Theory of Formation of Sedimentary Deposits. 121 



westward of the Niagara escarpment, near Collingwood, 

 the beds, which further east and south overlie the band, 

 are found to rest directly on the red shales and sandstones 

 of the Medina, 1 suggest that this grey band may be an old 

 sand-dune belt subsequently evened off by the Clinton 

 sea — the landward extension of the Medina beds found 



The top of the "Grey Band near Grimsby, Ontario, showing cross- 

 bedding. The hammer is leaning against the lowest member of the 

 Clinton, and rests upon the top of tl e Medina. 



Figtjee 3. 



further west beneath the overlying Clinton and Niagara' 

 In Ontario a very few fossils have been found in the band 

 but whether their position was such as to indicate that 

 the band must have been formed under water is unknown. 

 Modern forms are frequently found in modern sand-dune 



1 The sandstone has not yet been examined microscopically to determine th e 

 character of the grains. 



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