Platinum group element enrichments and possible chondritic Ru:Ir across the Frasnian-Famennian boundary, western New York State
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The Frasnian-Famennian boundary is recognized as the culmination of a global mass extinction in the Late Devonian. In western New York State the boundary is a distinct horizon within a pyritic black shale bed of the upper Hanover Shale defined by the first occ... ...
