Texas Natural Resources Code - NAT RES § 201.002. Definitions

(1) “Cave” means any naturally occurring subterranean cavity, and includes or is synonymous with cavern, pit, pothole, well, sinkhole, and grotto.

(2) “Gate” means any structure, lock, door, or device located to limit or prohibit access or entry to any cave.

(3) “Speleothem” means a natural mineral formation or deposit occurring in a cave, and includes or is synonymous with stalagmites, stalactites, helictites, anthodites, gypsum flowers, needles, angel's hair, soda straws, draperies, bacon, cave pearls, popcorn (coral), rimstone dams, columns, plettes, flowstone, or other similar crystalline mineral formations commonly composed of calcite, epsomite, gypsum, aragonite, celestite, and other similar minerals and formations.

(4) “Owner” means a person who owns title to land on which a cave is located, including a person who owns title to a leasehold estate in the land.