Dave-
remember tectonic plates are also shifting along fault lines, and lifting up the land in places. So not only is the sea level lower, but the land is
also higher in places.
Just observe the 'wave cut terraces" on the west coast of Baja, showing the "steps" where the sea level has literally cut terraces into the land at
various elevations. Then look at the uplift on the east coast, where the subduction of plates along the San Andreas fault line is lifting/tilting the
entire peninsula.
So- all these ancient sea beds are at various elevations not only due to sea level changes, but tectonic plate dynamics/geologic shifting.
Quote: Originally posted by David K  | ...
The sea lever used to be 600 feet higher than now... I can show you fossil sea shells at 600 foot elevation points in the desert near San Felipe and
the Imperial Valley. When the sea really does rise, it will be just going back to where it was a few million years ago. | |