PS - I have to disclose that I am at the creative end of the building industry and am somewhat one eyed on the subject
does that mean your a pencil sharpner?
Here is another example of the complexity of civilisation before the sea water rose.
Why do we hear so little about this sort of stuff in the media and why is it not throughly researched?
Perhaps if the research were to reveal the truth many of our modern institutions such as christianity would be debunked?
www.academia.edu/3779666/Ancient_Canal_Builders_-_Overview