa- 

 torial Currents join to form the Florida cur- 

 rent at the Yucatan Channel. Most of the 

 water goes directly to and out of the Straits 

 of Florida, but a small branch of the Florida 

 current circulates in the Gulf of Mexico and 

 affects this division. 



Fl Central Barrier Coast. Sandy beaches with a 

 few rocky areas, extensive marshy and 

 swampy areas present, narrow shallows area; 

 Juncus, Spartina, or mangroves characteris- 

 tic, depending on latitude. 



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