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CALC
Calcareous class of parent material

(ref: ECSS, 1987).

0: Noncalcareous
No CaCO₃ detectable with dilute HCl.
1: Weakly
1-5% CaCO₃ equivalents (weak effervescence with dilute HCl).
2: Strongly
6-40% CaCO₃ equivalents (moderate to strong effervescence with dilute HCl).
3: Extremely
>40% CaCO₃ equivalents (very strong effervescence with dilute HCl).
#: Non-applicable
(water, rock, ice)

effective Version 1.0 Contact: Peter Schut