Collins. Poroelastic.
N J I T Z
5 5 1 0
3
  0    0     0     0   0   0   0
  0 1500     0     0   0   1   0 
100 -1 -1 0 0 0 0 0              # Cp<0 Cs<0 flag poro-elastic layer
1 2.25E9 3.8755721E-11 1.5 1.1457468E10 .3 1.0E-10 
-1.E-5 1.511997E9 1.650237E9 0.53165258 0.17114801 1.0

85
85 85 1 1
100 1E8
-1 1 950
0 10 20 2
30 90 12 10
0 3000 12 500
0 250 12 50