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Varve Analysis This technique was developed by Swedish scientists in the early 20th century.
Optical and SEM imaging of tool marks indicates that the skull has been cut from a rock crystal block using machine lapidary techniques unavailable to pre-Columbian artisans, whereas the anthropomorphic head has more likely been carved and polished with manual techniques comparable to ancient ones.
Thus the converging micro-topographical examinations and hydrogen profiles of the samples surfaces indicate that the skull is probably not a pre-Columbian artefact but has been carved in the 18th or 19th century.
The anthropomorphic head, on the other hand, could have been carved in the pre-Columbian period.
Relating to Atlantis studies, we find that Jürgen Spanuth applied typology to the weaponry and dress of the Sea Peoples as portrayed at Medinet Habu to support his theory that they came from Northern Europe.
Absolute dating began with the introduction of radiometric dating methods beginning with radiocarbon dating developed by Willard Libby in 1949.
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It can be achieved through the use of historical records and through the analysis of biological and geological patterns.