224 Prof. S. H. Reynolds — Serpentine near Wells, Somerset. 



clay, are of importance in this inquiry (it seems that there are two 

 glacial deposits at the latter place, one above the palseolithic horizon 

 and one below it), and it is suggested that, at both these places, 

 occur patches of a once widespread sheet of glacial clay older than 

 what is known as the Chalky Boulder-clay, and perhaps referable 

 to the Mindel glaciation. The well-known section at High Lodge, 

 Mildenhall, where a Mousterian brick-earth interdigitates with a 

 mass of Chalky Boulder-clay,' represents probably a renmant of the 

 Mousterian deposits, many of which were ploughed up by the ice 

 and furnished the implements of this culture found in the 

 Boulder-clay. 



Professor J. E. Marr, F.E.S., who has visited Ipswich and seen and 

 examined the evidence at my disposal, permits me to say that he 

 considers a prima facie case has been made out for the above 

 correlation, so far as the deposits of East Anglia are concerned. 

 He considers, however, that the reference of certain deposits 

 to the periods of glaciation upon the Continent requires further 

 investigation. With this conclusion I am in agreement. 



On the Occurrence of Picritic Serpentine at Ebbor, 

 near Wells, Somerset. 



By Sidney H. Reynolds, M.A., Sc.D., Professor of Geology in the 

 University of Bristol. 



TN October, 1904, Mr. H. E. Balch, of Wells, forwarded some 

 -L pieces of " trap " from Ebbor to the late Mr. H. B. Woodward, 

 who handed them to Dr. J. S. Flett for examination. At a slightly 

 later date pieces were given to me by Dr. T. F. Sibly', who was then 

 at work in the Mendips. 



It was at once clear that we had here an ultra-basic rock, and 

 Dr. Flett, whose description will be quoted immediately, pointed 

 out the practical identity of the rock with that from Clicker Tor, 

 Menheniot, Cornwall, whence he believed the specimens had been 

 derived. The rock occurred in the form of small pieces, rarely more 

 than 2 J inches long, scattered over quite a limited area about a quarter 

 of a mile N.W. of Wookey Hole and due south of Lammas Wood. 

 The very great majority were found in a field due south of Lammas 

 Wood, a few pieces were found in the next field to the west, and one 

 in the adjacent field to the east. The area lies slightly below the 

 400 ft. contour-line. The pieces are all fairly angular and com- 

 paratively little weathered. Probably over 200 pieces of the rock 

 have been found here from time to time ; on December 18, 1906, 

 I myself found twenty-one pieces scattered over a small space in 

 the central part of the eastern third of the chief field. I have 

 found others on subsequent occasions, but for some years now 

 have not been able to find any more. Mr. Balch, however, reports 



1 Sturge, Proc. P.S.E.A., vol. i, pt. i, pp. 43-10.5. 



