No deposit of common varieties of sand, stone, gravel, pumice, pumicite, or cinders and no deposit of petrified wood shall be deemed a valuable mineral deposit within the meaning of the mining laws of the United States so as to give effective validity to any mining claim hereafter located under such mining laws: Provided, however, That nothing herein shall affect the validity of any mining location based upon discovery of some other mineral occurring in or in association with such a deposit. “Common varieties” as used in this subchapter and sections 601 and 603 of this title does not include deposits of such materials which are valuable because the deposit has some property giving it distinct and special value and does not include so-called “block pumice” which occurs in nature in pieces having one dimension of two inches or more. “Petrified wood” as used in this subchapter and sections 601 and 603 of this title means agatized, opalized, petrified, or silicified wood, or any material formed by the replacement of wood by silica or other matter.

Terms Used In 30 USC 611

  • association: when used in reference to a corporation, shall be deemed to embrace the words "successors and assigns of such company or association" in like manner as if these last-named words, or words of similar import, were expressed. See 1 USC 5
  • Common varieties: as used in this subchapter and sections 601 and 603 of this title does not include deposits of such materials which are valuable because the deposit has some property giving it distinct and special value and does not include so-called "block pumice" which occurs in nature in pieces having one dimension of two inches or more. See 30 USC 611
  • Discovery: Lawyers' examination, before trial, of facts and documents in possession of the opponents to help the lawyers prepare for trial.
  • Petrified wood: as used in this subchapter and sections 601 and 603 of this title means agatized, opalized, petrified, or silicified wood, or any material formed by the replacement of wood by silica or other matter. See 30 USC 611