99 
Clayton. According to Messrs. Bradbury and Atherton, it 
was as follows : — 
Drift Deposits 
Trias (Pebble Beds) 
Permian Marls, containing beds of limestone, one\ 
of which was 1ft. 4in. in thickness, and nodules 
of gypsum. In the lower parts of the marls i- 
and limestones were shells of Schizodus ohscurus, 
Gervillia antiqica, &c 
Feet. 
36 
46 
200 
Conglomerate 3 
Permian Sandstone 752 
Upper Coal Measures, containing 12 beds of] 
Ardwick Limestone, one of which is 5ft. in > 263 
thickness ) 
1300 
The dip of the Permian strata was about 1 in 8, and that of 
the Upper Coal Measures 1 in 3 to the S.S.W. 
The strata found resemble those at Medlock Yale, except 
that the Permian sandstone has increased from 420 to 752 
feet in thickness. I have estimated that rock under Man- 
Chester at 400 feet, but its entire thickness has never to 
my knowledge been proved. In Chester Street, Chorlton- 
upon-Medlock, at the sugar works of Messrs. Pryor & Co., 
on the south side of the fault which runs from N.W. to 
S.E. between that place and the late Mr. Green’s dye works, 
in Brook Street, the Permian marls and conglomerate bed 
increased to 260 feet in thickness, were found resting on 
upper coal measures containing the Spirorhis limestone 
similar to that at Ardwick without any trace of the Permian 
sandstone. Similar results have been found at the borings 
and sinking of the Seedley print works and the Patricroft 
colliery, and very lately Dr. Perrin informed me that the 
same occurred in a sinking at Plank Lane Colliery, near 
Leigh. 
All the facts hitherto observed appear to show that the 
Permian sandstone is found of great thickness under the 
