No reason why they should depict a pre-Flood creature that seems to gave become extinct in the Flood, since there's no reason to expect that the rock art could have survived the Flood. However, eerie human-like and animal creatures DO suggest something antediluvian. Hm. On the other other hand the area is stacked with strata, which of course were formed by the Flood....
Kind of a conundrum, huh???
HBD
Whoever calls me ignorant shares my own opinion. Sorrowfully and tacitly I recognize my ignorance, when I consider how much I lack of what my mind in its craving for knowledge is sighing for... I console myself with the consideration that this belongs to our common nature. - Francesco Petrarca
"Nothing is easier than to persuade people who want to be persuaded and already believe." - another Petrarca gem.
Ignorance is a most formidable opponent rivaled only by arrogance; but when the two join forces, one is all but invincible.