Fig. 3 in The changing course of the Amazon River in the Neogene: center stage for Neotropical diversification

Fig. 3. Principle landforms controlling basin connectivity in northern South America. Structural arches (dashed lines) of diverse geological origins partially bounding sedimentary basins. Sedimentary basins in orange draining to the Caribbean; in yellow to the Atlantic. Structural arches and sedimentary basins from Costa Menegazzo et al. (2016) and Jaramillo et al. (2017). Note the Guiana Shield is composed mostly of the northern Amazon Craton, the Brazilian Shield by the southern Amazon craton, and the Atlantic Shield by the São Luís, São Francisco, Luís Alves and Río de la Plata cratons, all overlaid in parts with Paleozoic sedimentary formations.