French Guiana French Guiana French Guiana (pronounced or , ; ) is an overseas department and region of France, on the north Atlantic coast of South America in the Guyanas. It borders Brazil to the east and south and Suriname to the west. Since 1981, when Belize became independent, French Guiana has been the only territory of the mainland Americas that is still part of a European country. With a land area of , French Guiana is the second-largest region of France and the largest outermost region within the European Union. It has a very low population density, with only . Half
Geology of French Guiana the Paramaca series, which corresponds to a series of micaschists, aluminous paragneisses and black quartzites whose total thickness is about 1 km. The central granite massifs consist of granite plutons, granodiorites and quartz diorites dating from 2.05 to 2.15 billion years ago. The north of French Guiana corresponds to a synclinorium composed of the Paramaca series on which sandstone and fluviatile conglomerates lie unconformably. Shield rocks in Guyana are all dated between 1.6 and 2.5 billion years ago. The Quaternary lands are located in the northern part of Guyana, near the coast, unconformably on the Paleozoic lands. The coastal plains