benkostka
Jedi Master
It’s more likely the soil salinity increased from modern agricultural techniques which would destroy soil structure and then trap the salts in the top portions of the soil. If the city was set up by lizards for their workers, it’s likely they were using the same agricultural techniques then that are destroying our soils today.I have an just an idea of where all the salt came from but it seams improbable. Is it possible that a massive tsunami pushed it's way up the valley and flooded the city and surrounding land? That's a ~300 km journey though.
Some information if you’re interested.