Even more excitingly, the team believes that this stash is the oldest known example of a mammoth trap or ambush, set by our ancestors over 14,000 years ago.
Mexico's National Institute of Anthropology and History announced Wednesday that it had verified the remains of the extinct giants that date back over 15,000 years.
The discovery "represents a watershed, a turning point in what we until now imagined to be the interaction between hunter-gatherers with these huge herbivores", Diego Prieto Hernández, director of the institute, said in a statement.
Thus far 824 mammoth bones have been discovered on the site, situated in the San Antonio Xahuento district. Once the animal was separated, they would coax it into the human-built traps, kill it and then use it for food and other purposes. Radar surveys of surrounding mammoth grave sites could reveal the presence of similar traps.
The Tultepec site, by contrast, offers "evidence of direct attacks on mammoths", Luis Córdoba Barradas, the leader of the excavation, told reporters, according to the Guardian's Jo Tuckman.
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The massive beasts would be pushed into the traps by 20-30 hunters, armed with spears and flaming torches, before they were butchered.
Some of the bones showed signs of butchery.
Archeologists found evidence that the mammoths' rib bones were used to cut the meat, the internal organs were also eaten, and that the reason why some mammoth skulls were found upside down is because hunters also consume the animal's tongue, which weighed around 12 kilograms.
It was unclear if plans for the garbage dump would proceed.
Further research is needed to determine whether there are more mammoth traps nearby.