W. S. Gresley — A Modern Ferruginous Conglomerate. 11 



intervention of a deposit called the Calcaire de Cuesmes a grands 

 Cerillies. On the other hand, a well-marked separation exists 

 between the Tuffeau de Ciply and the underlying Cretaceous tuffeau 

 with Thecidiim papillatum. 



Our palajontological proofs are founded on the presence of nearly 

 a hundred species, for the most part casts or impressions, collected 

 in the Tuffeau de Ciply, from its base upwards, among which species 

 there exist only a very few Cretaceous fossils, and these rolled, 

 evidently derived from the underlying beds, in contrast with a rich 

 fauna having a Tertiary facies, consisting of Gasteropods, Lamelli- 

 branchs, Corals, etc., amongst which may be distinguished species 

 either identical with those of the Calcaire de Mons, or nearly allied 

 to them, associated with numerous forms probably new. 



A general examination of the smaller organisms, such as Fora- 

 minifera, Polyzoa, etc., leads us to believe that their comparison 

 with the microscopical fauna of the Calcaire de Mons will lead 

 to conclusions similar to those which we have arrived at from a 

 comparison of their molluscan fauna. 



We intend shortly to publish, in the Bulletin du Musee d'histoire 

 naturelle de Belgique, a Memoir setting forth in detail the results 

 that we have now briefly stated, and which modify in an unexpected 

 manner the stratigraphical position of the line of separation of the 

 Cretaceous and Tertiary formations of Belgium. 



IV. — On a Modern Ferruginous Conglomerate ui>on Ashby 

 Wolds, Leicestershire. 



By W. S. Gresley, F.G.S. 



DUBING the summer of 1885, in excavating for a small reservoir 

 for colliery purposes at Moira, three miles west of Ash by-de-la 

 Zouch, an interesting deposit of a kind of Limonite Iron-ore was 

 met with, the following description of which may interest some of 

 the readers of the Geological Magazine. 



The bed occurred about five feet below the surface soil, near a 

 small stream, at a place called "Hanging Hill" [see Geol. 1-inch 

 Map, Quarter-Sheet No. 63, N.W.]. In thickness it hardly reached 

 a foot, but its extent was not proved ; it rested unconformably 

 upon stiff blue clay of the Coal-measures, and was overlaid by 

 yellowish clay, loam, sand, etc., unstratified, containing a few pebbles 

 and other drifted matter ; it was principally composed of nodules 

 and fragments of nodules of earthy yellowish brown ironstone, of 

 similarly formed pieces of very hard and compact light grey siliceous 

 stone having a thin crust or shell of compact dark brown iron-ore, 

 (probably gothite), of sandy nodular masses largely composed of 

 limonite; of fragments and small nodules of fossililerous hard red 

 haematite generally coated with a bright red skin which is often 

 powdery ; also specimens of compact brown iron ore having a yellow 

 ochre coating, sometimes the compact red and yellow haematites are 

 associated in the same sample, the latter variety appears to form 



