SUPERFICIAL GEOLOGY OF DUNDAS VALLEY. 131 



The white clay in this neighborhood shows no stones in the sections, 

 although occasional fragments containing Hudson river fossils and 

 small boulders of granite are found on the surface and in the beds of 

 the streams. These granite boulders are for the most part small and 

 rounded. A stream running parallel to this on the other side of the 

 line of terraced clay hills, and cuts occasionally into clumps or 

 knolls ol blue clay. 



On the line of the Hamilton and Dundas Street Railway, near 

 Ainslie's Woods, a stream has cut through the brown clay beds to 

 the blue clay and in some places into it for a few feet. The blue 

 clay seems to have the property of forming ifself into a slaty material 

 on its exposure to the air. 



In this stream near Ainslie's Woods, the water has worn it off 

 into a step-like form, giving to an observer, at a casual glance, the 

 appearance 0." blue slaty beds.* 



On the line of the same road, where it begins to to descend to 

 the level of the marsh, there is exposed in the cutting a section of 

 stratified whitish clay and silt, in very thin beds, none of them 

 exceeding three inches in thickness, the surface soil being about two 

 feet thick, but this is evidently brought about by the breaking up and 

 mixing of several of the beds by cultivation, or the vegetation on the 

 surface. 



Again, after passing through a small corner of the marsh, and 

 near where the road crosses Morden's creek, there is another section 

 of the same kind exposed to view. Throughout the cutting on the 

 H. & D. S. R., on Mr. Buttram's farm, a band of faint brown clay 

 can be detected between the beds of whitish yellow clay. 



On the top of the second escarpment, at Ancaster, this stratifi- 

 cation is altogether wanting. The streams show in their sides, clay 

 mixed with gravel and sand, in no regularity, but in patches. 



A hill on the farm of Mr. R. Guest has already been described 

 as being composed of blue clay enclosing peebles and patches oi 

 fine building sand. These patches of sand tempted Mr. Guest to 

 open a pit, but it proved a failure on account of the uncertain dis- 

 tribution of the sand. On the same farm, a well near the upper 

 ridge passed through 35 feet of sandy loam. 



* The red and blue elays in this stream may, upon closer examination and tracing) prove t 

 be shales of the Medina. 



