Cujust est solum, ejus est usque ad inferos
Defined in 1 dictionary — Ballentine's (1916)
Ballentine's Law Dictionary
James A. Ballentine · 1916
The owner of the soil owns to the lowest depths. See 141 Cal. 116, 99 Am. St. Rep. 35, 64 L. R. A. 236, 70 Pac. 663, 74 Pac. 766.