21 



and "pillow structure" in sandstone, with contempor- 

 aneous erosion of the underlying beds, are to be seen at 

 different horizons in the exposures. 



"Pillow" sandstone with contemporaneous erosion in Lorraine beds, Streetsville, 

 Ontario. 



BIBLIOGRAPHY. 



1. Logan, Sir W E Geol. Sur. Can., Rep. 1863, pp. 



198-224. 



2. Nicholson, H. A Rep. Pal. Prov. Ontario, pp. 21-38, 



1874. 

 See also the literature cited for the Manitoulin islands, 

 Excursion C-5. 



