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Over unmineralized bedrock, the B 1 soil horizon has the highest mean (22 ppm) and widest range (0-70 ppm) of arsenic values. 'The arsenic contents of the B and C horizons (up to 3500 ppm As above sulfide deposits) give a more reliable measure of nearby sulfide mineralization than those of the As horizons.' Beudantite was identified in coatings on soil grains in the upper B horizons. Much of the arsenic is apparently associated with iron oxides, probably in an absorbed form.
This record provided courtesy of AGI/GeoRef.
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