121 



th. entire deposit. It is observable tl.at tliese bones exhibit no appearance 

 cfbeino- rolled. • There is therefore no reason to associate the marks of 

 water-a°ction on the roof and sides, with the date of the in-filling of the bones 

 and angular fragments. Moreover, it is clear that so long as the water had 

 force to propel the stony fnigments, no layer of mud could accumulate. 

 But that a change at length took place is certain, probably in consequence 

 of some conviilsion by which the drainage of that district was altered, and 

 the waters which had used that channel were diverted, except perhaps at 

 particular periods of overflow, when fissures now closed may have given 

 access through infiltration from neighbouring caverns-possibly the resort 

 of carnivora— to the gravel and bones which we now find 



" Confus'dly hurled, 

 The relics of a former world," 

 in such profusion, and in such a remarkable state of preservation, in the 



Banwell Caves. 



Thursday, 19th of June, was occupied in an excursion to WeUs Cathe- 

 dral and Glastonbury Abbey. The geologists aflerwards ascended the Tor 

 Hill, at Glastonbury, examining by the way the structure of this command- 

 ing elevation, which, in common with many other eminences, rismg 

 abruptly out of the flat levels of Somersetshire, remain to show the eroding 

 efFectsof water-action overa vast thickness of beds, of which these out-liers 

 are now the only evidences. The following " Notes upon the Geology of the 

 Tor Hill, near Glastonbury," were supplied to me by Edward Haktswick 



T\ 1? T7 O Q 



"^'^Thrheight of this hiU may be roughly estimated at about 500 feet. Our 

 knowledge of the geology of its lower portion is obscure, there being no 

 quarries or natural sections to lay bare its strata. Whether the beds of the 

 Luper enter at all into its stucture, or whether as at Street, they underlie 

 the surface of the surrounding valley, I cannot say, since the lowest beds 

 that I have been able to notice are some of the Limestones of the BucTc- 

 landi-zone' of the Lower Lias. These occur in a quarry on the north side 

 of the hill, at about 90 feet over the level of the valley at the Bnck-Kilns. 

 I cannot, however, say to what portion of the Lima series these beds belong. 

 .'A little above the quarry mentioned, I found sands belonging to the 

 Middle Lias, but I am by no means sure that they are in their original 

 position ; on the contrary, I am inclined to think that they have shpped fi-om 

 a higher level. The junction of the Lower with the Middle Lias is there- 

 fore totally concealed. In the lane leading from the town to the Tor, a 

 section is obtained of a portion of the Middle Lias Sands; and in the quar- 

 ries on Stone Down, we find these sands capped by two beds of Marlstone 

 4 feet in thickness. These in turn are covered by the Upper Lias clays and 



