Table T1. Elastic constants.
Elastic constant
Value
Shear modulus of quartz 44 Gpa
Bulk modulus of quartz 38 Gpa
Shear modulus of clay 6.85 Gpa
Bulk modulus of clay 20.9 Gpa
Bulk modulus of water 2.29 Gpa
Bulk modulus of gas 1.11 x 10–4 Gpa
Density of quartz 2.65 g/cm3
Density of clay 2.58 g/cm3
Density of water 1 g/cm3
Density of gas 7.78 x 10–4 g/cm3

Note: From Lee, 2004.