MolaKule
Staff member
Better check your radioisotope theory. Carbon dating is only good to about 9 half-lives of C14 or about 50,000 years, and then even C14 dating is based on dubious assumptions.Of course they know. There's carbon dating along with the type of rock in which the water was found and the "impermeable" rock around it. They know by looking at the fossil record. Certain species for example only live in tidal areas (ex Coral) or say you find non-aquatic fossils (ex, ferns, woody plants, mammals) . So if you find fossilized coral or whatever 100, 500 miles off the current coastline then you have a fairly good idea of the depth of the ocean.
Other examples would be the Bering Land Bridge. The melting of glaciers caused ocean levels to rise so up until 12,000 years ago you could walk from Canada to Vancouver Island. This is geology.
"The half-life for 14C is approximately 5700 years, therefore the 14C isotope is only useful for dating fossils up to about 50,000 years old." http://www.biology.arizona.edu/biomath/tutorials/applications/carbon.html
As I stated earlier, attempting to recreate or to describe the conditions of the past is fraught with scientific problems, because the past conditions that existed are gone, and cannot be verified or recreated in any laboratory to support any theory of the conditions of the past.
In addition, if your conjectural theory about the past isn't falsifiable, then it cannot be considered science.