; (2) in the first sentence— (A) by inserting mineral materials, including after varieties of ; and (B) by striking or cinders and inserting cinders, and clay ; (3) by striking Common varieties as used in this Act does not and inserting the following: (c) Definitions In this Act: (1) Common varieties The term common varieties does not ; (4) by striking Petrified wood as used in this Act means and inserting the following: (2) Petrified wood The term petrified wood means ; and (5) by inserting after subsection (a) the following: (b) Disposal of mineral materials (1) Definition of valid existing rights In this subsection, the term valid existing rights means rights to a mining claim located for any mineral material that— (A) had and still has some property giving mineral material the distinct and special value referred to in this section or, as the case may be, met the definition of block pumice referred to in subsection (c)(1); (B) was properly located and maintained under the general mining laws prior to the date of enactment of this subsection; (C) was supported by a discovery of a valuable mineral deposit within the meaning of the general mining laws as in effect immediately prior to the date of enactment of this subsection