October 22, 2019

Pre-Columbian Lead Pollution at Kincaid Mounds

Researchers at the site of Kincaid Mounds and at the Avery Lake site (1150-1450 CE) found that the inhabitants of those site are responsible for 1.5 metric tons of lead pollution deposited in Avery Lake near the Ohio River. The lead came from galena deposits in southeastern and central Missouri and the upper Mississippi Valley. Galena is a lead sulfite mineral that is silvery and sparkly. It was ground and used to paint objects, buildings and personal adornments. Galena powder was blown into the lake or washed into the lake. The research shows that the galena trade was very large and that most of the pollution came from galena traded from other regions

Physical.org has the report here;

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