Parameters

Red sandstones

White sandstones

Purple sandstones

Sandstone with intercalation of pelites

GSI

44

51

42

20

s

0.002

0.004

0.002

0.000

a

0.50

0.50

0.50

0.55

σ_cm (MPa)

5.62

10.36

5.5

2.52

m_i

19

19

19

9

m_b

2.57

3.30

2.39

0.52

σ_t (MPa)

−0.049

−0.089

−0.042

0.000