Quizzes & Puzzles1 min ago
Colours Of The Saône And The Rhône
6 Answers
Yesterday I did a boat trip in Lyon, where the Saône and the Rhône meet. It was pointed out that the two rivers have different colours and this could clearly be seen.
Does anyone know why?
Thanks!
Does anyone know why?
Thanks!
Answers
Assuming that it's natural (rather than due to pollution) it must be because the river valleys lie across different surface geologies, so that the rivers pick up different chemical elements as their waters abrade the surfaces of the rocks over which they pass. Switzerland and France have complex surface geologies:...
15:28 Mon 17th Aug 2015
Assuming that it's natural (rather than due to pollution) it must be because the river valleys lie across different surface geologies, so that the rivers pick up different chemical elements as their waters abrade the surfaces of the rocks over which they pass.
Switzerland and France have complex surface geologies:
https://upload.wikimedia.org/wikipedia/commons/thumb/8/8b/France_geological_map-fr.svg/2000px-France_geological_map-fr.svg.png
Switzerland and France have complex surface geologies:
https:/