B. Brazil

B. Brazil

Courtesy of NASA/GSFC/JPL, MISR Team.

http://visibleearth.nasa.gov/view_rec.php?id=1592


Close to the city of Manaus, Brazil, the Rio Solimoes and Rio Negro converge to form the Amazon River. Manaus is the gray patch to the right of image center.
The pale, murky color of the Rio Solimoes heralds its burden of glacial silt and sand, results from its origin in the Peruvian Andes mountains. The dark color of the Rio Negro is characteristic of clear waters that originate in areas of basement rock and carry little sediment. East of Manaus the pale and dark waters flow side-by-side as distinct flows before they eventually merge and mix. Northwest of Manas on the Rio Negro is the Anavilhanas Archipelago, the largest group of freshwater islands in the world.
Image from the Multi-angle Imaging Spectro Radiometer (MISR).