stacking model example

stacking model example (used for GSN Station RAYN) 4 layers over a halfspace
4
50 145
5000 5500 -0.06 0 3070 -0.06 2700
0 0
8000 6350 0 0 3494 0 2700
0 0
21000 6420 0.02 0 3510 0.02 2700
0 0
40000 6930 0.03 0 3804 0.03 2700
0 0
220000 7900 -0.15 0 4300 -0.15 3350