Question: which is the oldest river in the world
Answer: River Age ( Mya ) Outflow Most significant criterion for the age Finke 350 - 400 Lake Eyre ( intermittent ) Predates the Alice Springs Orogeny ; several other smaller rivers in the Northern Territory are of a similar age Meuse 320 to 340 North Sea Paleozoic , dissects the Ardennes during the Hercynian The Hercynian Orogeny mountain upflift was contemporary with the Appalachian - forming Alleghenian orogeny , both 320 to 340 ma .