Borders of Suriname in the treaty was the result of an arbitration process that was headed by King Victor Emmanuel III of Italy. The treaty was signed in Rio de Janeiro on May 5, 1906. Brazil and the Netherlands both ratified the treaty in 1908. Borders of Suriname The borders of Suriname are subject to longstanding disputes between Suriname and its neighbouring countries Guyana and France (via French Guiana). Only the border with Brazil has been uncontroversial since 1906. In 1860, the question was posed from the French side, which of the two tributary rivers of the Marowijne River (also called Maroni and
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