翻訳と辞書
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・ List of rivers of Jordan
・ List of rivers of Kansas
・ List of rivers of Kazakhstan
・ List of rivers of Kentucky
・ List of rivers of Kenya
・ List of rivers of Kerala
・ List of rivers of Korea
・ List of rivers of Kyrgyzstan
・ List of River City characters
・ List of river cruise ships
・ List of River King video games
・ List of river name etymologies
・ List of River-class frigates
・ List of rivers and estuaries in Metro Manila
・ List of rivers and nullahs in Hong Kong
List of rivers by age
・ List of rivers by continent
・ List of rivers by discharge
・ List of rivers by length
・ List of rivers discharging into the North Sea
・ List of rivers in India by discharge
・ List of rivers in Ostwestfalen-Lippe
・ List of rivers in Western Sahara
・ List of rivers named Sainte-Anne
・ List of rivers of Acre
・ List of rivers of Afghanistan
・ List of rivers of Africa
・ List of rivers of Alabama
・ List of rivers of Alagoas
・ List of rivers of Alaska


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List of rivers by age : ウィキペディア英語版
List of rivers by age
This is a selected list of the oldest rivers on Earth for which there is knowledge about their existence in past times.
== Determination of age ==

The age of a river is difficult to determine. Generally, the age is estimated based primarily upon the age of any mountains it dissects; the age of the sea or ocean to which it eventually outflows can be irrelevant; for example, several rivers of the east side of the Appalachian Mountains are older than the existence of the Atlantic Ocean, which did not exist 130 million years ago. If a river fully dissects a mountain range, then this generally indicates that the river existed at least at the time that the mountain range rose.

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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