Fig. 5
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Cross diagram for the formations 52 and 55, with panel A opposing the enrichment factors in U and Mo, and indicating anoxic-euxinic conditions of deposition (following Algeo and Tribovillard, 2009). Panels B and C show the relations between Cu-EF and the S content (B) or the Fe:Al ratio (C). The formation names are listed in Table 1.
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