340 REV. E. HILL AND PKOF. T. Q. BONNEY ON THE 



"beds at several points near the Monastery, and doubtless those great 

 agglomerates are extremely local and exceptional formations. 



"We showed, in Part I., that the Monastery coarse-ash beds belong 

 to a horizon which can be traced down the whole western side of 

 the anticlinal as far as Benscliff Wood. Distant from them about 

 a mile, measured across the strikes, we meet at several points 

 (Markfield, Ulverscroft mill, &c.) with agglomerates containing 

 slate which can be traced through Bradgate across the anticlinal to 

 the wood of Blores HiU. We have since traced the Markfield beds 

 (Altar-stones) some distance further to the north-west, and have 

 been struck by their strong likeness to some of the beds at Abbot's 

 Oak (Green Hill), which appear to overlie by a very short interval 

 the slate agglomerate on High Towers. We have also discovered 

 an agglomerate identical with the Blores-Hill mass in the grounds 

 north-east of EoecHffe Hall. Its strike points to Woodhouse-Eaves 

 Mill, where, also, are beds with fragments of slate. No equivalents 

 can be identified on the continuation of this strike in the grounds 

 of the (Woodhouse) Hanging Eocks ; but there is probably some 

 slight bending or faulting ; for beyond, at three difierent outcrops in 

 the Out woods, are agglomeratic rocks with large fragments of slate, 

 to all appearance belonging to the same horizon *. 



We have thus traced the horizon of the great slate agglomerates 

 round three fourths of the circumference of the Forest, from Lough- 

 borough Lane in a circuit about to High Towers. As we mentioned 

 above, the coarse-ash beds, whenever found, occur at a distance of 

 about a mile from this horizon. Now the distance from the coarse ash 

 on the Whittle HiUs to the slate agglomerates in the Outwoods is 

 almost exactly a mile. Thus the evidence for the identity of the 

 coarse ash above Whittle Hill with that round the Monastery is as 

 strong as the nature of the case admits. 



It follows that our estimate of the throw of the anticlinal fault (given 

 in Part II.) must be considerably reduced. The horizon of the 

 slate agglomerates, judging by their position at Roecliffe Hall, must 

 also be much nearer that of the grit and pebble beds than we had 

 previously supposed. 



The beds on Longcliif appear by their strikes to underlie those on 

 the Whittle Hills. Yet they have, as we said, no resemblance to 

 the Blackbrook series. Their affinities are rather with those of a 

 much higher horizon. In one or two places fragments of the pinkish 

 felsite were distinctly seen with the eye. Several slides have been 

 examined. Quartz grains are present, similar to those of the 

 Sharpley-Peldar district, and broken felspar crystals also with similar 

 microlithic inclusions t, and numerous lapilli, mostly of the usual 

 rhyolitic type ; epidote is present, with much chlorite, viridite, and the 

 usual fibrous hornblendic mineral. On the whole these Longcliff beds 

 have much in common with the finer portions of the beds of the 

 north-western district already described. There is also among them 



* We may notice, in passing, that the agglomerates of this horizon contain 

 fragments which we took originally to be purple slate, but now recognize to be 

 purple rhyolite. t See p. 343. 



