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Specimens spanning 10 m across the Cretaceous/Tertiary (K/T) boundary in Core 32 at DSDP Site 527, Walvis Ridge, were analyzed for trace elements and for evidence of shock deformation. Results from INAA/RNAA chemistry of the 45 samples suggest that multiple events are recorded at this site, including at least two enrichments of chalcophile elements possibly related to basaltic volcanism. A major event, coincident with the paleontological K/T boundary, is marked by a strong Ir anomaly and high frequency of shock deformation in quartz and feldspar. A strong secondary peak in elemental enrichment and mosaicism occurs at 1.87 m below the...

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