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PROCEEDINGS OP THE GEOLOGICAL SOCIETY. [Apr. 16, 



in thickness, at No. 11 sixty feet, and at No. 12 thirty feet. It 

 is therefore evident that a basin in the limestone was crossed by the 

 line of the work. 



Probably these clays have a considerable extension to the N.E. 

 and S.W. ; for thin beds of the same deposits were met with in g, 

 trial- shaft sunk by the Lindale Cote Company at the highest part 

 of the table-land, one- third of a mile S.W. of No. 11 shaft, and at 

 the same level. Here, as in the first-proved locality, the clays 

 yielded vegetable remains and Diatomacece. The accompanying 

 section is that of the shaft in question : — 



Fig. 2. — Section of a Shaft at the Lindale Cote Mines, near Ulverston. 



a. Surface-soil (and Roadway) ; 1 foot. 



b. Hard reddish rubble (' Pinel ") ; 68 feet. 



c. Grravel ; 8 feet, 



d. Yellowish sandy material ; 16 feet. 



e. G-reenish clays, with plant-remains ; 3 feet. 



/. Clay, coloured blue in patches by phosphate of iron, and with woody 



fragments similarly coloured ; 2 feet. 

 g. Sand ; 6 feet. 



h. Yerj soft sandy limestone, abounding with characteristic Mountain- 

 limestone fossils ; 22 feet. 

 z. The North Drift, with the Iron-ore in the Limestone. 



The eight feet of gravel alluded to in this section is of the ordinary 

 alluvial character, made up of water-rolled pebbles of Upper and 

 Lower Silurian rocks, bedded in quartz -sand. There is elsewhere 

 evidence of this drift- deposit having resulted from north-westerly 

 currents. 



From the lowest part of the soft limestone thus pierced, a hori- 

 zontal drift was driven northward in search of iron-ore; and in 

 progress of the work, it was found that the limestone and the lowest 

 superimposed beds had a steep downward inclination ; also, that the 



