526 Canadian Record of Science. 



an arenaceous limestone. These bands vary from half an 

 inch to about six inches in thickness. In cross section 

 they are seen to be lenses varying from about twenty feet 

 or less, to over two hundred yards in length. The distance 

 between the hard bands varies from six inches to several 

 feet. As a general rule the wider bands are separated by 

 a greater thickness of softer shales. The average of a 

 number of observations shows the dip of the beds to lie 

 between twenty and twenty-five minutes towards a point 

 about eight degrees west of south. The upper eight feet 

 of the shales is more or less oxidized to a brownish tint. 



These beds constitute the upper portion of the Lorraine 

 shales, the reddish Medina sandstones appearing on the 

 lake shore at a point a little further west, just east of 

 Oakville. 



The beds are capped by a covering of boulder-till vary- 

 ing in depth from a few inches to about three feet. The 

 till carries a few boulders of gneiss and granite and 

 numerous fragments of the harder sandstones. Where 

 the till rests upon the soft shales, it is often difficult 

 to determine the line of demarcation between the two. 



The feature of particular interest in the section is the 

 occurrence of a number of anticlinal folds in the upper 

 beds. The first of these, from the west, is shown in 

 Plate I. It occurs about fifty yards 'east of the road 

 which comes down to the lake shore about two miles west 

 of Lome Park. At this place the cliff' is about twelve 

 feet in height, and the upper nine feet exposed above the 

 shingle beach show the beds to be folded upward in a 

 sharp anticline, the change from the nearly liorizontal to 

 a steep dip being quite abrupt. The fold is about seven 

 feet across. The east side, as shown in the plate, is partly 

 obscured by a recent fall of boulder clay, It is probable 

 that the disturbance does not extend much below lake 

 level. The arch of the anticline has been thrust upward 

 into the boulder clay, so that now the shales at the arch 



