296 H. E. Gregory — The Rodadero (Cuzco, Peru), — 



detail suggest late Pleistocene glaciation, and it is difficult to 

 conceive that limestone and sandstone ledges could have failed 

 to record the effects of long-continued action of an ice mass of 

 the proportions required for the work at the Rodadero. (3) No 

 graving tools in the shape of polished or striated bowlders and 



Fig. 7. 



Fig. 

 tions. 



7. A portion of the Kodadero, showing striae trending in two direc- 

 View looking west. 



no erratics were found on the surface nor in the gravels adjoin- 

 ing. (4) While the general trend of the grooves is S. 30° W., 

 other directions were noted, and at one locality deep grooves 

 running S. 30° W. are succeeded, after a break of a few feet, by 

 equally well-marked striations running S. 60° E. (fig. T). (5) 

 The lee side and stoss sides of the entire mass and of individual 



