184 NINTH REPORT. 



county, to which my attention was directed by Mr. K. J. Sundstrom, General 

 Manager of the quarry, are of a later horizon than the thin-bedded strata in 

 Anderdon and on Pelee Island. It would appear that the depositing of the 

 same limestone beds has gone on for a long i^eriod in the Corniferous age, 

 in Wayne county, after it had ceased in Essex county by reason of the eleva- 

 tion of the Devonian sea bottom. There is evidence of disturbing forces at 

 work producing this uplift presented: (1) in the faulted and disturbed con- 

 dition of the Lake Erie islands; (2) in the irregularly undulating surface of 

 the Silurian rock in Detroit river bed and in Monroe county; and more par- 

 ticularly (3) in the fact of the absence of the later Corniferous beds on the 

 Canadian side of the river which are present and exposed in the Sibley quarry. 



It wdll not be without interest to note the varying elevation of the Sylvania 

 sandstone which forms a very considerable surface extension in Monroe 

 county. At Amherstburg, in the bed of the river, opposite the D., B. I. & 

 W. Ferry Company's dock on Bois Blanc Island, it forms a surface extension 

 over a very small area, at an elevation of 552.5 feet. At the Sucker Creek 

 Gas and Oil Company's test well in Anderdon Township it occurs at the ele- 

 vation of 199 feet. At the Salt Shaft below Detroit the elevation is 155 feet. 

 At Belle River, about half way along the south side of Lake 8t. Clair, one 

 record shows a sand rock at an elevation of 312 feet. Almost due south of 

 this on Pelee Island, in Lake Erie, the elevation is, approximately, 300 feet 

 to 325 feet. 



In five wells put down by the Solvay Process Company, below Detroit, the 

 *Sylvania Sandstone runs from SO feet to 103 feet in thickness. Contrasted 

 with this there is 84 feet of it in the f Parks Well in Maiden Township, some 

 two miles distant from the outcrop in the river bed between Bois Blanc 

 Island and Amherstburg.f The Caldwell grove well a mile north from this 

 shows 60 feet. In the {Anderdon well already referred to there is 30 feet. 

 At Belle River, 25 feet. And|| on Pelee Island, 40 feet. 



■ The Depth of Till over the western half of Essex county varies from 60 

 feet to 110 feet. Mr. Coste, whose name was mentioned in connection with 

 the Genesee shales, says: "The depth of the drift over the east half of Essex 

 and the west half of Kent seems to vary from 90 to 200 feet, being mostly 

 from 100 to 150. Its character varies a great deal but it most often con- 

 sists of about 100 feet of boulder clay, and from 20 to 30 feet of sand or gravel 

 under that." At Both^vell, at the northeast corner of Kent county, where 

 the surface §elevation is 691 feet, there is a maximum depth of till, 255 feet. 



The Point of Highest Elevation in Essex county is at Ruthven, on the old 

 Talbot road, west of Leamington. Here there is a deposit of sand and gravel 

 and boulders, of the Belmore Beach doubtless, with an elevation of 734 feet, 

 the western limit of a ridge of the same material that extends parallel with 

 Lake Erie almost its entire length, and which reaches a maximum elevation, 

 for the two counties, of 736 feet near the southeast corner of Kent. 



St. Andrew's Manse, Amherstburg, Ontario, March 8, 1907. 



* My Report on the Corniferous Exposure in Anderdon, Bureau of Mines, Ontario, 1902, 

 page 123. 



t Brummell's report on Natural Gas and Petroleum in Ontario, 1892, Geological Survey 

 of Canada. 



I Log of Sucker Creek Gas and Oil Company's well, Chas. W. Miller, drill contractor, 1905. 



II Drillings examined by Dr. H. M. Ami, Ottawa, 1896. 



§ Surface elevations quoted are as given in the Dictionary of Altitudes in Canada, by 

 James White, F. R. G. S., Geographer to the Dominion Government Geological Survey. 

 The rock elevations are from individual well records, except in the casj of the Amherst- 

 burg Quarries and the Detroit River bed. These latter were ascertained by Mr. Charles 

 Y. Dixon, of the U. S. War Department Office, Detroit. 



