134 The Ottawa Naturalist. [August 



The lower piateau between the hill and the river shore is 

 occupied for the most part by the Calciferous formation and a 

 series of strata which may be termed a transition series between 

 the Calciferous and Chazy. The magnesian limestones and 

 concretionary argillaceous beds such as were noted at the Queen's 

 Park, Aylmer, crop out at this locality and are superimposed 

 by sandy shales and marls which compose " the hill " south of 

 Cumberland village. On the top of the hill and brow thereof, 

 bands of a limestone full of the characteristic RhyncJwnella 

 {Camarotcechid) plena were seen from which excellent specimens 

 were obtained. Above this a few characteristic fossils of the 

 Black river and Trenton formations were also noted. Above all 

 of the.se and along the cultivated flats and farm lands occur the 

 fossiliferous cla\'s and marls of Pleistocene age. Thousands of 

 shells of Saxicava rugoso occur together imbedded in a sand>- 

 clay at the foot and along the slope of the hill on the road to 

 Ottawa on Mr. Gamble's farm. Balariis crcuatus also occurs 

 rarely along with the former named species. 



The limestones of Lower Trenton and Black river age are 

 well exposed along the roadside and exhibit beautiful examples 

 of glacial stria3. The majority of the markings, trend for the most 

 part due north and south, but at times are very irregular in direc- 

 tion which fact indicates the oscillatory movements and shifting 

 of the direction of the great ice sheet carrying boulders of Ar- 

 chaean age, many of which can be seen on the upper ledges of 

 the Ordovcian strata as the}- were deposited or left by the ice as 

 it melted at the close of the glacial period. H. M. .\. 



NOTE. 



Good Gp:ological Section.s. — The Leaders of the geolo- 

 gical section desire to draw the attention of members of the Club 

 to the numerous excavations going on in the City for the Main 

 Drain. These excavations afford excellent sections, and as in 

 the case of earlier public works of the same nature when value- 

 able notes were taken, it is hoped that records will be kept to 

 show the character of the strata traversed in \arious portions 

 of the City and afi'ord material wherewith to la\- down the 

 boundaries of the various geological formations traversed ^with 

 greater accuracy. H. M. A. 



