Datura quids at Pinwheel Cave, California, provide unambiguous confirmation of the ingestion of hallucinogens at a rock art site

Robinson, David W. and Brown, Kelly and McMenemy, Moira and Dennany, Lynn and Baker, Matthew J. and Allan, Pamela and Cartwright, Caroline and Bernard, Julienne and Sturt, Fraser and Kotoula, Elena and Jazwa, Christopher and Gill, Kristina M. and Randolph-Quinney, Patrick and Ash, Thomas and Bedford, Clare and Gandy, Devlin and Armstrong, Matthew and Miles, James and Haviland, David (2020) Datura quids at Pinwheel Cave, California, provide unambiguous confirmation of the ingestion of hallucinogens at a rock art site. Proceedings of the National Academy of Sciences, 117 (49). pp. 31026-31037. ISSN 1091-6490

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    Abstract

    While debates have raged over the relationship between trance and rock art, unambiguous evidence of the consumption of hallucinogens has not been reported from any rock art site in the world. A painting possibly representing the flowers of Datura on the ceiling of a Californian rock art site called Pinwheel Cave was discovered alongside fibrous quids in the same ceiling. Even though Native Californians are historically documented to have used Datura to enter trance states, little evidence exists to associate it with rock art. A multianalytical approach to the rock art, the quids, and the archaeological context of this site was undertaken. Liquid chromatography- mass spectrometry (LC-MS) results found hallucinogenic alkaloids scopolamine and atropine in the quids, while scanning electron microscope analysis confirms most to be Datura wrightii. Three-dimensional (3D) analyses of the quids indicate the quids were likely masticated and thus consumed in the cave under the paintings. Archaeological evidence and chronological dating shows the site was well utilized as a temporary residence for a range of activities from Late Prehistory through Colonial Periods. This indicates that Datura was ingested in the cave and that the rock painting represents the plant itself, serving to codify communal rituals involving this powerful entheogen. These results confirm the use of hallucinogens at a rock art site while calling into question previous assumptions concerning trance and rock art imagery.

    ORCID iDs

    Robinson, David W., Brown, Kelly, McMenemy, Moira, Dennany, Lynn ORCID logoORCID: https://orcid.org/0000-0002-5481-1066, Baker, Matthew J. ORCID logoORCID: https://orcid.org/0000-0003-2362-8581, Allan, Pamela ORCID logoORCID: https://orcid.org/0000-0003-4989-2698, Cartwright, Caroline, Bernard, Julienne, Sturt, Fraser, Kotoula, Elena, Jazwa, Christopher, Gill, Kristina M., Randolph-Quinney, Patrick, Ash, Thomas, Bedford, Clare, Gandy, Devlin, Armstrong, Matthew, Miles, James and Haviland, David;