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University of Arizona confirms spherule concentration in lower YDB sediments at famed Clovis site Blackwater Draw

Blackwater Draw The presence of a high number of the hollow magnetic microspherules can be used for identification of the LYDB. Although some scientists failed to find any microspherules at all along the LYDB in the BWD-1 site (Surovell et al. 2009), others reported strongly elevated concentrations of the magnetic microspherules here (Firestone et al. 2007; LeCompte et al.
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Corrections to Bunch et al 2021

Overholt & Melott 2013

Charles Appleton Day

2021 Tall el-Hammam study makes final Jeopardy! question