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'Applied to a land-form whose orientation is similar to that of the inferred original feature, but which has passed through a complex subsequent history.'[1]
![Paraná River Floodplain, Northern Argentina](http://upload.wikimedia.org/wikipedia/commons/thumb/c/c6/Paran%C3%A1_River_Floodplain%2C_Northern_Argentina.jpg/1007px-Paran%C3%A1_River_Floodplain%2C_Northern_Argentina.jpg)
- ^ A Dictionary of Ecology (4 ed.). Oxford University Press. 2010.