# Strontium isotope ratios of Chaco construction beams and source-area trees

> Ratios for spruce and fir beams and modern trees (English et al. 2001) and for ponderosa pine (Reynolds et al. 2005), published as tables in the papers…

Source: https://mysteriesdept.com/datasets/DAT0D9KVA767ZTW/strontium-isotope-ratios-of-chaco-construction-beams-and  
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# Strontium isotope ratios of Chaco construction beams and source-area trees

Ratios for spruce and fir beams and modern trees (English et al. 2001) and for ponderosa pine (Reynolds et al. 2005), published as tables in the papers and their supplements; English 2001 is free in PubMed Central (PMC59738). No consolidated machine-readable release was found. Analyses it supports: mixing models of source contributions by period and great house, combined with the ring-width sourci

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