Demographics of South America from Spain. South America is also home to 124 million Castizo, Mestizo or Caboclo people (citizens whose DNA is mostly European spanning from 65 to 90% European genes with considerable Indigenous admixture) and 27 million people with pure Indigenous extraction, mostly found in Peru, Bolivia, Ecuador, Chile and parts of Argentina. Mestizos make the majority in Paraguay, Venezuela, Colombia and Ecuador. Black phenotype and Mulatto population are respectively 18 and 48 million, when combined 66 million. Mulattos have a range of 60 to 80% European genes and are mostly found in Brazil, Colombia, Venezuela, Ecuador, Guyana, Suriname and French Guiana
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