372 Reports and Proceedings — Geological Society of London. 



Cornbrash Fossils. The officers were re-elected, namely, Dr. Henry 

 Woodward, President; Mr. Etheridge, Treasurer ; and Dr. Smith 

 Woodward, Secretary. The new members of Council were Professor 

 Boyd Dawkins, the Rev. J. F. Blake, Dr. Wheelton Hind, and 

 Mr. F. W. Eudler. 



II. — The Geological Society of London. 



June 24tb, 1903.— J. J. H. Teall, Esq., M.A., F.E.S., Vice-President, 

 in the Chair. The following communications were read : — 



1. " On a Transported Mass of Ampthill Clay in the Boulder- 

 Clay at Biggleswade (Bedfordshire)." By Henry Home, Esq. 

 (Communicated by Horace B. Woodward, Esq., F.E.S., F.G.S.) 



The section described was exposed in the construction of a well 

 two miles south-south-east of Biggleswade railway station. Under 

 10 feet 6 inches of soil and Boulder-clay, the Ampthill Clay was 

 penetrated for 67 feet, resting on Chalky Boulder-clay, fine silty 

 clay, disturbed Gault, and Lower Greensand. The clay is litho- 

 logically identical with, the Ampthill Clay with its selenite crystals, 

 and contains Ammonites excavatus, often covered with Serpulse, but 

 no examples of Ostrea deltoidea. The boulder was probably an 

 outlier situated in Oxford Clay at a level high enough to be 

 ploughed into by the agent which formed the Glacial Drift. The 

 distance from which it was moved may not have been greater than 

 a mile or two, but on this point no definite opinion can be expressed. 

 The Septaria in it have a dip of 9°. The extent of the mass has not 

 yet been ascertained. 



2, " The Rhsetic and Lower Lias of Sedbury Cliff, near Chepstow." 

 By Linsdall Eichardson, Esq., F.G.S. 



The chief portion of the cliff-section described has a direction 

 north-east and south-west ; the dip of the beds not exceeding 3° 

 to the south-south-east. The section is as follows : — 



Lower Lias. 



Upper ( „' 

 Eh^tic. j / 



5a. 



5b. 



6. 



7. 



8. 



9. 

 10. 

 11. 

 12. 

 13. 

 14. 

 16. 



Lower 

 Eh^tic. 



Upper ( I. 

 Keuper. \ II. 



Based ou a conglomerate composed of fragments of 



Gotham Marble 



Greenish-grey, chiefly laminated shales ^ 



Estheria-hedi 



Greenish-grey shales 



Black, laminated shales 



Hard, blackish-blue limestone 



Black, earthy shales, fuU of shell debris 

 Hard, slightly pyritic limestone ... ... ... 



Black, selenitic shales 



Firm, black, thinly laminated shales 



Black, earthy shales 



Alternating layers of sandstone and shale, the 



with small quartz-pebbles 



Sandstone (Bone-bed), coarse and calcareous, with 



of ' Tea-green Marl ' 



' Tea-green Marls ' with hard bed of marlstone 

 Bed Marls, angular fracture 



ft. in. 



