73 



ADDITIONAL NOTES ON THE GEOLOGY AND PAL^:ON- 



TOLOGY OF OTTAWA AND liS ENVIRONS. 



By Henry M. Ami, M.A., D.Sc, F.G.S., &c., &c. 



Introduction. 



The following notes comprise a brief sketch or resume of work 

 done by the writer during the season of 1890 in connection with the 

 Ottawa Field Naturalists' Club. 



From my note book I find that no less than nineteen excursions 

 and sub-excursions were held in various directions around Ottawa. Old 

 Chelsea, Lachute, Casselman, Rockliffe, Moose Creek, Hull, Gloucester 

 and several localities within the city limits, were visited and numerous 

 forms of interest were gathered The variety and quantity of material 

 still to be discovered and described which the various geological terranes 

 about Ottawa can afford are sufficient to satisfy as well as entice the 

 student of Geology for years to come. 



Notes. 



0/d Chelsea. — On the 31st of May, Butternut Grove, Chelsea, was 

 visited by about 125 members of the Club. The geological party, 

 amongst whom were Prof. L. W. Bailey, of the University of New 

 Brunswick, and Mr. H. T. Martin, of Montreal, visited the magnificent 

 outcrops of crystalhne limestone at the ravine, near Old Chelsea, and 

 brought back an interesting suite of specimens illustrating the character 

 of the belt of x\rchcean rocks in that district. Specimens of apatite, 

 asbestus, serpentine, pyroxene, wollastonite, gneiss, diabase, and 

 numerous other rocks were obtained and described by some of the 

 leaders on the spot. 



Lachute. — On the 7th of June, a joint excursion of the Natural 

 History Society of Montreal and ot the O. F. N. C. was held in the 

 picturesquely situated town of Lachute, Que., where the geological 

 section was put in charge of Mr. McOuat, B.A., and the writer. 

 The Laurentian and Calciferous horizons were visited and a number of 

 the characteristic fossils from the latter terrane were oberved in the 

 collections, which, as judge in the awarding of prizes, I had an 

 opportunity of examining. Ophileta compacta., Salter, (6>. complanata., 

 Vanuxem), Pleutotomaria Canadensis, Billings, Miirchisonia . Anna, 

 Billings, and fragments of other forms v/ere noted. 



