How did vast salt deposits develop in the sahara

What are contributions made by rene descartes

This was the selling of large tracts of georgia land along a river in present-day mississippi from 1795 to 1803 at extremely low prices by georgia governors and the state legislature.

In the early 1800s which person would most likely express a positive viewpoint on abolition if interviewed a a. a runaway slave b. a plantation owner c. a southern politician d. a temperature reformer