Dating the Hueyatlaco Archaeological Site
Hueyatlaco Archaeological Site
A US Geological Survey team, consisting of Harold Malde, Virginia Steen-McIntyre, and Roald Fryxell, working under a grant from the National Science Foundation, assigned dates of 250,000 year B.P. for these artifacts. These geologists stated that four different dating methods independently yielded an anomalously great age for the artifacts found near Valsequillo. The dating methods used were:

1.    uranium series dating
2.    fission track dating
3.    tephra hydration dating
4.    study of mineral weathering

The date of 250,000 years obtained for Hueyatlaco by the US Geological Survey team provoked a great deal of controversy. If accepted, it would have revolutionized not only New World anthropology but the entire picture of human origins, since human beings capable of making the sophisticated tools found at Hueyatlaco are not thought to have come into existence until about 100,000 years ago in Africa.

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