First, the pH of fresh KC suspensions revealed a strong trend with depth ( Fig. 2A and Table S4 ), with the pH of clay from greater depths significantly higher than for samples from depths of 0 to 8 ft (pH 9.5 versus pH 8.0; P < 0.0001).
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First, the pH of fresh KC suspensions revealed a strong trend with depth ( Fig. 2A and Table S4 ), with the pH of clay from greater depths significantly higher than for samples from depths of 0 to 8 ft (pH 9.5 versus pH 8.0; P < 0.0001).