Abstract
AbstractAn artificial structure was discovered under a natural skylight inside Grutas de Tzinacamóztoc, in the vicinity of the archaeological site of Cantona. The structure is made up of piled rocks, defining a pentagonal enclosure with a central mound. Detailed measurements and computer modeling allowed tracing of the sunbeam path projected on the structure and on the cave floor, particularly for dates of astronomical and/or Mesoamerican calendrical importance. This corroborates the possible prehispanic use of this site as a complex and sophisticated gnomon.
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