II. 



By Prof. C, LLOYD MORGAN, F.G.S., Assoc. R.S.M, 



NOTWITHSTANDING the admirable geological work, 

 official and unofficial, tliat has been done in the 

 Mendip Hills, there still remain many points which, to me 

 at least, are far from satisfactorily explained. No one has 

 yet given an adequate explanation of the system of faults 

 and thrusts by which the Vobster and Luckirigton Lime- 

 stones have reached their present position. The bands of 

 grit and shales associated with the Vobster limestone point 

 to the fact that the beds may probably be referred to the 

 Upper Transition Beds (Upper Limestone Shales) of the 

 Avon section. Little is known, however, concerning the 

 Mendip beds of this horizon. We possess, in fact, very little 

 accurate knowledge concerning the Millstone Grit and under- 

 lying beds in the Mendips, and that little seems to point to 

 conditions of deposit somewhat different from those which 

 obtained further north. 



In a memoir I have promised to prepare for the Bristol 

 Naturalists' Society, On the Geology of the Avon Basin and 

 the Mendip Hills, I hope to publish the results of my own 

 observations in this interesting district. There are one or 



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