ith exposure, .-iltihidc 1000 feet, upper Billcr Hoot 



Mountains. Op.n t.u.-st of /'///.> i><>n<l>'i-<i. \\\ the bottom of the 

 c;inyin a thick st;uid <>f /'.v/-/i//n/x//,// Mr/'/o/m. Au.iriisl. 



188 



