BULL. GEOL. SOC. AM. 



VOL. 10, 1898, PL. 2 



Fi(iLT!E 1 — Tourmaline Schist 

 Fruiii sfcon.l l(,.-ali<y, B.-lelier Hill. ( ■,,!,, ra.l.. 



FliifUE -1 — 'i'nnt.MAJ.lNE .•"il lllsi' 



From Sffonil locality, Helcher Hill, Colorado 



TOURMALINE SCHISTS 



