The middle reaches of Caņo Cocuinita, a typical blackwater caņo in the northwestern delta. Blackwater

streams are characterized by having low sediment but high tanic acid concentrations. Note that the entire

area is covered by low forest, which is common in the middle delta. Photograph taken in October 1998.

Please send comments, questions, or suggestions to Edgar Guevara.
Copyright 1998 Bureau of Economic Geology