It would be constructive, since it creates more than it destroys.
See this article for more information on the Amazon:
http://www.freshwateraquariumplants.com/amazonbiotope/amazonriverfacts.html
rivers are both constructive and destructive
Volcanos I guess
they are made by both
hurricanes can be both constructive or destructive.
Plains are neither Constructive or destructive. they do not harm or majorly help. if there had to be one it would be constructive, it would help wildlife create stuff.
An earthquake in some sense is both constructive and destructive.
both constructive and destructive forces
constructive and destructive
both constructive and destructive forces
jetties are constructive forces
CONSTRUCTIVE
constructive and destructive forces build up and wear down the crust.
A cliff has neither constructive or destructive forces. However, a cliff was formed as a result of destructive forces eroding at the lands edge leaving a cliff.
Stone Mountain was formed through a series of constructive forces, like volcanic activity and uplift, which pushed the rock to the surface. Over time, destructive forces such as erosion have shaped the mountain into its current form, exposing the granite structure we see today.
constructive
It is made of both constructive and destructive forces... :)
They are neither. They form however as a result of weathering and erosion which could be considered "destructive" forces.
destructive