Table 2 Most common representative values of K for carbonate aquifers and other sedimentary rocks⁶.

Karst and reef limestone

1 × 10⁻⁶ to 2 × 10⁻²

Limestone, dolomite

1 × 10⁻⁹ to 6 × 10⁻⁶

Sandstone

3 × 10⁻¹⁰ to 6 × 10⁻⁶

Siltstone

1 × 10⁻¹¹ to 1.4 × 10⁻⁸

Salt

1 × 10⁻¹² to 1 × 10⁻¹⁰

Anhydrite

4 × 10⁻¹³ to 2 × 10⁻⁸

Shale

1 × 10⁻¹³ to 2 × 10⁻⁸