332 MR. J. E. MARTI ON LIMESTONE-KNOLLS IN [Aug. 1899, 



detailed structures, premising that it is the object of this paper to 

 show that the knolls themselves, with their accompanying breccias, 

 are directly due to the lateral pressure which has atfected the 

 district. To a student of the minor structures no section offers 

 more information than that exposed in Draughton Quarry, and 

 I shall now give some account of the features presented therein. 

 The village of Draughton lies 3 miles east of 8kipton. The 

 quarry, which is one of many, may now be readily found, as it is 

 close to the church at present in course of erection. It is irregularly 

 quadrangular, and, as before remarked, the classic section occurs at 



Fig. 1. — General 'view of the eastern end of Draughton Quarry. 



[Reproduced from a photograph by E,. H. Adie, M.A.J 



the eastern end. The north side nearly coincides with a line of faiilt ; 

 at the western end the folding is less complex than at the eastern, 

 while the south side runs parallel with the general strike of the 

 beds. Commencing with the eastern end, it will be seen in the 

 above figure that there are two sharp anticlines with an intervening 

 syncline, and on the left of these are beds dipping northward, which 

 seem to form an overfolded anticline with the core faulted, the 

 syncline that intervenes between this and the anticline on the right 

 being faulted out. I shall speak of the two sharp anticlines as right 

 and left, and of the intervening syncline as the central syncline. The 

 beds consist of limestones of various degrees of purity, with several 

 interbedded shales. Three of these shales are more important than 

 the others, and I shall refer to them as the upper, middle, and lower 

 shale-bands. The upper shale-band is seen above the highest very 



