OF SOUTH LANCASHIRE. 429 
the Bradford collieries: coal is afterwards found 
above Bank-bridge, on the river Medlock, in 
the same vicinity; and the carboniferous rocks 
are then continued without interruption, to the 
gritstone hills on the Eastern boundary of the 
district, beyond Ashton and Oldham. 
At Ardwick, on the Eastern side of Man- 
chester, and very near to the town, several beds 
of limestone are found,* interstratified with beds 
of carboniferous shale: the inclination of the Ard- 
wick limestone is conformable to that of the 
carboniferous strata, and tends towards the South 
West. 
Nine miles to the West of Manchester, at 
Bedford, near Leigh, strata of Magnesian lime- 
stone occur, which are not conformable to the 
carboniferous strata in that neighbourhood. 
From observations madeat Bedford, near Leigh, 
by the late Dr. Phillips, of Manchester, and commu- 
nicated by that able inquirer to the author of this 
paper, it appears, that the strata of the Magnesian 
limestone at Bedford tend to the South-East, and 
* All beds of limestone are coloured blue, inthe accom- 
panying Map of the Coal District. 
