1902] Annual Report — Geological Section. 255 



Club and their friends have also done excellent work. Georee 

 Lewis Burland, Herbert Maing-y, Dougflas McLean, Percy Wilson, 

 Willie Herridge and Otis Whelen all deserve special mention for 

 the industry and care they exhibited in the collections made and 

 the anxiety they evinced to have them named and labelled. An 

 enthusiastic class of youthful geologists was composed of the boy 

 pupils of our fellow member Dr. Cephas Guillet. The work done 

 by this class is most creditable indeed. 



Besides collections of the fossils which were obtained on 

 several of these sub-excursions, at some of which the president and 

 other officers of the Club and leaders in Geology were present, 

 notes bearing upon the stratigraphy and character of the rock 

 formation were taken and a number of interesting photographs 

 prepared which serve to show the nature of the strata at many 

 points where they had never previously been observed. Some of 

 the photographs taken during the sub-excursions of the Club are 

 used in illustrating points of interest in the geology of Ottawa and 

 its surroundings in Dr. EUs's forthcoming Report of the Geology 

 of the Ottawa District. 



Among the more salient and important features noted may be 

 mentioned the occurrence along the eastern extension of Somerset 

 street, in the centre of that valley of erosion which formerly was 

 used as a rifle range — the Rideau rifle range — a well-defined fault 

 or dislocation in the earth's crust. This is only one of many 

 faults which must exist hidden by pleistocene or drift deposits, and 

 except for the artificial cuttings made and the notes taken during 

 the excavations it would have been practically impossible to say 

 that there existed one there. 



This fault occurs in the Utica formation and presents the two 

 limbs of a normal dislocation, in juxtaposition, the strata being 

 scarcely disturbed at all, yet, both from the studies that have been 

 previously made of the characters of the Utica of the Ottawa district 

 and from the characters of the fauna obtained by the writer on 

 each side of the fault it is evident that the lower as well as the 

 upper beds of the Utica occur in the exposure. 



There was no topographic feature or indication on the surface 

 of the ground or trace whatever evident to even suspect the exist- 



