Rejjorts and Proceedings — Geological Society of London. 329 



(2) The high-level gravel-beds of La Cote above Eolle and of the 

 Jorat district above Lausanne are, like the corresponding 

 deposits of the Uetliberg near Zurich, and of the Dombes 

 and of Lyons, true Deckenschottei'. Hence the term 

 ' alluvion ancienne,' should, in its proper acceptation, only 

 apply to the high-level deposits. 

 ^(3) The formation of the present deep lake-basin of Geneva was, 

 like that of Zurich, primarily due to the lowering of the 

 valley-floor by flexures of the Molasse and its contact- 

 zones, posterior to the maximum glaciation, as evidenced 

 more especially by the reverse dip of the old erosion 

 terraces. 

 The author holds that the concord of evidence in the two cases 

 strengthens the conclusion, already arrived at by analogy in his 

 previous paper, that the Lake of Geneva, together with the other 

 principal zonal lakes between the Alps and the Jui-a, was formed 

 •under similar conditions and at the same time as the Lake of Zurich, 

 that is, towards the close of the Glacial Period ; indeed, the 

 phenomena in support of that view are, in the case of the Lake 

 of Geneva, on a grander scale, more striking, and, if anything, 

 more conclusive. 



ML— May 2oth, 1904— J. E. Marr, Sc.D., F.KS., President, in the 

 Chair. The following communications were read : — 



1. " On the occurrence of a Limestone with Upper Gault Fossils 

 at Barnwell, near Cambridge." By William George Fearnsides, Esq., 

 M.A., F.G.S. 



The section in the great Gault pit worked by the Cambridge 

 Brick Company at Barnwell is as follows : — 



Thickness in feet. 



5. Surface-soil with gravel and Chalk Marl, disturbed 15 to 17 



4. Dull leaden clay, almost devoid of determinable fossils 



but ^vith a few phosphate nodules, etc 39 



3. Compact, well -jointed, homogeneous clay, with large 



ammonites of the ro«^r«^«w- or i?0Mc/j«r(?i«;i«««-type ... 3 

 2. Hard calcareous bed with Inoceramus , Schlmnbachia 



varicosa, and Terebratula hipUcata to 1 



1. Blue, well-laminated clay, with fossil fragments and pale 



phosphate nodules 4 seen 



The limestone is variable in thickness, and is largely made up of 

 comminuted shells of Inoceramus. It occurs in a series of flattened 

 lenticles, a few yards in diameter and about a foot thick. It 

 contains abundant phosphate nodules of at least three types — green, 

 pale, and dark-brown in colour. Foraminifei'a are abundant, as also 

 fragments of lamellibranchs, brachiopods, small gastropods, echinoids, 

 and Crustacea. A fibrous material, possibly chitin, chips of quartz, 

 a little orthoclase, and glauconite are also recognized microscopically. 

 The fauna is not markedly different from that of the underlying 

 ■clay. A list is given which shows that this fauna has been recorded 

 from the Upper Gault of Folkestone, and agrees most closely with 

 tliat from Bed ix of Mr. Hilton Price's paper on that locality. As 



