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Table 1

Covariance and cross-covariance model parametersa used in ordinary kriging (), cokriging (), bedrock kriging (), and kriging on residuals from Poisson's equation (). The observations were either normal score (*) or lognormal transformed (′)

Case
  0.077 0.726 2371 1.00 
  0.003 0.207 2402 1.01 
  0.003 0.207 2402 1.01 
  0.007 0.638 5865 1.02 
  0.35 0.750 2100 1.0 
  0.20 0.520 8000 1.0 
  20 200 4000 1.0 
Case
  0.077 0.726 2371 1.00 
  0.003 0.207 2402 1.01 
  0.003 0.207 2402 1.01 
  0.007 0.638 5865 1.02 
  0.35 0.750 2100 1.0 
  0.20 0.520 8000 1.0 
  20 200 4000 1.0 

a, and the semivariogram model are given by , where indicates either normal score or lognormal transformed sediment thickness , or the horizontal distance to the bedrock outcrop , , and X denotes the residuals between Poisson's equation and observations (Equation 7). The practical range = log(0.05) for all models.

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