Subsoil
Bouvier's Law Dictionary and Concise Encyclopedia · John Bouvier; revised by Francis Rawle · 1914
Bouvier's Law Dictionary and Concise Encyclopedia
The word includes, prirna facie, all that is below the actual surface, down to the centre of the earth.
17 L. J. C. P. 162.
It is a wider term than mines, quarries, or minerals.
2 L. R. Ir. 339.