^2 The Ottawa Naturalist. [August 



I ^2 



siliceous and pass upwards into very fine grained and rather 

 thick bedded soft mudstones or shales with peculiar concre- 

 tinary structure and conchoidal fracture. 



The outcrop of this formation along Deschencs Lake Shore 

 affords just sufficient material to enable the geologist to identify 

 the horizon there represented in the stratigraphical column of 

 formations. The occurrence of the gasteropod : Plenrotomaria 

 gregaria, Billings, a form characteristic of the Calciferous sand- 

 rock of Ste. Anne and St. Eustache in the Eastern extremity o^ 

 the Ottawa Palaeozoic Basin where it forms part and parcel of 

 the present (same geologicall}) St. Lawrence Basin, affords 

 sufficient evidence to enable the reference to be made with a 

 degree of accuracy. 



Then the newer or Pleistocene deposits are very poorly 

 represented in the Park, but in the Island south of the Park, on 

 which the Lighthouse is built, are sands and gravels of post-glacial 

 origin and made up for most part of debris of Palaeozoic and 

 Archaean rocks. The geological party v/as led by Mr. T. W. E. 

 Sowter, who proved a very valuable leader and also b)- the 

 President. 



Arch.EOLOGV. — Mr. Sowter informed the members present 

 that the shore of the lake in the vicinity of the Park, especially 

 along the line of the terminus of the Electric Railway line, was a 

 favourite resort of the aborigineesof this country and the site of 

 an old camping ground. 



One of the members of the geological section visited the 

 Lighthouse Island opposite the Queen's Park and obtained a 

 number of bones of the former inhabitants of this district, who 

 had been interred in this sequestered spot. Some of the bones 

 were found strewn along the northern and eastern shores, 

 bleached and partly submerged, others were found in the gravels 

 on the bluff or west side of the Island. 



This district is well worth visiting and studying from an 

 Archttiological or Ethnological standpoint, and from the success 

 which has already attended the researches of Mr. T. W. PL. Sowter 

 the club hopes to be able to chronicle very interesting result 

 before long. PI. M. A. 



