The cave contains some of the oldest known
cave paintings, based on
radiocarbon dating of "black from drawings, from torch marks and from the floors", according to Jean Clottes. Clottes concludes that the "dates fall into two groups, one centred around 27,000–26,000
BP and the other around 32,000–30,000 BP." Some archaeologists have questioned these dates. Christian Züchner, relying on stylistic comparisons with similar paintings at other well-dated sites, expressed the opinion that the red paintings are from the
Gravettian period (c. 28,000–23,000 BP) and the black paintings are from the Early
Magdalenian period (early part of c. 18,00010,000 BP). Pettitt and Bahn also contended that the dating is inconsistent with the traditional stylistic sequence and that there is uncertainty about the source of the charcoal used in the drawings and the extent of surface contamination on the exposed rock surfaces. Stylistic studies showed that some Gravettian engravings are superimposed on black paintings proving the paintings' older origins. By 2011, more than 80 radiocarbon dates had been taken, with samples from torch marks and from the paintings themselves, as well as from animal bones and charcoal found on the cave floor. The radiocarbon dates from these samples suggest that there were two periods of creation in Chauvet: 35,000 years ago and 30,000 years ago. This would place the occupation and painting of the cave within the
Aurignacian period. A research article published in
Proceedings of the National Academy of Sciences in May 2012 by scientists from the
University of Savoy,
Aix-Marseille University and the Centre National de Prehistoire confirmed that the paintings were created by people in the
Aurignacian era, between 30,000 and 32,000 years ago. The researchers' findings are based on the analysis using geomorphological and dating of the rock slide surfaces around what is believed to be the cave's only entrance. Their analysis showed that the entrance was sealed by a collapsing cliff some 29,000 years ago. Their findings put the date of human presence in the cave and the paintings in line with that deduced from radiocarbon dating, i.e., between 32,000 and 30,000 years BP. A 2016 study in the same journal examining 259 radiocarbon dates, some unpublished before, concluded that there were two phases of human occupation, one running from 37,000 to 33,500 years ago and the second from 31,000 to 28,000 years ago. All but two of the dates for the black drawings were from the earlier phase. The authors believe that the first phase ended with a rockfall that sealed the cave, with two more rockfalls at the end of the second occupation phase after which no humans or large animals entered the cave until it was rediscovered. In an email to the
Los Angeles Times two of the authors explained, In 2020, researchers used the new IntCal20 radiocarbon calibration curve to estimate that the oldest painting in the cave was created 36,500 years ago. In parallel with the dating carried out in Chauvet cave itself, from 2008 onwards, several members of the scientific team in charge of studying the cave undertook chronological research in other rock art sites along the Ardèche river gorges under the direction of Julien Monney. It took place at Points cave (Aiguèze; Gard; France), which presents flagrant iconographic similarities with Chauvet cave, but also at Deux-Ouvertures cave. Under the name of "Datation Grottes Ornées" (or DGO) project, this research is intended to determine the context in which the rock art caves of the region were visited. The DGO project proposes to discuss the apparent chronological and iconographic exceptionality of Chauvet cave "from the outside" by placing it within a regional ensemble. This research is still in progress (2020). However, it has already produced many results indirectly concerning the chronology of Chauvet cave. == Preservation ==