7G 



localities visited, Montebello and Kirk's Ferry, on the North shore of 

 the Ottawa, were visiied, and interesting collections and notes taken at 

 both places. 



Montebello. — -At Montebello on the 19th Jul}', and through the 

 kindness of Mr. L. J. Papineau, who placed his yacht and services at 

 the disposal of the Geological Branch, an interesting exposure of the 

 Potsdam terrane, showing rippled-marks in abundance, besides the 

 tracks and trahs of marine animals {Protkiimtts septemnotatus, Owen), 

 was visited on the Presqu'ile north of Squirrel Island. This exposure 

 of the Potsdam presents a bold bluff of from ten to twenty-five feet 

 front in height, above low-water mark at this time uf the year, facing 

 the north or Laurentide Hiils, clearly indicating the existence of an 

 open and free chinnel from east to west in Pre-glacial times. The 

 sandstones were beautifully glaciated in several places, and showed that 

 the march of the old glaciers was at right angles to the present flow 

 of the Ottawa, and in a north and south direction, down from the 

 adjoining slope to the north. 



Kirk's Ferry. — At Kirk's Ferry, up the Gatineau River eleven 

 miles, a most successful excursion was held, and the magnificent rock 

 cuts along the G.uintau Valley Railway afforded excellent opportunity 

 of examining the relations of Archaean rocks of various kinds, in close 

 contact and at times fused one into the other. Crystalline limestones, 

 graphite, ophite, calcite, diorites and pyroxenites, as well as apatite 

 and mica, were collected. This region and cutting is well worthy of 

 close attention on the part of the petrographical geologist. 



Radiolarians. 



In May, 1890, I prepared a number of specimens of rock, from the 

 Shales of the Utica, in Gloucester, from the limestones of the Trenton, 

 Ottawa, and also from the calcareo-arenaceous shales of the Chazy of 

 Nepean, for Mr. Tyrrell, who was sending away to Dr. Rust, in Ger- 

 many, specimens of radiolarian rocks from Manitoba and the North- 

 West. Mr. Tyrrell has since heard that the Ottawa specimens have 

 been examined, but no radiolarians were found therein. 



Although this note is negative, still it shows that probably these 

 low organisms in the economy of nature were absent in the Ordovician 

 seas of the Ottawa Palaeozoic Basin. 



