110 



vered northern limit of tlie S lurian fish-bed, the exact position of 

 which was pointed out, and fragments of it collected. Our sec- 

 tion proceeding now in a descending order, again we passed the 

 upper limestone on the ridge of the Ludlow promontory, here form- 

 ing the northern side of the Wigmore valley of elevation, over the 

 obscured escarpment to the thinned-out strata of the Wenlock 

 (= Dudley and Ledbury) limestone, to the productive organic 

 shales (known as Wenlock Shales) at Burrington. The valley of 

 Wigmore, though not so regular and perfect as that of Woolhope 

 now so well known, deserves a more extensive examination than 

 we were enabled to give it. Its physical features are very striking. 

 The escarpment and slopes from the fault at the Bow bridge over 

 the Teme, along Bringewood Chase to Mary Knoll, Whitcliffe and 

 Ludlow; thence by Ludford to Richard's Castle, thcfligh Winnals 

 and Gatley, and the exterior diverging escarpment from Orleton 

 Common to Croft Ambrey and Aymestry, with the numerous 

 transverse valleys by which they are cut into and through, espe- 

 cially Mary Knoll Dingle, the Hay Park, Croft Castle Dingle and 

 Aymestry Valley, afford most instructive sections, in many places 

 abounding with fossils. The broken-up strata of the lower 

 escarpment, forming the picturesque knolls from Aston Common 

 to Elton and Leinthall Starkes, cannot fail to attract attention; 

 whilst the road from the finger-post at Elton, to Richard's 

 Castle and Orleton presents excellent sections of the Wenlock 

 Shales and limestone, the lower Ludlow beds, Aymestry lime- 

 stone, and upper Ludlow with the Downton beds — id tact, the 

 greater part of the upper Silurian — into the old red sandstone. 

 The valley of Wigmore abounds with the detritus of the sur- 

 rounding rocks, which is also found swept out over portions of 

 the old red sandstone between Ludlow and Leominster. The absence 

 of gravel within the valley of Woolhope has been remarked by Sir 

 Roderick Murchison. 



separated several feet, was observed hy the late Messrs. Scobie and Strickland, 

 at Hagley. Small spines Iiad been previously noticed in corresponding beds 

 at the Tin Mill Coppice, near BringAvood. Traces of the iish bed have now been 

 satisfactorily observed near Kington, Lucton, Kichard's Castle, Ludford, 

 Downton Castle Bridge, round the Ludlow promontoiy ; at Hagley and Gamage 

 Ford, round Woolhope ; and at Longhope, Blaisdon Edge cutting and Flaxley, 

 in the prolongation of the upheaval towards the Severn. I have found frag- 

 ments of it in the gravel between Leintwardine and Clungun/ord. 



