vendredi 10 janvier 2025

Outside the Scope of My Carbon Tables


I heard on a video about the Manot Cave being "35 000 years old" and what the article was:

Early human collective practices and symbolism in the Early Upper Paleolithic of Southwest Asia
Omry Barzilai, Ofer Marder, José-Miguel Tejero, +22, and Israel Hershkovitz
December 9, 2024 | 121 (51) e2404632121
https://www.pnas.org/doi/10.1073/pnas.2404632121


Why so? 35 000 BP = 33 000 BC, and that's on my tables?

Well, it's still outside the scope, because there is no apparent carbon date. Carbon 14, that is.

Isotopic analysis of calcite crusts on the boulder’s grooves revealed alignment with values found in speleothems from the cave dated to ~37 to 35 ka BP.

...

To further refine the dating of the anthropogenic engravings, we compared the isotopic composition (δ18O and δ13C) of the calcite crust samples taken from the boulder to the ones obtained for well-dated speleothems deposited in other parts of the cave (SI Appendix, 9). The isotopic values for the crust within the grooves (postengravings) on the boulder ranged between −4 and −5‰ for δ18O and from −8 to −10‰ for δ13C (SI Appendix, Fig. S14D). These values closely matched those of the speleothems deposited in Manot Cave approximately between ~ 37 to 35 ka (SI Appendix, Fig. S14C) (48).


Unlike carbon dated material, I do not here propose to give a real age, beyond the fact that 35000 years ago is a non-extant date, "before Creation" and therefore inflated./HGL

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