234 PEOCEEDINGS OF THE GEOLOGICAL SOCIETY. [Jan. 24, 



I received from Captain Cocheteux, a small but very interesting 

 collection of fossils from the lowest Diestien beds in the neighbour- 

 hood of Fort 4, towards Edeghem (see list) ; but we did not visit the 

 Edeghem brickfield-section above referred to as described by M. 

 Nyst. Erom a recollection of what I saw in 1861, the Diestien beds 

 exactly corresponded in colour and composition with those of the 

 enceinte. The only place near Antwerp at which we saw the super- 

 position of the Diestien Crag to the Rupellien clay was at Schelle. 



4. Schelle. — The Crag-sea accumulations of the several locaUties 

 to be noticed have been called Diestien, but they belong to very dif- 

 ferent submarine conditions from those of the base of the Antwerp 

 Crag. 



As at Edeghem, beds of Eupellien clay are worked extensively 

 for bricks and tiles at Schelle. This Rupellien clay is an upper 

 member of the Nummulitic series of Belgium, corresponding in age 

 and condition with, and externally very hke, our Barton clay of Hants. 



The RupeUien clay is capped by sandy beds, which, towards 

 their base, and particularly at the upper end of the section, become 

 as dark as those about Antwerp, though they are not so thick. 

 These sands are altogether about 3'5 metres thick. A verj^ dis- 

 tinctly marked hne separates these formations ; at one place there 

 is unconformity on an eroded surface, and throughout there is a line 

 or band of flints, some large, remaining in place, together with Sep- 

 tarisB from the Eupellien clay; one of these measured more than 

 a foot across. These Crag beds belong for the most part to the drift- 

 sand sea zone. 



At Schelle the upper surface of the Crag sand has been eroded, 

 and at either end of the section the denudation has been carried 

 down to the RupeUien clay. Schelle is 10 kilometres south of 

 Antwerp, and the great interest of the section, as of that of Edeg- 

 hem, consists in the evidence it affords of the complete break of 

 continuity between the Eupellien clay beds and the overlying 

 Crag. 



5. Louvain. — Louvain is between 4 and 5 myriametres south-east 

 of Antwerp. The remains of the Crag- sea beds occur only over the 

 Belgian area in detached patches, and the interest of this locality 

 consists in the evidence it affords of the great depth to which denu- 

 dation of a date subsequent to the Crag period has been carried. 



We were conducted to an interesting section on the side of a line 

 of hiU, on the road from Louvain to PeILenberg;;,and Tirlemont, by 

 M. Yan Beneden, who had with him a diagram prepared by M. Du- 

 mont. The upper part of this section alone is referable to the Crag, 

 the details are given in fig. 1. 



On an eroded surface of white and yellow marls, the equivalents 

 of the RupeUien clays, according to Dumont, is first a line of chalk- 

 flint shingle and gravel, surmounted by brown and ferruginous Die- 

 stien sands ; these beds belong in a marked manner to the sea- 

 zone of drifting sand. The uppermost portion of this capping to the 

 hill consists of ferruginous sands distinctly bedded, occasionally dia- 

 gonally, and below this is a line of waterworn flints on a scored sur- 



