Figure 11. Linear plot of Fe and Zn data (in weight percent).

Lab 1 used a leachate technique, and Lab 2 used a total dissolution technique. Lab 3 data included only Zn. The arrows point to high Zn values at approximate Fe ranges. These high Zn values, along with other anomalous Zn/Fe values shown in the graph, are mainly attributed to influence of pollutants in samples affected by discharge from New Orleans canals.

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