OrganicMonkey
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West JB, Hurley JM, Dudas FO, Ehleringer JR. The stable isotope ratios of Marijuana. II. Strontium isotopes relate to geographic origin. Journal of Forensic Sciences 2009;54(6):1261-1269. [Editor’s Notes: The 87Sr/86Sr ratio of marijuana samples grown in 79 counties across the United States was analyzed to determine if a primary geological signal is retained in marijuana, which could therefore be useful for geographical sourcing. The marijuana results were compared with modeled bedrock 87Sr/86Sr values based on 87Rb decay rates and a generalized geological map of the USA. A significant correlation was observed between marijuana 87Sr/86Sr and modeled bedrock 87Sr/86Sr. Although values clustered near the 1:1 relationship, there was a predominance of possible anomalies, perhaps attributable to carbonate bedrock. A small number of negative anomalies were also observed, which were generally associated with granitic bedrocks. These results suggest that strontium isotopes in marijuana record the geographical origins of marijuana, and that refinement of the base strontium map (or strontium isoscape) and improved understanding of other strontium sources would be productive. Contact: Department of Biology, University of Utah, Salt Lake City, UT 84112, USA.]
I thought this was interesting, if anyone had trouble reading this. The piece says that they can identify where outdoor cannabis was grown. I would think around my area, it would look like many other counties!
I thought this was interesting, if anyone had trouble reading this. The piece says that they can identify where outdoor cannabis was grown. I would think around my area, it would look like many other counties!