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Map showing tentative threshold values

By St. Petersburg Coastal and Marine Science Center
Map showing Calcium, Manganese, Phosphorous, and Strontium values
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Detailed Description

Map showing tentative threshold values (Calcium >= 13000 ppm, Manganese >= 463 ppm, Phosphorus >= 580 ppm, and Strontium >= 170 ppm) used to identify where naturally occurring outbreaks are "more likely" to occur than in other locations, with all other variables held constant.

Sources/Usage

Public Domain.