Plate I 



A. Basal Potsdam conglomerate resembling a tillyte, at Mr Dillabaugh's 

 (locality 85), south of Pierrepont 



The main ledge lies just behind, in the trees. (Looking north by east) 

 See pages 15 and 43. 



B. Potsdam boulder in rear of Mr Dillabaugh's 



One of a large cluster derived from the ledge of the preceding view, which 

 lies to the left (across the road) in the trees, at the foot of the Precambrian 

 clifif. 

 The knoll on which the house stands is Grenville limestone. (Looking south- 

 east) 

 See pages 15 and 50. 



