Raymond : The Chazy Formation and its Fauna. 593 



1899. Ells, K. W. Report on the Geology of Argenteuil, Ottawa, and a I'art of 



Pontiac, Counties. Geological Survey of Canada, Vol. XII, Report J. 



" The fossiliferous sediments along the lower Ottawa have evidently been 

 deposited in an estuary of the old valley of that river, which must have been 

 well defined at an early date, and shortly after the deposition of the Gren- 

 ville series. The northern limit of the Palreozoic sea is defined by a bold 

 series of hills, which extend along the north side of the Ottawa from Ottawa 

 City to Saint Jerome, situated to the northwest of Montreal, while the south- 

 ern and western limit is roughly indicated by the areas of crystalline rocks, 

 the eastern boundary of which can be followed from Arnprior to the City 

 of Brockville on the St. Lawrence River. 



"These newer formations must, however, at one time have had a much 

 wider extension than we find at the present time, since over a large area of 

 crystalline rocks to the west, scattered outliers of fossiliferous sediments 

 occur, as limestones of Black River and Trenton age, and also of Utica 

 shales, throughout the upper part of the Ofavva basin, reaching an elevation 

 of nearly 800 feet above the present sea level." 



1900. Ami, H. M. On the Geology of the Principal Cities in Eastern Canada. 



Transactions of the Royal Society of Canada, V^ol. 6, Second Series, Sec. 4, 

 p. 125. 



Ottawa. — The Chazy formation is here divisible into three series of strata. 

 The lowest arenaceous shales and sandstones which are often calcareous ; 

 the intermediate, formed of variously colored bands of shale holding phos- 

 phatic nodules ; the upper, formed of marine limestones holding innumer- 

 able quantities of ostracods. The entire formation is not over 200 feet thick. 



Montreal. — The formation consists of light and dark-gray crystalline 

 limestone between 200 and 300 feet thick. 



.Some fossils are listed from both cities. 



1900. Clarke, John M., and Schuchert, Charles. The Nomenclature of the 

 New York Series of Geological Formations. American Geologist, Vol. 

 XXV, pp. 114-119. 



1900. Ells, R. W. The Physical Features and Geology of the Palreozoic Basin, 

 between the Lower Ottawa and St. Lawrence Rivers. Transactions of the 

 Royal Society of Canada, Vol. 6, Second Series, Sec. 4, p. 99. 



This paper gives about the same data in regard to the Chazy as the paper 

 by the same author published in 1896. 



1900. White, Theodore G. The Upper Ordovician Faunas in the Lake Cham- 

 plain Valley. Bulletin of the (jeological Society of America, Vol. lo, pp. 

 452-462. 



This paper treats primarily of the Black River, Trenton, and Utica forma- 

 tions, but the following interesting references are made to the Chazy : 



"The capping bed of the underlying Chazy, where well exposed, seems 

 to be a very constant and characteristic layer of fine-grained sandstone or 

 quartzite. It is particularly well shown at Valcour Island and Crown Point 



