Marmes Rockshelter

In order to examine the possibility of a time-related depositional eflFect, we analyzed a series of samples from throughout a stratigraphic column at Marmes Rockshelter (45-Fr-50), a site located approximately halfway between Wawawii and Lind Coulee. At Marmes we were able to sample deer and pronghorn antelope throughout a period of more than 7000 years. The results appear in Figures 5 and 6. No significant time-related variation was indicated for either strontium or barium. 

Figure 5. (top Strontium concentration vs. age for terrestrial mammal hone samples from the Marmes Rockshelter, Each point represents a single sample. The error bars represent the standard deviation based on the statistics of radioactive decay. 

Figure 6. fbottom) Barium concentration vs. age for terrestrial mammal bone sample from the Marmes Rockshelter... 

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See also in sourсe #XX -- [ ]

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