350 THE PEECAEBONIPEEOirS EOCKS OP CHAENWOOB POEEST. 



Tised as the base of a subdivision. Above this, in the north-west, 

 appear to come the Sharpley and Peldar rocks, with the agglomerates 

 of Cadman (and their equivalents in Bardon Hill), which are pro- 

 bably succeeded by the finer beds of the quarry near Whitwick 

 School House. Some portion of this upper subdivision may be repre- 

 sented by the Forest- Gate beds in the north-east ; and the upper 

 limit of the group further south seems to be marked by the pebble- 

 beds and quartz grits of the (Woodhouse) Hanging Eocks, the 

 Brande, the Stable Quarry (Bradgate), and Steward's-Hay Spring, 

 The highest zone, visible only in the more southern part of the 

 Porest, contains the less-banded workable slates of Swithland and 

 Groby. 



The beds are elevated in an elongated dome-shaped anticlinal, of 

 which only one half is visible, and the vertex points to the south- 

 east ; so thab denudation has exposed the lowest beds at the northern 

 end, and the others lap round them in rudely elliptical zones. These 

 are interrupted by the anticlinal fault or faults, and, at the north- 

 western corner, by many fractures, which greatly perplex the- 

 investigator. 



Much yet remains to be done in the Porest region ; but we are not 

 hopeful that more of importance will be accomplished (unless new 

 quarries are opened) without constant and minute reexamination of 

 the ground, such as is impossible for any but residents in the vicinity^ 

 We therefore now take our leave of Charnwood Porest, in the 

 hope that some of the local geologists will continue our task. "We- 

 are well aware that some at least of our conclusions are founded on 

 imperfect evidence, and we cannot hope to have avoided error ; but 

 we may fairly claim to have bestowed upon our work considerable 

 time and pains. We venture therefore to deprecate hasty criticism,, 

 and trust that our mistakes may be judged leniently. 



Discussion. 



Dr. SoKBT said that, in preparing his Address, he had found great 

 difficulty in deciding between altered ashes and eruptive rocks. His 

 work had chiefly been among the Westmoreland rocks. He con- 

 sidered this one of the most difficult problems, and was very glad to- 

 hear the authors' conclusions. 



Mr. Tawnet entirely confided in Prof. Bonney's results. With 

 respect to the secondary development of the crystals, having been 

 shown many of the thin slices, by the author's kindness, he thought 

 it was especially clear that the quartzes had been derived, viz. from 

 a rock like a quartz-felsite. 



Dr. Hicks expressed his agreement with the view of the authors 

 as to the Sharpley rocks being tuffs. He thought the Charnwood 

 series pre-Cambrian. 



The Peesident stated that gold had recently been found in small 

 quantities by Mr. How in the quartz-veins of Peldar Tor. 



Eev. E. Hill said the authors were inclined to regard the Charn- 

 wood rocks as pre-Cambrian. The occurrence of gold was new to 

 them. 



