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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