Extended Data Table 1 Chronometric data ordered by strata and depth

From: Evidence of human occupation in Mexico around the Last Glacial Maximum

  1. % Collagen yield, percentage yield of extracted collagen as a function of the starting weight of bone samples. C:N, atomic weight ratio of carbon to nitrogen. %C is the percentage of carbon in the combusted sample. Stable isotope ratios of C and N are expressed in per mille (‰) relative to Vienna Pee Dee Belemnite and atmospheric N2 (AIR). The calibrations were done using the OxCal 4.3 software44 and the IntCal13 calibration curve45. *Missing chronometric data, owing to a lack in reporting or measurements on behalf of the laboratories. As per the Methods, strata for samples within SC-B were assigned following excavation and geological analysis.
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