There is evidence of the Mediterranean Basin flooding after breach of a land bridge across what is now the Strait of Gibraltar [1,2] some 5 million years ago. In the same way there is some evidence of the Black Sea rapidly expanding some 8000 years ago [3]. Similar 'catastrophic flood' scenarios have played out elsewhere on the planet which has led to the rise of flood myths like the Biblical flood. While Conservapedia goes heavy on scripture in laying out their proof for a historical basis for the flood (i.e. they are just as biased as Wikipedia tends to be on politically contentious subjects) it is a rational position to state that the myriad of flood myths around the world and along the ages are based on historical flood events.

In short, Conservapedia does what Wikipedia does but replaces the 'progressive' bias with a 'conservative' one.

[1] https://www.nationalgeographic.co.uk/science-and-technology/...

[2] https://en.wikipedia.org/wiki/Zanclean_flood

[3] https://en.wikipedia.org/wiki/Black_Sea_deluge_hypothesis