OF THE MALVEKN HILLS. 



485 



the highest beds a little south of Malvern "Wells should be referred 

 to the base of the Upper group. 



The Herefordshire Beacon is probably composed chiefly of the top 

 of the Lower and bottom of the Middle groups, but exposures of 

 rock are not very numerous ; while the northern part of Swinyard's 

 Hill belongs, I believe, to the Lower group. South of the fault 

 which crosses Swinyard's Hill down to the south end of the range 

 the rocks belong to the Upper group, except perhaps the southern 

 portion of Midsummer Hill, which may represent the top of the 

 Middle Group. 



In support of such evidence as appears to me to denote repetition 

 of the gneissic beds, I cannot do better than quote the sequence of 

 rocks recorded by Dr. Holl in various parts of his paper, since, 

 although he disclaims any belief in the repetition of these beds, his 

 observations are in most instances of a much more detailed character 

 than my own. Thus on pp. 76 and 77 of his paper he gives a list 

 of the beds traversed in passing from the southern to the northern 

 end of Swinyard's Hill, stating the approximate thicknesses as 

 shown along the crest of the hill. 



Beginning at the south end he records : — 



ft. 



Micaceous schist and fine-grained gneissic 

 rocks, with a few subordinate bands of horn- 

 blende-schist 665 



Fine-grained red granulite 95 



Fine-grained gneissic rocks and mica-schist, 

 with a few narrow bands of hornblende- 

 schist 565 



Hornblende-schist 15 



Mica-schist 15 



Unseen 85 



ft. 



680 



Here we have, assuming his granulite to form the axis of a fold, 

 665 feet of rock on one side, corresponding more or less precisely 

 in lithological characters with 595 feet of rock on the other side, 

 with a margin of 85 feet of unseen rock to supply a deficiency of 

 70 feet. 



These beds belong to what I have here termed the Upper Group. 

 They are succeeded on the north, according to Dr. Holl, by trap- 

 rock, micaceous and hornblendic schists, and fine-grained gneissic 

 rocks with subordinate bands of hornblende-schist. Then follows 

 what I conceive to be another, but a minor, fold, viz. : — 



ft. 



Diorite, rich in hornblende, with small quartzo- 



felspathic veins 22 



Schist 3 



Diorite, rich in hornblende, with many quartzo- 

 felspathic veins 25 



Here, then, judging by the approximate thicknesses, we have in 

 all probability a repetition by flexure. 



If the coarsely crystalline rocks forming the northern part of 



