This is the kind of info that makes you sit up and think Dawn. scratchchin

I also remember reading about ancient decorated pottery found somewhere in Central or South America, that had dinosaur images depicted on them.

I also had a few thoughts into the Loch Ness monster and other Lake monsters from around the world. These creatures tend to be described as if coming from the extinct line of dinosaurs.
I offer a couple of thoughts on this:

It could be that in certain area's of the world there are certain conditions that allow for people to experience 'timeslips'. By that I mean these people get a view of what has gone before in our Earth history, or even a glimpse of the future is shown.They then have these visions in their conscious minds and can reproduce the images on pottery, glyphs etc, showing things which are not present in their version of time or reality.

or

Things from the past or future are projected into our reality for short periods of time, and are witnessed by a person/persons,and then the object returns to it's own time/dimension.

Just a couple of thoughts to ponder. scratchchin