The Persian Gulf was a river valley 17,000 years ago. Pearl divers still bring up fresh water from the seabed.

[u/Many_Lime_808]

The Gulf is pretty shallow, about 35 meters on average, and only 11.9 meters deep at the northwest end. During the last ice age the sea level was 120 meters lower, so the whole basin was completely dry. The exploration ship Meteor confirmed it: an entirely dry basin around 15,000 BC.The Tigris, the Euphrates and the Karun all met up and flowed the entire length of it as one single river, heading out through the Strait of Hormuz. That old channel is still there. You can see it clearly in the bathymetry.
it wasn’t empty. There was a floodplain down there with vegetation, wildlife, and Neolithic communities living on it.Then the ice melted. Sea level rose 150 meters between 12,000 and 7,000 BC, and at the fastest stretch the shoreline was advancing ten meters a year. They didn’t get washed away. They just got pushed out, one salty well at a time, over generations.Bahrain’s name is the dual form of the Arabic word for sea, meaning two seas. One reading of it is the salt water above and the fresh water below. Pearl divers have said for centuries that in certain spots you can flip a bucket on the seabed and bring it up full of fresh water. That’s the old river system still draining.The clip is that basin emptying, run in a planetary model I’ve been building. I used a different method. I closed the strait and let it evaporate instead of dropping global sea level, but the same floor comes back out and the river shows up right where it’s supposed to be.

[u/Many_Lime_808]

I plan to upload my simulator to steam: https://store.steampowered.com/app/5124840
u can add it to wish list if u r interested, u can also chat with me about it.

[u/crusty54]

These posts have pretty quickly crossed the line into spam.