1962—Pub. L. 87–713 defined “petrified wood”, and provided that no deposit of petrified wood shall be deemed a valuable mineral deposit within the mining laws of the United States.
Regulations for Removal of Limited Quantities of Petrified Wood
Pub. L. 87–713, § 2, Sept. 28, 1962, 76 Stat. 652, provided that: “The Secretary of the Interior shall provide by regulation that limited quantities of petrified wood may be removed without charge from those public lands which he shall specify.”