Stratigraphic age Q0 value lithology

Sinian Cambrian

Ordovician

Silurian

Devonian

Carboniferous

Permian

Triassic

Jurassic

Cretaceous

Tertiary

Quaternary

sandstone

0.00

0.05 - 0.15 (0.10)

0.15 - 0.30 (0.22)

0.30 - 0.50 (0.40)

0.40 - 0.60 (0.50)

0.50 - 0.70 (0.60)

0.70 - 0.85 (0.78)

0.85 - 0.95 (0.90)

0.95 - 1.00 (0.98)

shale

Marl

0.00

0.10 - 0.30 (0.20)

0.30 - 0.50 (0.40)

0.50 - 0.70 (0.60)

0.60 - 0.80 (0.70)

0.70 - 0.85 (0.78)

0.85 - 0.95 (0.90)

0.85 - 0.95 (0.90)

sandy

shale

0.00

0.10 - 0.20 (0.15)

0.20 - 0.40 (0.30)

0.40 - 0.60 (0.50)

0.50 - 0.70 (0.60)

0.60 - 0.80 (0.70)

0.80 - 0.90 (0.85)

0.85 - 0.95 (0.90)