Vol. 6$.~\ IXLIER IN THE EASTERN MENDIPS. 223 



Further detail with regard to the tuff in the 

 foregoing section. 



7. This mass of tuff and shaly material was exposed during the 

 latter part of 1906 by cutting back the northern side of the 

 approach to the quarry. The top of the series appears to be 

 regularly overlain by the trap, and to dip at 45° to 50° north- 

 north-westward : that is, its dip is similar in amount and direc- 

 tion to those of the tuffs below the whole trap-series. The mass 

 is, however, much crushed and disturbed, and the nature of its 

 junction with the underlying trap (Band 6) could not be 

 ascertained. Although probably interbedded, it is possible 

 that it may be caught up by the trap or faulted in. Very 

 little sign of it could be found in the south side of the quarry, 

 though only some 20 yards distant. 



5. Band 5 is of the same general type as Band 3, but is not so well 

 exposed. 



4. This is a very variable band, and includes the following rock- 

 types :— 



(a) Fine, compact, red ashy clay showing no ashy material in a hand- 



specimen, although with the aid of the microscope the presence 

 of such material can be detected. 



(b) Soft friable clay and very fine red or purple ash, with ashy 



particles (of an average length of 1 millimetre) very thickly 

 and evenly distributed. 



(c) Compact, red ashy clay, with larger lapilli reaching to a length of 



a centimetre or rather more, and showing a tendency to be 

 arranged in layers. 



3. It would be difficult to find a more obvious example of a tuff than 

 this rock, which consists of angular fragments of trap ranging in 

 length from about three-quarters of an inch downward to a size 

 such as to render them indistinguishable in a hand-specimen. 



2. This band, which is very poorly exposed, is of the same 

 character as Band 4. 



1. The hard bands in this tuff, which is always rather fine-grained, 

 tend to weather yellow or green — not white or various shades 

 of red and brown, as is the case with the other bands. 

 Fossils occur chiefly in the upper part, and in the finer layers. 

 The following fossils obtained from this band have been 

 determined by Mr. F. 11. Cowper Eeed 1 : — 



Lindstroemia cf. rvgom, Phiii. Strophomena arenacea (?) Salt. 



Lindstroemia cf. mbduplicata, M'Coy. I Pentamerm (?) rotundus (?) Sow. 



Orthis (Dalmanella) cleganlula, ; Lingtda cf. Symondsi, Salt. 



Dalm. (very common). Ovtlionota (I). 



BJiynchonella Bavidsoni, M'Coy (very Ctenodonta or Lyrodesma sp. 



common). Pterincea sp. 



Meristina tumida (?) Dalm. Horioatoma globosum (?) Sow. 



1 I wish to express my most sincere thanks to Mr. Cowper Reed, for his 

 kindness in determining my fossils. This is only one of many occasions on 

 which I have been indebted to him. 



