Title 30 › Chapter CHAPTER 15— - SURFACE RESOURCES › Subchapter SUBCHAPTER II— - MINING LOCATIONS › § 611
Prevents people from making a valid federal mining claim based only on common sand, stone, gravel, pumice, pumicite, cinders, or petrified wood. If a different valuable mineral is found in or with those materials, a claim based on that other mineral is still okay. “Common varieties” does not mean a deposit that is valuable because of a special property, and it excludes “block pumice” (natural pieces with any one dimension 2 inches or more). “Petrified wood” means wood turned to stone by silica or similar material (for example, agatized, opalized, or silicified wood).
Full Legal Text
Mineral Lands and Mining — Source: USLM XML via OLRC
Legislative History
Reference
Citation
30 U.S.C. § 611
Title 30 — Mineral Lands and Mining
Last Updated
Apr 6, 2026
Release point: 119-73