For 10 points-name this longest river of Venezuela.
Its name is derived from the Guarauno meaning "a place to paddle," since it is one of the few major navigable rivers in the region.  It begins on Mount Delgado Chalbaud, passes through stone plateaus called tepuys on its way through the Guyana Shield, forms part of the border with Colombia, and enters the Caribbean through a delta after traversing the planes known as the llanos.  For 10 points-name this longest river of Venezuela.
Its name is derived from the Guarauno meaning "a place to paddle," since it is one of the few major navigable rivers in the region.  
Orinoco River