140 
In the fourth section, at Ordsal, Messrs. Worrall found 
the trias beds 460 feet in thickness without going through 
them. At the bottom of the bore the water became so salt 
that they discontinued the work, it being no longer fit for 
dyeing and such like purposes. This is the first instance, to 
the Author’s knowledge, where salt water has been met with 
in the trias near Manchester. 
The fifth and sixth sections were at Skillaw Clough and 
Bentley Brook, to the north of the Newburgh station on the 
Manchester and Southport Railway. These were some time 
since discovered by Mr. E. Hull, B.A., F.G.S., of the Geolo- 
gical Survey, and described shortly by that gentleman in the 
sheet explaining the map of the district. Further particulars 
were given of the details of both sections, and an analysis of 
the limestone was produced, which showed it to differ in its 
chemical characters from the thin ribbon bands found in the 
permian marls near Manchester, Patricroft, Astley, and Leigh, 
and was very like the yellow magnesian found at Stank, in 
Furness, North Lancashire. Probably it might prove to be 
a different bed, and more like the great central deposit of 
magnesian limestone of Yorkshire than the thin beds pre- 
viously alluded to. 
