Amazon-Orinoco-Southern Caribbean mangroves Amazon-Orinoco-Southern Caribbean mangroves The Amazon-Orinoco-Southern Caribbean mangroves (NT1401) is an ecoregion along the coasts of Colombia, Venezuela, Guyana, Suriname, French Guiana and Brazil. The Amazon-Orinoco-Southern Caribbean mangroves cover stretches of the northern, Caribbean, coasts of Colombia and Venezuela, and of the Atlantic coasts of Venezuela, Guyana, Suriname, French Guiana and northeast Brazil. It includes sections of the coasts of the Brazilian states of Amapá, Pará and Maranhão. The eastern part of the ecoregion makes up the Guianan-Amazon Mangroves global ecoregion, which in turn is made up of the Guianan mangroves, Amapá mangroves; Pará mangroves and Maranhão mangroves terrestrial ecoregions. Along
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