95 
would probably cause sterility, but six chaldrons per acre may 
be safely used of Knottingley or Womersley lime. 
2. The lied Marl and Gypsum* which is the next subjacent 
bed, occupies generally a position atthe base of the escarp- 
ment formed by it and the upper thin-bedded limestone ; it 
however in some places extends considerably to the west, and 
then runs in a thin layer upon the inferior yellow limestone. 
All farmers of these limestone soils ought to be acquainted 
with the range and extent of this bed, not only because it 
contains a most valuable manure, gypsum, but as requiring 
a peculiar mode of draining and crops, differing from those 
grown on the limestone. The places at which it extends to 
the west of the escarpment formed by it and the upper bed 
of limestone, are Grove Hall, where it forms the soil of the 
park ; again at Stapleton Park, where it extends full one 
mile to the west of its accompanying limestone ; again in the 
valley of the Went a great surface is exposed ; (but the 
excellent grass lands adjoining this river from Wentbridge to 
Fishlake are of alluvial origin :) again near Askern there is a 
great extent of red marl and gypsum exposed by an enormous 
fault traversing the country in a line from Barnsdale by 
Camps Mount and Campsall Lake, which elevates the lime- 
stone on Askerne Mount. From Campsall to Sandbeck Park 
there is no extension of this bed beyond the base of the 
declivity described, but at the latter place it ranges into each 
side of the Park, and particularly on the north side forms the 
soil of a considerable tract of wet land. The mode of culti- 
vating this soil will be spoken of in the sequel. This bed 
finally terminates to the south near Letwell, where it becomes 
of great thickness and the upper thin-bedded limestone dis- 
appears also from the formation. An enormous fault between 
Loversall and Wadworth divides the whole bed, and hence 
• See Map and Vertical Section. 
