^. - *^ * - - m 



, 



SIsJS: - . :. 



^V "^ " "~-^- <- ^W"! - <K - 



FIG. 7. Eroded exposure of the oldest known glacial deposits (Lower Huronian), 

 near Cobalt, Ontario. Photograph by A. P. Coleman. 



FIG. 8. Striated bowlder taken from the oldest known glacial deposits. 

 Photograph by A. P. Coleman. 



