View from the south end of the Stiper Stones by the Rev. J. Parker of Siveeny. 



CHAPTER XXII. 

 LOWER SILURIAN AND TRAP ROCKS {resumed). 



Lower Silurian Rocks alternating with Volcanic Grits (Shelve &c). — Amorphous 

 or Intrusive Trap (Cornckm, &c.). — Altered Rocks and Veins of Lead. 

 — Quartz rock of the Stiper Stones. (PI. 32. figs. 1, 2 and 3.) 



The lofty and rugged tract around the village of Shelve, including the adjacent parts 

 of Salop and Montgomery, is of high interest to the geologist, as it offers the clearest 

 evidences of having been the scene of long-continued igneous action, renewed at distinct 

 and successive periods ; whilst the position of the valuable metalliferous veins with which 

 it abounds, affords strong reasons for believing that they are due to causes connected 

 with the intrusion of volcanic rocks. 



The chief mountain, the Corndon (1550 feet above the sea), occupies the central 

 ridge, which extends to the Grimmer rocks near Minsterley on the N.N.E., and to 

 Symmond's Castle, a projection from Todlethir or Taudley Hill, on the S.S.W. This 

 central mass, consisting for the most part of trap rock of intrusive character, is about 



