Ancient Cities

If you look at a topographical map of the planet, the edge of the continental shelf is where the oceans met the land for two million years until the end of the ice age 20,000 years ago. Since that time, the oceans have risen about 300 feet, or more, There are the remains of cities on the continental shelf that at one time were exposed to the air, when the sea level was much lower. Some of these cities may be as almost as old as humanity itself.

copyright (c) 2016

William Schaeffer