Vol. G].'] SALOPIAN HOCKS OF CAUTLEY AND RAVENSTONEDALE. 229 



(a) The Ludlow Beds of Wandale Hill. 



The summit and the north-western slope of Wandale Hill are 

 formed of Lower Ludlow strata, the outcrop being semi-elliptical ; 

 on the east and south-west the lowest beds pass conformably 

 downwards into the Wenlock Series. On the west, however, they 

 arc faulted against the Browgill lteds, and farther north along the 

 Spengill Road are faulted out. Only the Monograptus-nilssoni Zone 

 is found on Wandale Hill. 



The exposures occur in an old quarry above Narthwaite, just 

 below the Spengill lload ; and in the heads of three gills which 

 cross the same road farther north. 



NarthAvaite Quarry. — The lowest beds crop out imme- 

 diately below the west side of the quarry-wall; they are tough, 

 blue, banded flags, rather coarse and sandy in texture, yielding 

 Monograptus dabius in association with M. colonics. 



Above the wall fossils typical of the M.-nilssonl Zone are 

 abundant. They occur in relief in a band of blue flags, above 

 which sandy and minutely banded blue flags dipping at 36° south- 

 west by south are exposed ; the fossils in these are preserved as 

 impressions only. M. colonus, M. hohemicus, and Cardiola inter- 

 rupta are met with most frequently. 



The higher beds in the quarry are grey-green, slaty, unfossili- 

 ferous flag's. 



Table IV. — Wandale-Hill Ludlow Gu.u'Tolite> 



Species and Ya rieties. 



C = very common, 

 c = common, 

 r = rare. 



Zone of 

 ILoiiorjraptiis nilssoni. 



Narthwaite 

 Quarry. 



Gill 1. 

 Gill 2. 

 Gill 3. 





C 



c 

 c 



c 



c 

 c 



::: c s 



| c 



C C 







Monograptus colon us Barr 







• 



c 

 c 







r 



• 









Monoqraptus wandalensis, sp. nov 



Itetiolites tiassa Holm 



... 







Spengill Itoad Gills. — The Ludlow strata in these three 

 gills are sandy, banded flags of a higher horizon than those exposed 

 in Narthwaite Quarry ; when weathered the rocks assume an 



