MANCHESTER GEOLOGICAL SOCIETY. 
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of this deposit ; but its greatest accumulation is at the foot of 
the sides of the Pennine chain^ and other elevated portions of the 
lower coal field. It occurs near Preston, with few interruptions, 
continues to Haigh, and from the latter place it probably extends 
west of Bolton to Clifton. At this point, one part of it conti- 
nues along the south-west side of the Irwell, past Bury Lane to 
Pendleton, while another portion of it occupies the west side of 
the same valley under Prestwich, Kersal, and Broughton ; thence 
through Harpurhey, Newton, Failsworth, and Droylsden, to Ash- 
ton. The tract of country comprising Stand, Pilkington, the 
Heatons, Alkrington, Middleton, Hop wood. Hey wood, Koch- 
dale, Eoyton, Chadderlon to Hollinwood, is for the most part on 
this deposit. Prom Ashton it continues through Audenshaw, 
Gorton, Reddish, and Stockport, to Hazel Grove on one side; 
while the other runs through Denton, Hyde, Hattersley, Hough- 
ton, Dan Bank, Marple to Hazel Grove, and thence into the Che- 
shire plains, where I leave it for my friend Mr. Ormerod, who is 
much better acquainted with the country, to follow. The high- 
est parts on which I have observed it are above Royton, at Boc- 
cress, near Stalybridge, and at Hattersley. It also occurs in many 
elevated points in Cheshire. The dip of it is often considerable. 
As to its organic remains, marine shells have been found in it 
at Preston, by Mr. Gilbertson. I have met with the Turritella 
terehra, Cardium eduhj and a portion of another bivalve, below 
Haigh Hall, in a gravel pit shown me by Mr. William Peace. 
The same shells have been discovered on the line of the Bolton 
and Preston Railway, below Blackrod Church. According to 
Mr. F. Looney, F.G.S. the gravel and sand at Ashton-under- 
Lyne afi'ords them. I have found plenty of them in the gravel 
pits at Bowdon ; and Sir Philip Egerton, Bart, and Mr. George 
Wareing Ormerod, have found them in other parts of Cheshire ; 
the former near Tarporley and the latter at a place east of the 
Dane Viaduct. Some geologists assert that they have found 
corals in it ; but these are not such as have lived in the waters 
