The site of Cuicuilco is dominated today by the massive circular temple pyramid or mound.
The structure was constructed sometime in the 5th century BCE (confirmed by radio-carbon dating).
On that basis alone, the Atlantean claims are dubious.
According to the latest posts, these artefacts were discovered decades ago as archaeological teams moved inward and removed debris that was characteristically preserved by Mayan temple builders as they rebuilt the structures over time.
Located in the inner rooms and spaces of a particular temple in Mexico, the collection of statues, masks and plaques were recognized to be evidence of Mayan contact with extraterrestrials and therefore hidden from the public, lest we all freak out.
Much of this ancient knowledge was lost when Spanish conquistadors laid waste to the extensive Maya libraries and administrative centres, but, fortunately, the Maya recorded parts of their history and predictions in stone inscriptions that can be seen today in stelae and the remains of elaborate cities, buildings and temples that survived centuries of jungle encroachment.
While the beginning of the early habitation is open to debate, the Maya Long Count Calendar gives a Maya creation date of 11 August, 3114 BC, and traces of Maya habitation at Cuello, in Belize, were recently carbon dated to around 2600 BC.