530 Canadian Record of Science. 



The most interesting fold of the series occurs just east 

 of the end of the concession road, a short distance west of 

 the first point on the hiks shore west of Lome Park. 

 There are here two bands of sandstone interbedded with 

 the shales, the lower one about four and a half inches 

 in thickness and the upper about two inches. When 

 the writer first noticed the anticlines, two years ago, the 

 beds were folded so that the section appeared as shown 

 in the figure (Figure 1). The upper portion of the 



H 10 Tt 



Figure 1. — Horizontal and vertical scales equal. 



beds was somewhat obscured by mud which had trickled 

 down with rain water from above, and the condition of 

 the shales above the upper hard band was uncertain. 

 On visiting the locality this spring it was found that 

 the lake had cut back a short distance, exactly how far 

 could not be ascertained, and the fold now presents the 

 appearance shown in Plate IV. The lower heavy hard 

 band has been fractured at the arch of the anticline 

 and has been thrust forward into the softer shales. As 

 now exposed the disturbance is confined to the beds in 

 the immediate vicinity of this competent member ; the 

 overlying beds to the surface (about six feet) show no 

 signs of disturbance. 



A search for similar folds along the low sections ex- 

 posed in a few small creeks in the vicinity failed to reveal 

 their occurrence. Whether the similar folds occur in the 

 Medina shales and sandstones west of Oakville is also un- 

 certain. There are large sections of cliff which cannot be 

 studied in detail unless we approach the front in a boat or 

 canoe. The writer did not note any while traversing the 

 section between Oakville and Hamilton on foot. 



G. K. Gilbert has described some similar " small |iost- 



