An AP article announces the find by scuba divers of what may be Aztec offerings deep in a volcanic crater lake west of Mexico City. The snow-capped volcano lies at 13,800 feet above sea level.
Research is being led by Stanislaw Iwaniszewski of the National Institute of Anthropology and History of Mexico. Among the finds are lightning bolt-shaped scepters, copal incense, obsidian knives, and maguey cactus spines.
The lightning bolt scepter indicate offerings to the rain god Tlaloc (Chac is the Maya equivalent). Obsidan knives were traded through Mesoamerica. The cactus spines would have been used in blood letting.
Some of the materials are said to date to 100 BCE, which of course is more than a millennium before the appearance of the Aztecs (who headline the AP article).