I have recently asked a question about creating a sea on a mountaintop. I have come to realize that I would run with some problems by doing this, namely about the salinity of the lake. I want that thread to stay on topic, so I'll post this question here, and possibly will edit the first question accordingly.
So without further ado, let's try to provide some context:
- Cosmic background: An Earth-like planet, with a Moon like ours, orbiting a Sun like ours
- Geographical background: There's a continent (its size doesn't matter) on the Southern hemisphere with a north shore on the equator. On that shore, next to the ocean, there is a mountain. On the mountaintop there is a basin.
I want to create a permanent salt lake / sea on that basin... and to build a city on the shores of said lake / sea.
- Mountain's altitude from sealevel to mountaintop: 1.000 meters
- Basin's radius: 100 Km
- Basin's maximum depth: 100 meters
- Water source: Primarily from rain (I guess that, being on the equator, it is quite rainy)
Now, I have two questions:
- Is such a lake possible? (Note: Not probable... possible)
- How could such lake come to be formed? (Note: Having the lake form on the sealevel and then being lifted by some kind of geographical phenomenon is acceptable, as long as it remains steadily saline overtime)
To answer both this questions, it is acceptable to tamper with any of the parameters that I posted here, with two exceptions: a) The altitude must be suficiently high to be a mountain, but suficiently low to receive rainwater; b) the lake surface may be greater, but not lower than posted.
Other than that, feel free to change the altitude, radius, depth or even imagine alternative water sources (remember that you're on a mountaintop) to achieve the desired goal.
It is not acceptable to change anything on the Cosmic or Geographical background.