French Guiana capita that year, and 56.5% of the metropolitan French regions outside the Paris Region. French Guiana's population of 281,612 (2018 estimate), most of whom live along the coast, is very ethnically diverse. At the 2014 census, 57.3% of the inhabitants of French Guiana were born in the region, 9.3% were born in Metropolitan France, 3.0% were born in the French Caribbean departments and collectivities (Guadeloupe, Martinique, Saint Martin, Saint Barthélemy), and 30.2% were born in foreign countries (primarily Suriname, Brazil and Haiti). Estimates of the percentages of French Guiana ethnic composition vary, a situation compounded by the large proportion of
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