Ascientific argument will be considered invalid if the evidence supporting the argument is based on

A scientific argument will be considered invalid if the evidence supporting the argument is based on independent data.
If you are only referring to a single scientist or a single study conducted on a certain topic, it means that it hasn't been researched enough for the argument to be reliable. Every scientist needs to refer to other studies and other scientists and their work if they want their arguments to be valid.

It was said to have happened by earthquakes, the shifts in the tectonic plates moved everything 

No you are not wrong