# From Freeze and Cherry (1979) - see Tables 2.2 and 2.4		
# Perm values are the mean of the log10 of the range provided, porosity values are the mean of the range provided
key                      Perm      Porosity
gravel_coarse            -         0.3
gravel_fine              -         0.32
sand_coarse              -         0.39
sand_fine                -         0.45
silt                     -         0.48
clay                     -         0.47
sandstone                1.14E-05  0.18
siltstone                -         0.31
limestone_dolomite       3.61E-05  0.2
limestone_karst          -         0.2
shale                    1.14E-08  0.2
gravel                   3.61E+01  -
sand_clean               3.61E-01  -
silty_sand               3.61E-02  -
silt_loess               1.14E-04  -
glacial_till             1.14E-06  -
clay_unweathered_marine  3.61E-08  -
unfractured_meta_igneous 1.14E-09  -
fractured_meta_igneous   1.14E-03  -
