S'iS Mr. Williamson on the Limestones found 



Ft. In. Ft. In. 



Clurich and shaly clay 17 



Limestone, according to Mr. Porter 1 



Shaly clay 15 )>79 6 



Limestone, according to Mr. Porter 1 6 



Coloured clays 45 



Blueclay T. 1 



Black bass 1 



Coal 6 



Blue clay, sometimes changing to red 5 



Limestone, main seam 9 



Coloured shaly clays (about) 60 



Coal 1 3 



Coloured clays, extent unknown. 



On the banks of the Medlock we find the following section 

 exhibited : 



Ft. In. 



Red clays, extent unknown ; one thin seam containing 



Urdonidce. 



Limestone 4 



Red and blue clays 20 



Limestone 3 



Clunch 24 



[Here the section is lost for some feet under the diluvium.] 



Red sandstone and clunch in thin laminae 10 



Hard seam of sandstone 1 3 



Soft red lamellar sandstones 20 



Hard grey sandstone 6 



At this part of the section the weir is fixed, which raising the 

 level of the water, conceals the black bass and main limestone. 

 For a space of 360 feet, the low banks of the river consist en- 

 tirely of alluvial and diluvial matter concealing the strata 

 beneath. When they reappear, we observe the following 

 series : 



Ft. In. 



Coarse gray sandstone 3 



Blue marly clay G 



Black carbonaceous shale 6 



Coloured clay with leaves of Stigmaria 2 



Limestone , 1 



Coloured clays , 16 



Nodular limestone 2 



Red sandy clay 1 8 



Limestone, perhaps lenticular 4 



Red sandy clay 3 



Blue clay 1 



Thin red sandstones 27 



Shales and red sandstones 30 



Red clays — 



Both these sections are local ones, and of course liable to va- 

 riation. The thin limestones I have no doubt will vary much 

 both in thickness and position, and with respect to the clays, 

 they are of little importance. 



