488 J. W. Jackson and J. K. CharlesivortJi — ' 



Mr. Howe also noted the occurrence of large blocks of sandstone 

 lying in the pit, which he was inclined at the time to regard as the 

 remains of an outlying extension of the Bunter or Keuper beds.^ 

 Many of these blocks, some containing pebbles, are still to be seen 

 here. Traces of other deposits of sand and pebbles are still visible 

 in this neighbourhood, especially to the S. and S.E. of Milk Hill, 

 near Waterhouses. 



The presence of black shale in these pits is not peculiar to the 

 Staffordshire series, as we have noted its occurrence in the Longcliff 

 Pit, and in one near Parsley Hay, Derbyshire. In both cases the 

 shale was well-bedded and in a vertical position, as if it had dropped 

 in bodily. In the latter locality the shale contained Posidoniella 

 and obscure plant remains. 



That the whole series of these pits, both in Derbyshire and in 

 Staffordshire, is pre-Glacial in age is clearly proved by the presence 

 of Glacial Drift overlying them. During our survey of the pits 

 recently we made a careful examination of the overburden in every 

 case, and found that it was sharjDly marked off from the underlying 

 sands and gravels, especially in the Derbyshire series. At one of the 

 pits at Parsley Hay we obtained a large boulder of Eskdale granite 

 and two of Borrowdale ash from the overburden, thus proving it 

 to be Drift of the Irish Sea ice-sheet. At the Washmere Pit, near 

 Newhaven, the same Drift contained ice-scratched boulders of 

 dolerite. Carboniferous Limestone, and sandstone. The Drift over- 

 lying the disused pit at Minning Low yielded chert, Magnesian 

 Limestone, dolerites, grits, etc. A dolerite boulder was also found 

 in the Drift at the Longcliff Pit, while from the Drift at the working 

 pit at Ribden we obtained a large ice-scratched boulder of gritstone. 

 The presence of Boulder-clay here has long been known, and was 

 described by G. Maw in 1867.^ 



The Quartzose Conglomerate. — In the earlier paper ^ it was pointed 

 out that the condition of the section exposed in September, 1918, 

 rendered the relation of the conglomerate to the massive Caldon Low 

 limestones [Humerosus beds) somewhat doubtful, but the available 

 evidence suggested an unconformity or a fault. Recent quarrying 

 has revealed a slickensided surface running W.S.W.-E.N.E. along 

 the truncated ends of the horizontal Humerosus beds, thus suggesting 

 movement of the quartzose conglomerate and associated beds in 

 a more or less horizontal direction.'' Blocks of the conglomerate 

 also show the same slickensided surface. It is clear from this fact 

 that the conglomerate does not occujDy its original position. 



1 Ibid., p. 149. 



2 Geol. Mag., Vol. IV, 1867, p. 250, Fig. 7. 

 » Ibid., Vol. LVI, 1919, p. 60. 



* This fault is probably the continuation of the mineral vein marked on the 

 1 in. Geological Map, No. 72, N.E. The vein is now destroyed by quarrying 

 operations. 



