source: https://decolonialatlas.wordpress.com/2017/04/18/colorful-river-basin-maps/
It has more detailed maps for each continent too.
source: https://decolonialatlas.wordpress.com/2017/04/18/colorful-river-basin-maps/
It has more detailed maps for each continent too.
Seems like the sand dunes got locked in place by vegetation at some point. It was shaped by the wind whe it was even drier than today, but then stopped moving when there was just enough moisture for plants to get a hold of things