FlyingHighNow - Sorry to appear to totally dismiss what your father said. No disrespect is intended.
However, even the top of Mount Everest is covered in ......... wait for it........sea shells.
Many of the highest mountains on the planet have an abundance of sea shells on them.
The Earth has suffered massive land and oceanic shifts in time spells that are difficult for us to even imagine.
I don't for one minute doubt what your father says is true, that the sea once covered Texas.
But a long time ago, the Mediterranean was a desert.
History is nothing of what we are told and absolutely 'massive' to comprehend the real forces at work and timescales involved on our planet.
We, homo sapien sapien, are just a small 'itch' on this planet's back.
In the past there may well have been nuclear wars, cataclysmic weather and geological shifts and civillisations that have come and gone that we will never ever know about.
Five million years old 'modern man' foot prints that are fossilised exist.
Gold chains, walls, evidence of past civillisations exist deep underground frequently found in mines.
This planet's history and the very history of ourselves is so fascinating that when we even begin to scratch the surface of our past a gasp of sheer awe can't help but exist.
Once we escape the so called history that our governments and educational establishments want us to believe in, then we begin to see that our manipulation is only complete IF we allow it!
Once we even begin to allow doubt to enter our minds over what we are told, only then do we take the very first baby steps to mental freedom.
Maybe we won't be able to change what is being forced on us......but we don't have to believe or even accept it.