o Marine Science Group Data Base
Neutron Activation Elemental values in parts per million by sample, age (pre Pleistocene)

o Marine Science Group Redox Interpretation
Elemental data placed in four groups related to variable oxidation-reduction conditions
Data plotted by groups in order of concentration and by comparison with "average" shale

o Other Black Shales Elemental Plots
Compilation of non Marine Science Group black shale analyses from published sources.

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Interested parties with data or with comments please E-mail using convenient form.