118 E. W. ELLS ON THE GEOLOGY OF 



erate with quartzose sandstoue are seen, but nothiug which may be classed as Levis 

 either in character of sediments or contained fossils has been observed in this direction. 



Between Métis and Point Levis the back country is much more easily accessible than 

 is the district farther east. Numerous settlements exist and rock outcrops are frequent. 

 South of River du Loup a good section is afforded along the road to Lake Temiscouata, 

 on which for over forty miles the rocks of the Sillery division of the Quebec group are 

 well seen ; the most southerly beds, close to their contact with the Silurian showing 

 Obolella prefiosa which was collected by Bailey in 1890, though at the height of land 

 about midway, certain strata which elsewhere in the Eastern Townships we have 

 regarded as constituting the lowest division of the Cambrian are exposed. No strata of 

 the fossiliferous Levis occur in this direction, and this remark applies to the whole 

 extent of country westward to the Chaudière River with the exception of the typical areas 

 of Levis shales, limestone and conglomerate seen at St. Joseph de Levis, the city of Levis, 

 and the southwest end of the Island of Orleans. 



To the south of the Chaudière in the direction of the Vermont boundary, the Sillery 

 red shale and sandstoue series can be continually followed for many miles — occasionally 

 bands of Sillery conglomerate occur, and at one place on the south side of the Chaudière, 

 above the village of St. Lambert, a narrow basin of fossiliferous rock contains fossils of 

 Levis types. It may be here remarked that this is the only outlier of the newer division 

 anywhere observed in this portion of the province. The red Sillery rocks terminate in 

 the township of Farnham at the line of the railway from Farnham to Cowansville, 

 seventeen miles north of the southern boundary of the province, where in certain red beds 

 on the east branch of the Yamaska River, Mr. T. C. Weston some years ago found certain 

 markings resembling Oldhamia.' The red beds are here unconformably overlapped by 

 the limestone of the Trenton formation. Directl^ in the strike of the Farnham-Sillery 

 outcrop, but separated from it by an interval of fourteen miles of Chazy and Trenton 

 strata, the Cambrian belt of St. Armand Corner already described, the extension of 

 the Georgia red sandrock comes in and can be followed into the State of Vermont. 



In the Geological Survey of Canada, 1863, page 228, a section of a portion of the 

 Quebec group, seen on the south side of the Island of Orleans, is given. These were 

 supposed at that date to represent the Levis division only, and their thickness as there 

 displayed was 5,025 feet, all of which was regarded as underlying the Sillery forma- 

 tion. Subsequently a portion of this embracing the green glaucouite shales, the hard 

 sandstones and associated conglomerates, with the red and green shales which occupy a 

 large portion of the south shore of the island, the whole estimated at 3,740 feet in thick- 

 ness, was separated under the title of Lauzon. The remaining portion of 1,283 feet 

 which embraced principally the graptolitic shales, associated dolomites and conglomer- 

 ates, was left to represent the Levis formation. Subsequently the Lauzon division was 

 added to the Sillery. 



In 1888 a section was made by the writer on the north side of the St. Lawrence from 

 the great fault above Cape Rouge to the fault below Sillery or Poiut-à-Pizeau, embracing 

 the typical Sillery and the underlying series of beds which was thence continued across 

 the river to include the strata of Point Levis. This was published in the annual report of 

 that year, and for the purpose of rendering the new views of structure more easily 

 understood may be here repeated ; the section is an ascending one throughout.- 



' Lapwortli, 1886, 'Trans. Roy. Soc. Can.' p. 180. ' Annual Keport Geo. Sur., Ells, 1888, p. 63 k. 



