1852.] 



BLOFELD NOTES ON ST. HELENA. 



195 



being towards the E.N.E. at an 



angle- of 5°, we find (p = 9°. This 

 would bring the line of fault through 

 the middle of a tolerably long cut- 

 ting 150 yards off. No trace of 

 it, however, appears there ; whence 

 it probably is not of considerable 

 extent either horizontally or verti- 

 cally. 



About 200 yards from this fault, 

 and at right angles to its direction, 

 a line of disturbance runs N.N.W. 

 and S.S.E. (fig. 3, A). It is marked 

 by a sudden increase of dip, from 

 3° to 11°, and by a series of small 

 faults, greater in amount than the 

 above-mentioned, but producing no 

 displacement exceeding 2 feet. It 

 illustrates, however, the well-known 

 law of elevation, and is repeated on 

 a much larger scale at Hornpark, 

 near Mottingham, where the E. and 

 W. faults of Lee, Eltham, and 

 Woolwich are intersected by a great 

 fault running N. and S. 



P.S. Another small reversed fault 

 has been exposed since the above 

 paper was read. This also runs 

 E.N.E., with an angle of fracture of 

 only 20°, but having the upcast on 

 the north side, instead of on the 

 south. A line representing its po- 

 sition has been introduced into fig. 3, 

 a little to the north of A. It sup- 

 plies further evidence of the lateral 

 pressure above alluded to. [April 

 16, 1852.] 



3. Notes on St. Helena. By J. H. Blofeld, Esq., F.G.S. 



[Abstract.] 



In this paper the author briefly noticed the general external charac- 

 ters of the island and some of its geognostical phsenomena, and more 

 especially described the conditions under which the fossil shells of 



